% % This file was created by the TYPO3 extension % bib % --- Timezone: UTC % Creation date: 2024-11-21 % Creation time: 10-00-41 % --- Number of references % 406 % @Inproceedings { 2025_vansloun_ransomwareio, title = {Detecting Ransomware Despite I/O Overhead: A Practical Multi-Staged Approach}, year = {2025}, month = {2}, publisher = {Internet Society}, booktitle = {Proceedings of the 22nd Annual Network and Distributed System Security Symposium (NDSS '25), February 24–28, 2025, San Diego, CA, USA}, event_place = {San Diego, CA, USA}, event_name = {Network and Distributed System Security Symposium}, event_date = {February 24–28, 2025}, state = {accepted}, ISBN = {978-1-891562-93-8}, reviewed = {1}, author = {van Sloun, Christian and Woeste, Vincent and Wolsing, Konrad and Pennekamp, Jan and Wehrle, Klaus} } @Inproceedings { 2024_lohmoeller_tee_datasharing, title = {Complementing Organizational Security in Data Ecosystems with Technical Guarantees}, year = {2024}, month = {12}, day = {19}, tags = {internet-of-production;health}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-lohmoeller-tee-data-sharing.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 1st Conference on Building a Secure and Empowered Cyberspace (BuildSEC '24), December 19-21, 2024, New Delhi, India}, event_place = {New Delhi, India}, event_name = {Building a Secure \& Empowered Cyberspace}, event_date = {December 19-21, 2024}, state = {accepted}, language = {en}, reviewed = {1}, author = {Lohm{\"o}ller, Johannes and Matzutt, Roman and Loos, Joscha and Vlad, Eduard and Pennekamp, Jan and Wehrle, Klaus} } @Inproceedings { 2024_lohmoeller_scematch, title = {scE(match): Privacy-Preserving Cluster Matching of Single-Cell Data}, year = {2024}, month = {12}, day = {16}, tags = {rfc;health}, publisher = {IEEE}, booktitle = {Proceedings of the International Workshop on AI-Driven Trust, Security and Privacy in Computer Networks (AI-Driven TSP '24), co-located with the 23rd IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom '24), December 17-21, 2024, Sanya, China}, event_place = {Sanya, China}, event_name = {TrustCom 2024}, event_date = {December 17-21, 2024}, state = {accepted}, language = {en}, reviewed = {1}, author = {Lohm{\"o}ller, Johannes and Scheiber, Jannis and Kramann, Rafael and Wehrle, Klaus and Hayat, Sikander and Pennekamp, Jan} } @Inproceedings { 2024_dahlmanns_lua-iot, title = {LUA-IoT: Let's Usably Authenticate the IoT}, year = {2024}, month = {11}, day = {20}, abstract = {Following the advent of the Internet of Things (IoT), users and their devices transmit sensitive data over the Internet. For the Web, Let’s Encrypt offers a usable foundation to safeguard such data by straightforwardly issuing certificates. However, its approach is not directly applicable to the IoT as deployments lack a (dedicated) domain or miss essentials to prove domain ownership required for Let’s Encrypt. Thus, a usable approach to secure IoT deployments by properly authenticating IoT devices is missing. To close this research gap, we propose LUA-IoT, our framework to Let’s Usably Authenticate the IoT. LUA-IoT enables autonomous certificate enrollment by orienting at the success story of Let’s Encrypt, seamlessly integrating in the setup process of modern IoT devices, and relying on process steps that users already know from other domains. In the end, LUA-IoT binds the authenticity of IoT deployments to a globally valid user identifier, e.g., an email address, that is included in certificates directly issued to the IoT deployments. We exemplarily implement LUA-IoT to show that it is realizable on commodity IoT hardware and conduct a small user study indicating that LUA-IoT indeed nudges users to safeguard their devices and data (transmissions).}, note = {Lecture Notes in Computer Science (LNCS)}, tags = {internet-of-production}, publisher = {Springer}, booktitle = {Proceedings of the 27th Annual International Conference on Information Security and Cryptology (ICISC '24), November 20-22, 2024, Seoul, Korea}, event_place = {Seoul, Korea}, event_name = {International Conference on Information Security and Cryptology}, event_date = {November 20-22, 2024}, state = {accepted}, ISSN = {0302-9743}, reviewed = {1}, author = {Dahlmanns, Markus and Pennekamp, Jan and Decker, Robin and Wehrle, Klaus} } @Article { 2024_querfurth_mcbert, title = {mcBERT: Patient-Level Single-cell Transcriptomics Data Representation}, journal = {bioRxiv}, year = {2024}, month = {11}, day = {7}, tags = {health}, DOI = {10.1101/2024.11.04.621897}, author = {von Querfurth, Benedikt and Lohm{\"o}ller, Johannes and Pennekamp, Jan and Bleckwehl, Tore and Kramann, Rafael and Wehrle, Klaus and Hayat, Sikander} } @Inproceedings { 2024-fink-cired, title = {Resilient Control Center to Substation Device Communication}, year = {2024}, month = {11}, day = {7}, abstract = {Resilient communication is essential for reliably exchanging parameters and measurements in distribution systems. Thus, deploying redundant hardware for both local and wide area communication, along with protocols that leverage these redundancies for automatic and timely failovers, is fundamental. This paper presents a comprehensive overview of key protocols (PRP/HSR, MPLS-TP, and MPTCP) which offer robust recovery mechanisms. Additionally, it provides a specific concept and topology that effectively combine the presented protocols to ensure resilient communication from the control center to substation devices.}, tags = {ven2us}, booktitle = {Proceedings of the CIRED Chicago Workshop 2024 on Resilience of Electric Distribution Systems, November 7-8, 2024, Chicago, USA}, event_place = {Chicago}, event_name = {CIRED Chicago Workshop 2024 on Resilience of Electric Distribution Systems}, event_date = {November 7-8, 2024}, state = {accepted}, reviewed = {1}, author = {Fink, Ina Berenice and Dahlmanns, Markus and Erichsen, Gerrit and Wehrle, Klaus} } @Inproceedings { 2024-buildsys-breyer-waterreview, title = {A Critical Review of Household Water Datasets}, year = {2024}, month = {11}, day = {6}, pages = {318-322}, url = {www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-breyer-waterreview.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 11th ACM International Conference on Systems for Energy-Efficient Buildings, Cities, and Transportation (BuildSys 2024), Hangzhou, China}, language = {en}, ISBN = {979-8-4007-0706-3/24/11}, DOI = {10.1145/3671127.3698793}, reviewed = {1}, author = {Breyer, Justus and Petri, Maximilian and Alizai, Muhammad Hamad and Wehrle, Klaus} } @Inproceedings { 2024-buildsys-breyer-transferstudy, title = {Investigating Domain Bias in NILM}, year = {2024}, month = {11}, day = {6}, pages = {333-336}, url = {www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-breyer-transferstudy.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 11th ACM International Conference on Systems for Energy-Efficient Buildings, Cities, and Transportation (BuildSys 2024), Hangzhou, China}, language = {en}, ISBN = {979-8-4007-0706-3/24/11}, DOI = {10.1145/3671127.3699532}, reviewed = {1}, author = {Breyer, Justus and Jauhari, Sparsh and Glebke, Ren{\'e} and Alizai, Muhammad Hamad and Stroot, Markus and Wehrle, Klaus} } @Inproceedings { 2024_lohmoeller_consent, title = {Toward Technically Enforceable Consent in Healthcare Research}, year = {2024}, month = {10}, day = {17}, volume = {4}, pages = {7-12}, tags = {health}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-lohmoeller-consent-aware-discovery.pdf}, misc2 = {Online}, publisher = {Fraunhofer ISI}, booktitle = {Research Papers of the Platform Privacy, 2024, October 17-18, Berlin, Germany}, event_place = {Berlin}, event_name = {Plattform Privatheit}, event_date = {October 17-18, 2024}, language = {en}, ISSN = {2942-8874}, DOI = {10.24406/publica-3685}, reviewed = {1}, author = {Lohm{\"o}ller, Johannes and Pennekamp, Jan and Wehrle, Klaus} } @Inproceedings { 2024-wolsing-deployment, title = {Deployment Challenges of Industrial Intrusion Detection Systems}, year = {2024}, month = {9}, abstract = {With the escalating threats posed by cyberattacks on Industrial Control Systems (ICSs), the development of customized Industrial Intrusion Detection Systems (IIDSs) received significant attention in research. While existing literature proposes effective IIDS solutions evaluated in controlled environments, their deployment in real-world industrial settings poses several challenges. This paper highlights two critical yet often overlooked aspects that significantly impact their practical deployment, i.e., the need for sufficient amounts of data to train the IIDS models and the challenges associated with finding suitable hyperparameters, especially for IIDSs training only on genuine ICS data. Through empirical experiments conducted on multiple state-of-the-art IIDSs and diverse datasets, we establish the criticality of these issues in deploying IIDSs. Our findings show the necessity of extensive malicious training data for supervised IIDSs, which can be impractical considering the complexity of recording and labeling attacks in actual industrial environments. Furthermore, while other IIDSs circumvent the previous issue by requiring only benign training data, these can suffer from the difficulty of setting appropriate hyperparameters, which likewise can diminish their performance. By shedding light on these challenges, we aim to enhance the understanding of the limitations and considerations necessary for deploying effective cybersecurity solutions in ICSs, which might be one reason why IIDSs see few deployments.}, keywords = {Industrial Intrusion Detection Systems, Cyber-Physical Systems, Industrial Control Systems, Deployment}, web_url = {https://arxiv.org/pdf/2403.01809}, publisher = {Springer}, booktitle = {Proceedings of the 10th Workshop on the Security of Industrial Control Systems \& of Cyber-Physical Systems (CyberICPS '24), co-located with the the 29th European Symposium on Research in Computer Security (ESORICS '24)}, event_place = {Bydgoszcz, Poland}, event_name = {10th Workshop on the Security of Industrial Control Systems \& of Cyber-Physical Systems (CyberICPS 2024)}, event_date = {September 16-20, 2024}, state = {accepted}, language = {English}, reviewed = {1}, author = {Wolsing, Konrad and Wagner, Eric and Basels, Frederik and Wagner, Patrick and Wehrle, Klaus} } @Inproceedings { 2024-saillard-exploring, title = {Exploring Anomaly Detection for Marine Radar Systems}, year = {2024}, month = {9}, abstract = {Marine radar systems are a core technical instrument for collision avoidance in shipping and an indispensable decision-making aid for navigators on the ship’s bridge in limited visibility conditions at sea, in straits, and harbors. While electromagnetic attacks against radars can be carried out externally, primarily by military actors, research has recently shown that marine radar is also vulnerable to attacks from cyberspace. These can be carried out internally, less “loudly”, and with significantly less effort and know-how, thus posing a general threat to the shipping industry, the global maritime transport system, and world trade. Based on cyberattacks discussed in the scientific community and a simulation environment for marine radar systems, we investigate in this work to which extent existing Intrusion Detection System (IDS) solutions can secure vessels’ radar systems, how effective their detection capability is, and where their limits lie. From this, we derive a research gap for radar-specific methods and present the first two approaches in that direction. Thus, we pave the way for necessary future developments of anomaly detection specific for marine navigation radars.}, keywords = {Marine Radar Systems, Maritime Cyber Security, Intrusion Detection Systems, Anomaly Detection, Navico BR24}, publisher = {Springer}, booktitle = {Proceedings of the 10th Workshop on the Security of Industrial Control Systems \& of Cyber-Physical Systems (CyberICPS '24), co-located with the the 29th European Symposium on Research in Computer Security (ESORICS '24)}, event_place = {Bydgoszcz, Poland}, event_name = {10th Workshop on the Security of Industrial Control Systems \& of Cyber-Physical Systems (CyberICPS 2024)}, event_date = {September 16-20, 2024}, state = {accepted}, language = {English}, reviewed = {1}, author = {Saillard, Antoine and Wolsing, Konrad and Wehrle, Klaus and Bauer, Jan} } @Inproceedings { 2024-wagner-madtls, title = {Madtls: Fine-grained Middlebox-aware End-to-end Security for Industrial Communication}, year = {2024}, month = {7}, day = {1}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-wagner-madtls.pdf}, publisher = {ACM}, booktitle = {19th ACM ASIA Conference on Computer and Communications Security (ACM AsiaCCS '24), Singapur}, event_place = {Singapur}, event_name = {ACM ASIA Conference on Computer and Communications Security (AsiaCCS)}, event_date = {July 1-5, 2024}, DOI = {10.1145/3634737.3637640}, reviewed = {1}, author = {Wagner, Eric and Heye, David and Serror, Martin and Kunze, Ike and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2024-dahlmanns-cired, title = {Reliable and Secure Control Center to Station Device Communication}, year = {2024}, month = {6}, day = {19}, abstract = {The increasing demands on the power grid require intelligent and flexible solutions that ensure the grid's stability. Many of these measures involve sophisticated communication between the control center and the stations that is not efficiently realizable using traditional protocols, e.g., IEC 60870-5-104. To this end, IEC 61850 introduces data models which allow flexible communication. Still, the specification leaves open how DSOs should interconnect their stations to realize resilient communication between the control center and station devices. However, DSOs require such communication to adapt modern solutions increasing the grid's capacity, e.g., adaptive protection systems. In this paper, we present our envisioned network and communication concept for future DSO's ICT infrastructures that enables the control center to resiliently and flexibly communicate with station devices. For resilience, we suggest interconnecting each station with two distinct communication paths to the control center, use MPLS-TP and MPTCP for fast failovers when a single link fails, and mTLS to protect the communication possibilities against misuse. Additionally, in accordance with IEC 61850, we envision the control center to communicate with the station devices using MMS by using the station RTU as a proxy.}, tags = {ven2us}, booktitle = {Proceedings of the CIRED workshop on Increasing Distribution Network Hosting Capacity 2024, June 19-20, 2024, Vienna, Austria}, event_place = {Vienna}, event_name = {CIRED workshop on Increasing Distribution Network Hosting Capacity 2024}, event_date = {June 19-20, 2024}, DOI = {10.1049/icp.2024.2096}, reviewed = {1}, author = {Dahlmanns, Markus and Fink, Ina Berenice and Erichsen, Gerrit and Lin, Guosong and Hammer, Thomas and Borkenhagen, Burkhard and Schneider, Sebastian and Maahsen, Christof and Wehrle, Klaus} } @Inproceedings { 2024_dahlmanns_ipv6-deployments, title = {Unconsidered Installations: Discovering IoT Deployments in the IPv6 Internet}, year = {2024}, month = {5}, day = {10}, abstract = {Internet-wide studies provide extremely valuable insight into how operators manage their Internet of Things (IoT) deployments in reality and often reveal grievances, e.g., significant security issues. However, while IoT devices often use IPv6, past studies resorted to comprehensively scan the IPv4 address space. To fully understand how the IoT and all its services and devices is operated, including IPv6-reachable deployments is inevitable-although scanning the entire IPv6 address space is infeasible. In this paper, we close this gap and examine how to best discover IPv6-reachable IoT deployments. To this end, we propose a methodology that allows combining various IPv6 scan direction approaches to understand the findability and prevalence of IPv6-reachable IoT deployments. Using three sources of active IPv6 addresses and eleven address generators, we discovered 6658 IoT deployments. We derive that the available address sources are a good starting point for finding IoT deployments. Additionally, we show that using two address generators is sufficient to cover most found deployments and save time as well as resources. Assessing the security of the deployments, we surprisingly find similar issues as in the IPv4 Internet, although IPv6 deployments might be newer and generally more up-to-date: Only 39\% of deployments have access control in place and only 6.2\% make use of TLS inviting attackers, e.g., to eavesdrop sensitive data.}, keywords = {Internet of Things, security, Internet measurements, IPv6, address generators}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-dahlmanns-ipv6.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 2024 IEEE/IFIP Network Operations and Management Symposium (NOMS '24), May 6-10, 2024, Seoul, Korea}, event_place = {Seoul, Korea}, event_name = {2024 IEEE Network Operations and Management Symposium}, event_date = {May 6-10, 2024}, DOI = {10.1109/NOMS59830.2024.10574963}, reviewed = {1}, author = {Dahlmanns, Markus and Heidenreich, Felix and Lohm{\"o}ller, Johannes and Pennekamp, Jan and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2024-dahlmanns-doctoralsym, title = {Protocol Security in the Industrial Internet of Things}, year = {2024}, month = {5}, day = {10}, abstract = {Advances like Industry 4.0 lead to a rising number of Internet-connected industrial deployments and thus an Industrial Internet of Things with growing attack vectors. To uphold a secure and safe operation of these deployments, industrial protocols nowadays include security features, e.g., end-to-end secure communication. However, so far, it is unclear how well these features are used in practice and which obstacles might prevent operators from securely running their deployments. In this research description paper, we summarize our recent research activities to close this gap. Specifically, we show that even secure-by-design protocols are by far no guarantee for secure deployments. Instead, many deployments still open the doors for eavesdropping attacks or malicious takeovers. Additionally, we give an outlook on how to overcome identified obstacles allowing operators to configure their deployments more securely.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-dahlmanns-disssymposium.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 2024 IEEE/IFIP Network Operations and Management Symposium (NOMS '24), May 6-10, 2024, Seoul, Korea}, event_place = {Seoul, Korea}, event_name = {2024 IEEE Network Operations and Management Symposium}, event_date = {May 6-10, 2024}, DOI = {10.1109/NOMS59830.2024.10575096}, reviewed = {1}, author = {Dahlmanns, Markus and Wehrle, Klaus} } @Inproceedings { 2024-kunze-spintrap, title = {SpinTrap: Catching Speeding QUIC Flows}, year = {2024}, month = {5}, day = {7}, tags = {legato}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-kunze-spintrap.pdf}, publisher = {IEEE/IFIP}, booktitle = {Proceedings of the 2024 IEEE/IFIP Network Operations and Management Symposium (NOMS '24)}, event_name = {2024 IEEE/IFIP Network Operations and Management Symposium}, DOI = {10.1109/NOMS59830.2024.10575719}, reviewed = {1}, author = {Kunze, Ike and Sander, Constantin and Tissen, Lars and Bode, Benedikt and Wehrle, Klaus} } @Article { 2024_lohmoeller_sovereignty-survey, title = {The Unresolved Need for Dependable Guarantees on Security, Sovereignty, and Trust in Data Ecosystems}, journal = {Data \& Knowledge Engineering}, year = {2024}, month = {5}, day = {1}, volume = {151}, abstract = {Data ecosystems emerged as a new paradigm to facilitate the automated and massive exchange of data from heterogeneous information sources between different stakeholders. However, the corresponding benefits come with unforeseen risks as sensitive information is potentially exposed, questioning their reliability. Consequently, data security is of utmost importance and, thus, a central requirement for successfully realizing data ecosystems. Academia has recognized this requirement, and current initiatives foster sovereign participation via a federated infrastructure where participants retain local control over what data they offer to whom. However, recent proposals place significant trust in remote infrastructure by implementing organizational security measures such as certification processes before the admission of a participant. At the same time, the data sensitivity incentivizes participants to bypass the organizational security measures to maximize their benefit. This issue significantly weakens security, sovereignty, and trust guarantees and highlights that organizational security measures are insufficient in this context. In this paper, we argue that data ecosystems must be extended with technical means to (re)establish dependable guarantees. We underpin this need with three representative use cases for data ecosystems, which cover personal, economic, and governmental data, and systematically map the lack of dependable guarantees in related work. To this end, we identify three enablers of dependable guarantees, namely trusted remote policy enforcement, verifiable data tracking, and integration of resource-constrained participants. These enablers are critical for securely implementing data ecosystems in data-sensitive contexts.}, keywords = {Data sharing; Confidentiality; Integrity protection; Data Markets; Distributed databases}, tags = {internet-of-production; coat-ers; vesitrust; health}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-lohmoeller-data-sovereignty-survey.pdf}, publisher = {Elsevier}, ISSN = {0169-023X}, DOI = {10.1016/j.datak.2024.102301}, reviewed = {1}, author = {Lohm{\"o}ller, Johannes and Pennekamp, Jan and Matzutt, Roman and Schneider, Carolin Victoria and Vlad, Eduard and Trautwein, Christian and Wehrle, Klaus} } @Inproceedings { 2024-kunze-civic, title = {In-Situ Model Validation for Continuous Processes Using In-Network Computing}, year = {2024}, month = {5}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-kunze-civic.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 7th IEEE International Conference on Industrial Cyber-Physical Systems (ICPS '24)}, DOI = {10.1109/ICPS59941.2024.10639999}, reviewed = {1}, author = {Kunze, Ike and Scheurenberg, Dominik and Tirpitz, Liam and Geisler, Sandra and Wehrle, Klaus} } @Incollection { 2024_pennekamp_blockchain-industry, title = {Blockchain Technology Accelerating Industry 4.0}, year = {2024}, month = {3}, day = {7}, volume = {105}, pages = {531-564}, abstract = {Competitive industrial environments impose significant requirements on data sharing as well as the accountability and verifiability of related processes. Here, blockchain technology emerges as a possible driver that satisfies demands even in settings with mutually distrustful stakeholders. We identify significant benefits achieved by blockchain technology for Industry 4.0 but also point out challenges and corresponding design options when applying blockchain technology in the industrial domain. Furthermore, we survey diverse industrial sectors to shed light on the current intersection between blockchain technology and industry, which provides the foundation for ongoing as well as upcoming research. As industrial blockchain applications are still in their infancy, we expect that new designs and concepts will develop gradually, creating both supporting tools and groundbreaking innovations.}, tags = {internet-of-production}, publisher = {Springer}, series = {Advances in Information Security}, chapter = {17}, booktitle = {Blockchains – A Handbook on Fundamentals, Platforms and Applications}, ISBN = {978-3-031-32145-0}, DOI = {10.1007/978-3-031-32146-7_17}, reviewed = {1}, author = {Pennekamp, Jan and Bader, Lennart and Wagner, Eric and Hiller, Jens and Matzutt, Roman and Wehrle, Klaus} } @Incollection { 2024_matzutt_blockchain-content, title = {Illicit Blockchain Content – Its Different Shapes, Consequences, and Remedies}, year = {2024}, month = {3}, day = {7}, volume = {105}, pages = {301-336}, abstract = {Augmenting public blockchains with arbitrary, nonfinancial content fuels novel applications that facilitate the interactions between mutually distrusting parties. However, new risks emerge at the same time when illegal content is added. This chapter thus provides a holistic overview of the risks of content insertion as well as proposed countermeasures. We first establish a simple framework for how content is added to the blockchain and subsequently distributed across the blockchain’s underlying peer-to-peer network. We then discuss technical as well as legal implications of this form of content distribution and give a systematic overview of basic methods and high-level services for inserting arbitrary blockchain content. Afterward, we assess to which extent these methods and services have been used in the past on the blockchains of Bitcoin Core, Bitcoin Cash, and Bitcoin SV, respectively. Based on this assessment of the current state of (unwanted) blockchain content, we discuss (a) countermeasures to mitigate its insertion, (b) how pruning blockchains relates to this issue, and (c) how strategically weakening the otherwise desired immutability of a blockchain allows for redacting objectionable content. We conclude this chapter by identifying future research directions in the domain of blockchain content insertion.}, keywords = {Blockchain content insertion; Illicit content; Pruning; Redaction}, publisher = {Springer}, series = {Advances in Information Security}, chapter = {10}, booktitle = {Blockchains – A Handbook on Fundamentals, Platforms and Applications}, ISBN = {978-3-031-32145-0}, DOI = {10.1007/978-3-031-32146-7_10}, reviewed = {1}, author = {Matzutt, Roman and Henze, Martin and M{\"u}llmann, Dirk and Wehrle, Klaus} } @Inproceedings { 2024-wagner-acns-aggregate, title = {When and How to Aggregate Message Authentication Codes on Lossy Channels?}, year = {2024}, month = {3}, day = {5}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-wagner-mac-aggregation.pdf}, booktitle = {22nd International Conference on Applied Cryptography and Network Security (ACNS '24), Abu Dhabi, UAE}, event_place = {Abu Dhabi, UAE}, event_name = {International Conference on Applied Cryptography and Network Security (ACNS)}, event_date = {March 5-9, 2024}, state = {accepted}, reviewed = {1}, author = {Wagner, Eric and Serror, Martin and Wehrle, Klaus and Henze, Martin} } @Poster { 2024-dahlmanns-sul, title = {Poster: Trusted Execution Environment-basierte Sicherheit für digitale Umspannwerke}, year = {2024}, month = {3}, day = {5}, number = {19}, tags = {ven2us}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-dahlmanns-slt.pdf}, organization = {VDE ETG/FNN-Tutorial 2024 Schutz- und Leittechnik, March 05-06, 2024, Leipzig, Germany}, event_place = {Leipzig, Germany}, event_name = {VDE ETG/FNN-Tutorial 2024 Schutz- und Leittechnik}, event_date = {March 05-06, 2024}, reviewed = {1}, author = {Dahlmanns, Markus and Wark, Andreas and Genzel, Carl-Heinz and Wehrle, Klaus} } @Poster { 2024-fink-sul, title = {Poster: Resiliente Kommunikation f{\"u}r die Fernwirktechnik in digitalen Umspannwerken}, year = {2024}, month = {3}, day = {5}, number = {19}, tags = {ven2us}, organization = {VDE ETG/FNN-Tutorial 2024 Schutz- und Leittechnik, March 05-06, 2024, Leipzig, Germany}, event_place = {Leipzig, Germany}, event_name = {VDE ETG/FNN-Tutorial 2024 Schutz- und Leittechnik}, event_date = {March 05-06, 2024}, reviewed = {1}, author = {Fink, Ina Berenice and Dahlmanns, Markus and Wehrle, Klaus} } @Article { 2024_pennekamp_supply-chain-survey, title = {An Interdisciplinary Survey on Information Flows in Supply Chains}, journal = {ACM Computing Surveys}, year = {2024}, month = {2}, day = {1}, volume = {56}, number = {2}, abstract = {Supply chains form the backbone of modern economies and therefore require reliable information flows. In practice, however, supply chains face severe technical challenges, especially regarding security and privacy. In this work, we consolidate studies from supply chain management, information systems, and computer science from 2010--2021 in an interdisciplinary meta-survey to make this topic holistically accessible to interdisciplinary research. In particular, we identify a significant potential for computer scientists to remedy technical challenges and improve the robustness of information flows. We subsequently present a concise information flow-focused taxonomy for supply chains before discussing future research directions to provide possible entry points.}, keywords = {information flows; data communication; supply chain management; data security; data sharing; systematic literature review}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-pennekamp-supply-chain-survey.pdf}, publisher = {ACM}, ISSN = {0360-0300}, DOI = {10.1145/3606693}, reviewed = {1}, author = {Pennekamp, Jan and Matzutt, Roman and Klinkm{\"u}ller, Christopher and Bader, Lennart and Serror, Martin and Wagner, Eric and Malik, Sidra and Spi{\ss}, Maria and Rahn, Jessica and G{\"u}rpinar, Tan and Vlad, Eduard and Leemans, Sander J. J. and Kanhere, Salil S. and Stich, Volker and Wehrle, Klaus} } @Article { 2024_pennekamp_supply-chain-sensing, title = {Securing Sensing in Supply Chains: Opportunities, Building Blocks, and Designs}, journal = {IEEE Access}, year = {2024}, month = {1}, day = {8}, volume = {12}, pages = {9350-9368}, abstract = {Supply chains increasingly develop toward complex networks, both technically in terms of devices and connectivity, and also anthropogenic with a growing number of actors. The lack of mutual trust in such networks results in challenges that are exacerbated by stringent requirements for shipping conditions or quality, and where actors may attempt to reduce costs or cover up incidents. In this paper, we develop and comprehensively study four scenarios that eventually lead to end-to-end-secured sensing in complex IoT-based supply chains with many mutually distrusting actors, while highlighting relevant pitfalls and challenges—details that are still missing in related work. Our designs ensure that sensed data is securely transmitted and stored, and can be verified by all parties. To prove practical feasibility, we evaluate the most elaborate design with regard to performance, cost, deployment, and also trust implications on the basis of prevalent (mis)use cases. Our work enables a notion of secure end-to-end sensing with minimal trust across the system stack, even for complex and opaque supply chain networks.}, keywords = {blockchain technology; reliability; security; trust management; trusted computing; trusted execution environments}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2024/2024-pennekamp-secure-sensing.pdf}, ISSN = {2169-3536}, DOI = {10.1109/ACCESS.2024.3350778}, reviewed = {1}, author = {Pennekamp, Jan and Alder, Fritz and Bader, Lennart and Scopelliti, Gianluca and Wehrle, Klaus and M{\"u}hlberg, Jan Tobias} } @Inproceedings { 2024-dahlmanns-fps, title = {Collectively Enhancing IoT Security: A Privacy-Aware Crowd-Sourcing Approach}, year = {2024}, volume = {14551}, abstract = {Security configurations remain challenging for trained administrators. Nowadays, due to the advent of the Internet of Things (IoT), untrained users operate numerous and heterogeneous Internet-facing services in manifold use case-specific scenarios. In this work, we close the growing gap between the complexity of IoT security configuration and the expertise of the affected users. To this end, we propose ColPSA, a platform for collective and privacy-aware security advice that allows users to optimize their configuration by exchanging information about what security can be realized given their IoT deployment and scenario.}, editor = {Mohamed Mosbah, Florence S{\`e}des, Nadia Tawbi, Toufik Ahmed, Nora Boulahia-Cuppens, Joaquin Garcia-Alfaro}, publisher = {Springer Cham}, series = {Lecture Notes in Computer Science}, booktitle = {Proceedings of the 16th International Symposium on Foundations and Practice of Security (FPS '23), December 11-13, 2023, Bordeaux, France}, event_place = {Bordeaux, France}, event_name = {International Symposium on Foundations and Practice of Security 2023 (FPS 23)}, event_date = {December 11-13, 2023}, DOI = {10.1007/978-3-031-57540-2_2}, reviewed = {1}, author = {Dahlmanns, Markus and Matzutt, Roman and Dax, Chris and Wehrle, Klaus} } @Inproceedings { 2023_lohmoeller_transparency, title = {Poster: Bridging Trust Gaps: Data Usage Transparency in Federated Data Ecosystems}, year = {2023}, month = {11}, day = {27}, keywords = {data usage control; data ecosystems; transparency logs}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-lohmoeller-transparency.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 2023 ACM SIGSAC Conference on Computer and Communications Security (CCS ’23), November 26-30, 2023, Copenhagen, Denmark}, event_place = {Copenhagen, Denmark}, event_date = {November 26-30, 2023}, ISBN = {979-8-4007-0050-7/23/11}, DOI = {10.1145/3576915.3624371}, reviewed = {1}, author = {Lohm{\"o}ller, Johannes and Vlad, Eduard and Dahlmanns, Markus and Wehrle, Klaus} } @Inproceedings { 2023_matzutt_street_problems, title = {Poster: Accountable Processing of Reported Street Problems}, year = {2023}, month = {11}, day = {27}, pages = {3591-3593}, abstract = {Municipalities increasingly depend on citizens to file digital reports about issues such as potholes or illegal trash dumps to improve their response time. However, the responsible authorities may be incentivized to ignore certain reports, e.g., when addressing them inflicts high costs. In this work, we explore the applicability of blockchain technology to hold authorities accountable regarding filed reports. Our initial assessment indicates that our approach can be extended to benefit citizens and authorities in the future.}, keywords = {street problems; accountability; consortium blockchain; privacy}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-matzutt-street-problems.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 2023 ACM SIGSAC Conference on Computer and Communications Security (CCS ’23), November 26-30, 2023, Copenhagen, Denmark}, event_place = {Copenhagen, Denmark}, event_date = {November 26-30, 2023}, ISBN = {979-8-4007-0050-7/23/11}, DOI = {10.1145/3576915.3624367}, reviewed = {1}, author = {Matzutt, Roman and Pennekamp, Jan and Wehrle, Klaus} } @Inproceedings { 2023_sloun_accessibility, title = {Poster: Vulcan - Repurposing Accessibility Features for Behavior-based Intrusion Detection Dataset Generation}, year = {2023}, month = {11}, day = {27}, pages = {3543-3545}, abstract = {The generation of datasets is one of the most promising approaches to collecting the necessary behavior data to train machine learning models for host-based intrusion detection. While various dataset generation methods have been proposed, they are often limited and either only generate network traffic or are restricted to a narrow subset of applications. We present Vulcan, a preliminary framework that uses accessibility features to generate datasets by simulating user interactions for an extendable set of applications. It uses behavior profiles that define realistic user behavior and facilitate dataset updates upon changes in software versions, thus reducing the effort required to keep a dataset relevant. Preliminary results show that using accessibility features presents a promising approach to improving the quality of datasets in the HIDS domain.}, keywords = {Intrusion Detection, Dataset Generation, Accessibility Features}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-sloun-vulcan-accessibility.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 2023 ACM SIGSAC Conference on Computer and Communications Security (CCS '23), November 26-30, 2023, Copenhagen, Denmark}, event_place = {Copenhagen, Denmark}, event_date = {November 26-30, 2023}, ISBN = {979-8-4007-0050-7/23/11}, DOI = {10.1145/3576915.3624404}, reviewed = {1}, author = {van Sloun, Christian and Wehrle, Klaus} } @Article { 2023_pennekamp_purchase_inquiries, title = {Offering Two-Way Privacy for Evolved Purchase Inquiries}, journal = {ACM Transactions on Internet Technology}, year = {2023}, month = {11}, day = {17}, volume = {23}, number = {4}, abstract = {Dynamic and flexible business relationships are expected to become more important in the future to accommodate specialized change requests or small-batch production. Today, buyers and sellers must disclose sensitive information on products upfront before the actual manufacturing. However, without a trust relation, this situation is precarious for the involved companies as they fear for their competitiveness. Related work overlooks this issue so far: Existing approaches only protect the information of a single party only, hindering dynamic and on-demand business relationships. To account for the corresponding research gap of inadequately privacy-protected information and to deal with companies without an established trust relation, we pursue the direction of innovative privacy-preserving purchase inquiries that seamlessly integrate into today's established supplier management and procurement processes. Utilizing well-established building blocks from private computing, such as private set intersection and homomorphic encryption, we propose two designs with slightly different privacy and performance implications to securely realize purchase inquiries over the Internet. In particular, we allow buyers to consider more potential sellers without sharing sensitive information and relieve sellers of the burden of repeatedly preparing elaborate yet discarded offers. We demonstrate our approaches' scalability using two real-world use cases from the domain of production technology. Overall, we present deployable designs that offer two-way privacy for purchase inquiries and, in turn, fill a gap that currently hinders establishing dynamic and flexible business relationships. In the future, we expect significantly increasing research activity in this overlooked area to address the needs of an evolving production landscape.}, keywords = {bootstrapping procurement; secure industrial collaboration; private set intersection; homomorphic encryption; Internet of Production}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-pennekamp-purchase-inquiries.pdf}, publisher = {ACM}, ISSN = {1533-5399}, DOI = {10.1145/3599968}, reviewed = {1}, author = {Pennekamp, Jan and Dahlmanns, Markus and Fuhrmann, Frederik and Heutmann, Timo and Kreppein, Alexander and Grunert, Dennis and Lange, Christoph and Schmitt, Robert H. and Wehrle, Klaus} } @Inproceedings { 2023_bader_reputation-systems, title = {Reputation Systems for Supply Chains: The Challenge of Achieving Privacy Preservation}, year = {2023}, month = {11}, day = {16}, pages = {464-475}, abstract = {Consumers frequently interact with reputation systems to rate products, services, and deliveries. While past research extensively studied different conceptual approaches to realize such systems securely and privacy-preservingly, these concepts are not yet in use in business-to-business environments. In this paper, (1) we thus outline which specific challenges privacy-cautious stakeholders in volatile supply chain networks introduce, (2) give an overview of the diverse landscape of privacy-preserving reputation systems and their properties, and (3) based on well-established concepts from supply chain information systems and cryptography, we further propose an initial concept that accounts for the aforementioned challenges by utilizing fully homomorphic encryption. For future work, we identify the need of evaluating whether novel systems address the supply chain-specific privacy and confidentiality needs.}, note = {Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering (LNICST), Volume 593}, keywords = {SCM; confidentiality; anonymity; voter; votee; FHE}, tags = {internet-of-production}, url = {https://jpennekamp.de/wp-content/papercite-data/pdf/bpt+23.pdf}, publisher = {Springer}, booktitle = {Proceedings of the 20th EAI International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services (MobiQuitous '23), November 14-17, 2023, Melbourne, VIC, Australia}, event_place = {Melbourne, VIC, Australia}, event_date = {November 14-17, 2023}, ISBN = {978-3-031-63988-3}, ISSN = {1867-8211}, DOI = {10.1007/978-3-031-63989-0_24}, reviewed = {1}, author = {Bader, Lennart and Pennekamp, Jan and Thevaraj, Emildeon and Spi{\ss}, Maria and Kanhere, Salil S. and Wehrle, Klaus} } @Article { 2023_lamberts_metrics-sok, title = {SoK: Evaluations in Industrial Intrusion Detection Research}, journal = {Journal of Systems Research}, year = {2023}, month = {10}, day = {31}, volume = {3}, number = {1}, abstract = {Industrial systems are increasingly threatened by cyberattacks with potentially disastrous consequences. To counter such attacks, industrial intrusion detection systems strive to timely uncover even the most sophisticated breaches. Due to its criticality for society, this fast-growing field attracts researchers from diverse backgrounds, resulting in 130 new detection approaches in 2021 alone. This huge momentum facilitates the exploration of diverse promising paths but likewise risks fragmenting the research landscape and burying promising progress. Consequently, it needs sound and comprehensible evaluations to mitigate this risk and catalyze efforts into sustainable scientific progress with real-world applicability. In this paper, we therefore systematically analyze the evaluation methodologies of this field to understand the current state of industrial intrusion detection research. Our analysis of 609 publications shows that the rapid growth of this research field has positive and negative consequences. While we observe an increased use of public datasets, publications still only evaluate 1.3 datasets on average, and frequently used benchmarking metrics are ambiguous. At the same time, the adoption of newly developed benchmarking metrics sees little advancement. Finally, our systematic analysis enables us to provide actionable recommendations for all actors involved and thus bring the entire research field forward.}, tags = {internet-of-production, rfc}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-lamberts-metrics-sok.pdf}, publisher = {eScholarship Publishing}, ISSN = {2770-5501}, DOI = {10.5070/SR33162445}, reviewed = {1}, author = {Lamberts, Olav and Wolsing, Konrad and Wagner, Eric and Pennekamp, Jan and Bauer, Jan and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2023-redefine-mpc-cosimulation, title = {Delay-aware Model Predictive Control for Fast Frequency Control}, journal = {Proceedings of the 14th IEEE International Conference on Smart Grid Communications (SmartGridComm 2023)}, year = {2023}, month = {10}, tags = {redefine}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-heins-mpc-for-ffc.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 14th IEEE International Conference on Smart Grid Communications (SmartGridComm 2023)}, DOI = {10.1109/SmartGridComm57358.2023.10333921}, reviewed = {1}, author = {Heins, Tobias and Glebke, Ren{\'e} and Stoffers, Mirko and Gurumurthy, Sriram and Heesemann, Jan and Josevski, Martina and Monti, Antonello and Wehrle, Klaus} } @Inproceedings { 2023-kunze-spin-bit-in-the-wild, title = {Does It Spin? On the Adoption and Use of QUIC’s Spin Bit}, year = {2023}, month = {10}, tags = {legato}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-kunze-spin-bit-in-the-wild.pdf}, publisher = {ACM}, booktitle = {Proceedings of the Internet Measurement Conference (IMC '23)}, event_name = {Internet Measurement Conference 2023}, DOI = {10.1145/3618257.3624844}, reviewed = {1}, author = {Kunze, Ike and Sander, Constantin and Wehrle, Klaus} } @Inproceedings { 2023-sander-quic-ecn, title = {ECN with QUIC: Challenges in the Wild}, year = {2023}, month = {10}, tags = {legato}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-sander-quic-ecn.pdf}, web_url = {https://arxiv.org/abs/2309.14273}, publisher = {ACM}, booktitle = {Proceedings of the Internet Measurement Conference (IMC '23)}, event_name = {Internet Measurement Conference 2023}, ISBN = {979-8-4007-0382-9/23/10}, DOI = {10.1145/3618257.3624821}, reviewed = {1}, author = {Sander, Constantin and Kunze, Ike and Bl{\"o}cher, Leo and Kosek, Mike and Wehrle, Klaus} } @Inproceedings { 2023-wagner-lcn-repel, title = {Retrofitting Integrity Protection into Unused Header Fields of Legacy Industrial Protocols}, year = {2023}, month = {10}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-wagner-repel.pdf}, publisher = {IEEE}, booktitle = {48th IEEE Conference on Local Computer Networks (LCN), Daytona Beach, Florida, US}, event_place = {Daytona Beach, Florida, US}, event_name = {IEEE Conference on Local Computer Networks (LCN)}, event_date = {Oktober 1-5, 2023}, state = {accepted}, language = {en}, reviewed = {1}, author = {Wagner, Eric and Rothaug, Nils and Wolsing, Konrad and Bader, Lennart and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2023_wolsing_ensemble, title = {One IDS is not Enough! Exploring Ensemble Learning for Industrial Intrusion Detection}, year = {2023}, month = {9}, day = {25}, volume = {14345}, pages = {102-122}, abstract = {Industrial Intrusion Detection Systems (IIDSs) play a critical role in safeguarding Industrial Control Systems (ICSs) against targeted cyberattacks. Unsupervised anomaly detectors, capable of learning the expected behavior of physical processes, have proven effective in detecting even novel cyberattacks. While offering decent attack detection, these systems, however, still suffer from too many False-Positive Alarms (FPAs) that operators need to investigate, eventually leading to alarm fatigue. To address this issue, in this paper, we challenge the notion of relying on a single IIDS and explore the benefits of combining multiple IIDSs. To this end, we examine the concept of ensemble learning, where a collection of classifiers (IIDSs in our case) are combined to optimize attack detection and reduce FPAs. While training ensembles for supervised classifiers is relatively straightforward, retaining the unsupervised nature of IIDSs proves challenging. In that regard, novel time-aware ensemble methods that incorporate temporal correlations between alerts and transfer-learning to best utilize the scarce training data constitute viable solutions. By combining diverse IIDSs, the detection performance can be improved beyond the individual approaches with close to no FPAs, resulting in a promising path for strengthening ICS cybersecurity.}, note = {Lecture Notes in Computer Science (LNCS), Volume 14345}, keywords = {Intrusion Detection; Ensemble Learning; ICS}, tags = {internet-of-production, rfc}, url = {https://jpennekamp.de/wp-content/papercite-data/pdf/wkw+23.pdf}, publisher = {Springer}, booktitle = {Proceedings of the 28th European Symposium on Research in Computer Security (ESORICS '23), September 25-29, 2023, The Hague, The Netherlands}, event_place = {The Hague, The Netherlands}, event_name = {28th European Symposium on Research in Computer Security (ESORICS '23)}, event_date = {September 25-29, 2023}, ISBN = {978-3-031-51475-3}, ISSN = {0302-9743}, DOI = {10.1007/978-3-031-51476-0_6}, reviewed = {1}, author = {Wolsing, Konrad and Kus, Dominik and Wagner, Eric and Pennekamp, Jan and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2023_bodenbenner_fairsensor, title = {FAIR Sensor Ecosystem: Long-Term (Re-)Usability of FAIR Sensor Data through Contextualization}, year = {2023}, month = {7}, day = {20}, abstract = {The long-term utility and reusability of measurement data from production processes depend on the appropriate contextualization of the measured values. These requirements further mandate that modifications to the context need to be recorded. To be (re-)used at all, the data must be easily findable in the first place, which requires arbitrary filtering and searching routines. Following the FAIR guiding principles, fostering findable, accessible, interoperable and reusable (FAIR) data, in this paper, the FAIR Sensor Ecosystem is proposed, which provides a contextualization middleware based on a unified data metamodel. All information and relations which might change over time are versioned and associated with temporal validity intervals to enable full reconstruction of a system's state at any point in time. A technical validation demonstrates the correctness of the FAIR Sensor Ecosystem, including its contextualization model and filtering techniques. State-of-the-art FAIRness assessment frameworks rate the proposed FAIR Sensor Ecosystem with an average FAIRness of 71\%. The obtained rating can be considered remarkable, as deductions mainly result from the lack of fully appropriate FAIRness metrics and the absence of relevant community standards for the domain of the manufacturing industry.}, keywords = {FAIR Data; Cyber-Physical Systems; Data Management; Data Contextualization; Internet of Production}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-bodenbenner-fair-ecosystem.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 21th IEEE International Conference on Industrial Informatics (INDIN '23), July 17-20, 2023, Lemgo, Germany}, event_place = {Lemgo, Germany}, event_date = {July 17-20, 2023}, ISBN = {978-1-6654-9313-0}, ISSN = {2378-363X}, DOI = {10.1109/INDIN51400.2023.10218149}, reviewed = {1}, author = {Bodenbenner, Matthias and Pennekamp, Jan and Montavon, Benjamin and Wehrle, Klaus and Schmitt, Robert H.} } @Inproceedings { 2023-dahlmanns-docker, title = {Secrets Revealed in Container Images: An Internet-wide Study on Occurrence and Impact}, year = {2023}, month = {7}, day = {10}, pages = {797-811}, abstract = {Containerization allows bundling applications and their dependencies into a single image. The containerization framework Docker eases the use of this concept and enables sharing images publicly, gaining high momentum. However, it can lead to users creating and sharing images that include private keys or API secrets—either by mistake or out of negligence. This leakage impairs the creator's security and that of everyone using the image. Yet, the extent of this practice and how to counteract it remains unclear. In this paper, we analyze 337,171 images from Docker Hub and 8,076 other private registries unveiling that 8.5\% of images indeed include secrets. Specifically, we find 52,107 private keys and 3,158 leaked API secrets, both opening a large attack surface, i.e., putting authentication and confidentiality of privacy-sensitive data at stake and even allow active attacks. We further document that those leaked keys are used in the wild: While we discovered 1,060 certificates relying on compromised keys being issued by public certificate authorities, based on further active Internet measurements, we find 275,269 TLS and SSH hosts using leaked private keys for authentication. To counteract this issue, we discuss how our methodology can be used to prevent secret leakage and reuse.}, keywords = {network security; security configuration; secret leakage; container}, tags = {ven2us, internet-of-production,}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-dahlmanns-asiaccs.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 2023 ACM Asia Conference on Computer and Communications Security (ASIACCS '23), July 10-14, 2023, Melbourne, VIC, Australia}, event_place = {Melbourne, VIC, Australia}, event_name = {ASIA CCS '23}, event_date = {July 10-14, 2023}, ISBN = {979-8-4007-0098-9/23/07}, DOI = {10.1145/3579856.3590329}, reviewed = {1}, author = {Dahlmanns, Markus and Sander, Constantin and Decker, Robin and Wehrle, Klaus} } @Inproceedings { 2023_pennekamp_benchmarking_comparison, title = {Designing Secure and Privacy-Preserving Information Systems for Industry Benchmarking}, year = {2023}, month = {6}, day = {15}, volume = {13901}, pages = {489-505}, abstract = {Benchmarking is an essential tool for industrial organizations to identify potentials that allows them to improve their competitive position through operational and strategic means. However, the handling of sensitive information, in terms of (i) internal company data and (ii) the underlying algorithm to compute the benchmark, demands strict (technical) confidentiality guarantees—an aspect that existing approaches fail to address adequately. Still, advances in private computing provide us with building blocks to reliably secure even complex computations and their inputs, as present in industry benchmarks. In this paper, we thus compare two promising and fundamentally different concepts (hardware- and software-based) to realize privacy-preserving benchmarks. Thereby, we provide detailed insights into the concept-specific benefits. Our evaluation of two real-world use cases from different industries underlines that realizing and deploying secure information systems for industry benchmarking is possible with today's building blocks from private computing.}, note = {Lecture Notes in Computer Science (LNCS), Volume 13901}, keywords = {real-world computing; trusted execution environments; homomorphic encryption; key performance indicators; benchmarking}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-pennekamp-industry-benchmarking.pdf}, publisher = {Springer}, booktitle = {Proceedings of the 35th International Conference on Advanced Information Systems Engineering (CAiSE '23), June 12-16, 2023, Zaragoza, Spain}, event_place = {Zaragoza, Spain}, event_name = {35th International Conference on Advanced Information Systems Engineering (CAiSE '23)}, event_date = {June 12-16, 2023}, ISBN = {978-3-031-34559-3}, ISSN = {0302-9743}, DOI = {10.1007/978-3-031-34560-9_29}, reviewed = {1}, author = {Pennekamp, Jan and Lohm{\"o}ller, Johannes and Vlad, Eduard and Loos, Joscha and Rodemann, Niklas and Sapel, Patrick and Fink, Ina Berenice and Schmitz, Seth and Hopmann, Christian and Jarke, Matthias and Schuh, G{\"u}nther and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2023-grote-mvca-fairness, title = {Instant Messaging Meets Video Conferencing: Studying the Performance of IM Video Calls}, year = {2023}, month = {6}, tags = {legato}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-grote-mvca-fairness.pdf}, publisher = {IFIP/IEEE}, booktitle = {Proceedings of the Network Traffic Measurement and Analysis Conference (TMA '23)}, ISBN = {978-3-903176-58-4}, DOI = {10.23919/TMA58422.2023.10199019}, reviewed = {1}, author = {Grote, Laurenz and Kunze, Ike and Sander, Constantin and Wehrle, Klaus} } @Article { 2023-circres-wu-comp-ecosystem, title = {Use of Computation Ecosystems to Analyze the Kidney-Heart Crosstalk}, journal = {Circulation research}, year = {2023}, month = {4}, day = {14}, volume = {132}, number = {8}, pages = {1084-1100}, abstract = {The identification of mediators for physiologic processes, correlation of molecular processes, or even pathophysiological processes within a single organ such as the kidney or heart has been extensively studied to answer specific research questions using organ-centered approaches in the past 50 years. However, it has become evident that these approaches do not adequately complement each other and display a distorted single-disease progression, lacking holistic multilevel/multidimensional correlations. Holistic approaches have become increasingly significant in understanding and uncovering high dimensional interactions and molecular overlaps between different organ systems in the pathophysiology of multimorbid and systemic diseases like cardiorenal syndrome because of pathological heart-kidney crosstalk. Holistic approaches to unraveling multimorbid diseases are based on the integration, merging, and correlation of extensive, heterogeneous, and multidimensional data from different data sources, both -omics and nonomics databases. These approaches aimed at generating viable and translatable disease models using mathematical, statistical, and computational tools, thereby creating first computational ecosystems. As part of these computational ecosystems, systems medicine solutions focus on the analysis of -omics data in single-organ diseases. However, the data–scientific requirements to address the complexity of multimodality and multimorbidity reach far beyond what is currently available and require multiphased and cross-sectional approaches. These approaches break down complexity into small and comprehensible challenges. Such holistic computational ecosystems encompass data, methods, processes, and interdisciplinary knowledge to manage the complexity of multiorgan crosstalk. Therefore, this review summarizes the current knowledge of kidney-heart crosstalk, along with methods and opportunities that arise from the novel application of computational ecosystems providing a holistic analysis on the example of kidney-heart crosstalk.}, keywords = {disease progression; ecosystem; heart; kidney; multimorbidity}, tags = {coat-ers}, misc2 = {Online}, language = {en}, DOI = {10.1161/CIRCRESAHA.123.321765}, reviewed = {1}, author = {Wu, Zhuojun and Lohm{\"o}ller, Johannes and Kuhl, Christiane and Wehrle, Klaus and Jankowski, Joachim} } @Incollection { 2023_pennekamp_crd-a.i, title = {Evolving the Digital Industrial Infrastructure for Production: Steps Taken and the Road Ahead}, year = {2023}, month = {2}, day = {8}, pages = {35-60}, abstract = {The Internet of Production (IoP) leverages concepts such as digital shadows, data lakes, and a World Wide Lab (WWL) to advance today’s production. Consequently, it requires a technical infrastructure that can support the agile deployment of these concepts and corresponding high-level applications, which, e.g., demand the processing of massive data in motion and at rest. As such, key research aspects are the support for low-latency control loops, concepts on scalable data stream processing, deployable information security, and semantically rich and efficient long-term storage. In particular, such an infrastructure cannot continue to be limited to machines and sensors, but additionally needs to encompass networked environments: production cells, edge computing, and location-independent cloud infrastructures. Finally, in light of the envisioned WWL, i.e., the interconnection of production sites, the technical infrastructure must be advanced to support secure and privacy-preserving industrial collaboration. To evolve today’s production sites and lay the infrastructural foundation for the IoP, we identify five broad streams of research: (1) adapting data and stream processing to heterogeneous data from distributed sources, (2) ensuring data interoperability between systems and production sites, (3) exchanging and sharing data with different stakeholders, (4) network security approaches addressing the risks of increasing interconnectivity, and (5) security architectures to enable secure and privacy-preserving industrial collaboration. With our research, we evolve the underlying infrastructure from isolated, sparsely networked production sites toward an architecture that supports high-level applications and sophisticated digital shadows while facilitating the transition toward a WWL.}, keywords = {Cyber-physical production systems; Data streams; Industrial data processing; Industrial network security; Industrial data security; Secure industrial collaboration}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-pennekamp-iop-a.i.pdf}, publisher = {Springer}, series = {Interdisciplinary Excellence Accelerator Series}, booktitle = {Internet of Production: Fundamentals, Applications and Proceedings}, ISBN = {978-3-031-44496-8}, DOI = {10.1007/978-3-031-44497-5_2}, reviewed = {1}, author = {Pennekamp, Jan and Belova, Anastasiia and Bergs, Thomas and Bodenbenner, Matthias and B{\"u}hrig-Polaczek, Andreas and Dahlmanns, Markus and Kunze, Ike and Kr{\"o}ger, Moritz and Geisler, Sandra and Henze, Martin and L{\"u}tticke, Daniel and Montavon, Benjamin and Niemietz, Philipp and Ortjohann, Lucia and Rudack, Maximilian and Schmitt, Robert H. and Vroomen, Uwe and Wehrle, Klaus and Zeng, Michael} } @Incollection { 2023_rueppel_crd-b2.ii, title = {Model-Based Controlling Approaches for Manufacturing Processes}, year = {2023}, month = {2}, day = {8}, pages = {221-246}, abstract = {The main objectives in production technology are quality assurance, cost reduction, and guaranteed process safety and stability. Digital shadows enable a more comprehensive understanding and monitoring of processes on shop floor level. Thus, process information becomes available between decision levels, and the aforementioned criteria regarding quality, cost, or safety can be included in control decisions for production processes. The contextual data for digital shadows typically arises from heterogeneous sources. At shop floor level, the proximity to the process requires usage of available data as well as domain knowledge. Data sources need to be selected, synchronized, and processed. Especially high-frequency data requires algorithms for intelligent distribution and efficient filtering of the main information using real-time devices and in-network computing. Real-time data is enriched by simulations, metadata from product planning, and information across the whole process chain. Well-established analytical and empirical models serve as the base for new hybrid, gray box approaches. These models are then applied to optimize production process control by maximizing the productivity under given quality and safety constraints. To store and reuse the developed models, ontologies are developed and a data lake infrastructure is utilized and constantly enlarged laying the basis for a World Wide Lab (WWL). Finally, closing the control loop requires efficient quality assessment, immediately after the process and directly on the machine. This chapter addresses works in a connected job shop to acquire data, identify and optimize models, and automate systems and their deployment in the Internet of Production (IoP).}, keywords = {Process control; Model-based control; Data aggregation; Model identification; Model optimization}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-rueppel-iop-b2.i.pdf}, publisher = {Springer}, series = {Interdisciplinary Excellence Accelerator Series}, booktitle = {Internet of Production: Fundamentals, Applications and Proceedings}, ISBN = {978-3-031-44496-8}, DOI = {10.1007/978-3-031-44497-5_7}, reviewed = {1}, author = {R{\"u}ppel, Adrian Karl and Ay, Muzaffer and Biernat, Benedikt and Kunze, Ike and Landwehr, Markus and Mann, Samuel and Pennekamp, Jan and Rabe, Pascal and Sanders, Mark P. and Scheurenberg, Dominik and Schiller, Sven and Xi, Tiandong and Abel, Dirk and Bergs, Thomas and Brecher, Christian and Reisgen, Uwe and Schmitt, Robert H. and Wehrle, Klaus} } @Incollection { 2023_klugewilkes_crd-b2.iv, title = {Modular Control and Services to Operate Line-less Mobile Assembly Systems}, year = {2023}, month = {2}, day = {8}, pages = {303-328}, abstract = {The increasing product variability and lack of skilled workers demand for autonomous, flexible production. Since assembly is considered a main cost driver and accounts for a major part of production time, research focuses on new technologies in assembly. The paradigm of Line-less Mobile Assembly Systems (LMAS) provides a solution for the future of assembly by mobilizing all resources. Thus, dynamic product routes through spatiotemporally configured assembly stations on a shop floor free of fixed obstacles are enabled. In this chapter, we present research focal points on different levels of LMAS, starting with the macroscopic level of formation planning, followed by the mesoscopic level of mobile robot control and multipurpose input devices and the microscopic level of services, such as interpreting autonomous decisions and in-network computing. We provide cross-level data and knowledge transfer through a novel ontology-based knowledge management. Overall, our work contributes to future safe and predictable human-robot collaboration in dynamic LMAS stations based on accurate online formation and motion planning of mobile robots, novel human-machine interfaces and networking technologies, as well as trustworthy AI-based decisions.}, keywords = {Lineless mobile assembly systems (LMAS); Formation planning; Online motion planning; In-network computing; Interpretable AI; Human-machine collaboration; Ontology-based knowledge management}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2023/2023-klugewilkes-iop-b2.iv.pdf}, publisher = {Springer}, series = {Interdisciplinary Excellence Accelerator Series}, booktitle = {Internet of Production: Fundamentals, Applications and Proceedings}, ISBN = {978-3-031-44496-8}, DOI = {10.1007/978-3-031-44497-5_13}, reviewed = {1}, author = {Kluge-Wilkes, Aline and Baier, Ralph and Gossen, Daniel and Kunze, Ike and M{\"u}ller, Aleksandra and Shahidi, Amir and Wolfschl{\"a}ger, Dominik and Brecher, Christian and Corves, Burkhard and H{\"u}sing, Mathias and Nitsch, Verena and Schmitt, Robert H. and Wehrle, Klaus} } @Inproceedings { 2023-lorz-cired, title = {Interconnected grid protection systems - reference grid for testing an adaptive protection scheme}, year = {2023}, pages = {3286-3290}, tags = {ven2us}, booktitle = {27th International Conference on Electricity Distribution (CIRED 2023), Rome, Italy, June 12-15, 2023}, event_place = {Rome, Italy}, event_name = {International Conference \& Exhibition on Electricity Distribution (CIRED)}, event_date = {June 12-15, 2023}, DOI = {10.1049/icp.2023.0864}, reviewed = {1}, author = {Lorz, Tobias and Jaeger, Johann and Selimaj, Antigona and Hacker, Immanuel and Ulbig, Andreas and Heckel, Jan-Peter and Becker, Christian and Dahlmanns, Markus and Fink, Ina Berenice and Wehrle, Klaus and Erichsen, Gerrit and Schindler, Michael and Luxenburger, Rainer and Lin, Guosong} } @Inproceedings { 2022_kus_ensemble, title = {Poster: Ensemble Learning for Industrial Intrusion Detection}, year = {2022}, month = {12}, day = {8}, number = {RWTH-2022-10809}, abstract = {Industrial intrusion detection promises to protect networked industrial control systems by monitoring them and raising an alarm in case of suspicious behavior. Many monolithic intrusion detection systems are proposed in literature. These detectors are often specialized and, thus, work particularly well on certain types of attacks or monitor different parts of the system, e.g., the network or the physical process. Combining multiple such systems promises to leverage their joint strengths, allowing the detection of a wider range of attacks due to their diverse specializations and reducing false positives. We study this concept's feasibility with initial results of various methods to combine detectors.}, tags = {rfc}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-kus-ensemble-poster.pdf}, publisher = {RWTH Aachen University}, booktitle = {38th Annual Computer Security Applications Conference (ACSAC '22), December 5-9, 2022, Austin, TX, USA}, institution = {RWTH Aachen University}, event_place = {Austin, TX, USA}, event_name = {38th Annual Computer Security Applications Conference (ACSAC '22)}, event_date = {December 5-9, 2022}, DOI = {10.18154/RWTH-2022-10809}, reviewed = {1}, author = {Kus, Dominik and Wolsing, Konrad and Pennekamp, Jan and Wagner, Eric and Henze, Martin and Wehrle, Klaus} } @Inproceedings { 2022_pennekamp_cumul, title = {CUMUL \& Co: High-Impact Artifacts for Website Fingerprinting Research}, year = {2022}, month = {12}, day = {8}, number = {RWTH-2022-10811}, abstract = {Anonymous communication on the Internet is about hiding the relationship between communicating parties. At NDSS '16, we presented a new website fingerprinting approach, CUMUL, that utilizes novel features and a simple yet powerful algorithm to attack anonymization networks such as Tor. Based on pattern observation of data flows, this attack aims at identifying the content of encrypted and anonymized connections. Apart from the feature generation and the used classifier, we also provided a large dataset to the research community to study the attack at Internet scale. In this paper, we emphasize the impact of our artifacts by analyzing publications referring to our work with respect to the dataset, feature extraction method, and source code of the implementation. Based on this data, we draw conclusions about the impact of our artifacts on the research field and discuss their influence on related cybersecurity topics. Overall, from 393 unique citations, we discover more than 130 academic references that utilize our artifacts, 61 among them are highly influential (according to SemanticScholar), and at least 35 are from top-ranked security venues. This data underlines the significant relevance and impact of our work as well as of our artifacts in the community and beyond.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-pennekamp-cumul-artifacts.pdf}, web_url = {https://www.acsac.org/2022/program/artifacts_competition/}, publisher = {ACSA}, booktitle = {Cybersecurity Artifacts Competition and Impact Award at 38th Annual Computer Security Applications Conference (ACSAC '22), December 5-9, 2022, Austin, TX, USA}, event_place = {Austin, TX, USA}, event_name = {38th Annual Computer Security Applications Conference (ACSAC '22)}, event_date = {December 5-9, 2022}, DOI = {10.18154/RWTH-2022-10811}, reviewed = {1}, author = {Pennekamp, Jan and Henze, Martin and Zinnen, Andreas and Lanze, Fabian and Wehrle, Klaus and Panchenko, Andriy} } @Inproceedings { 2022-wireless-anycast, title = {Harnessing Cooperative Anycast Communication for Increased Resilience in Wireless Control}, journal = {Proceedings of the 61st IEEE Conference on Decision and Control (CDC 2022)}, year = {2022}, month = {12}, tags = {reflexes}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-glebke-wireless-anycast.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 61st IEEE Conference on Decision and Control (CDC 2022)}, DOI = {10.1109/CDC51059.2022.9992864}, reviewed = {1}, author = {Glebke, Ren{\'e} and Scheiper, Jan and Lenz, Stefan and Stoffers, Mirko and Wehrle, Klaus} } @Inproceedings { 2022-kunze-coin-transport, title = {Evolving the End-to-End Transport Layer in Times of Emerging Computing In The Network (COIN)}, year = {2022}, month = {11}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-kunze-coin-transport.pdf}, booktitle = {Proceedings of the 1st Workshop on New IP and Beyond, co-located with the 30th IEEE International Conference on Network Protocols}, event_place = {Lexington, Kentucky, USA}, event_name = {1st Workshop on New IP and Beyond, co-located with the 30th IEEE International Conference on Network Protocols}, event_date = {30 October, 2022}, DOI = {10.1109/ICNP55882.2022.9940379}, reviewed = {1}, author = {Kunze, Ike and Trossen, Dirk and Wehrle, Klaus} } @Inproceedings { 2022_lohmoeller_sovereignty, title = {On the Need for Strong Sovereignty in Data Ecosystems}, year = {2022}, month = {9}, day = {5}, volume = {3306}, pages = {51-63}, abstract = {Data ecosystems are the foundation of emerging data-driven business models as they (i) enable an automated exchange between their participants and (ii) provide them with access to huge and heterogeneous data sources. However, the corresponding benefits come with unforeseen risks as also sensitive information is potentially exposed. Consequently, data security is of utmost importance and, thus, a central requirement for the successful implementation of these ecosystems. Current initiatives, such as IDS and GAIA-X, hence foster sovereign participation via a federated infrastructure where participants retain local control. However, these designs place significant trust in remote infrastructure by mostly implementing organizational security measures such as certification processes prior to admission of a participant. At the same time, due to the sensitive nature of involved data, participants are incentivized to bypass security measures to maximize their own benefit: In practice, this issue significantly weakens sovereignty guarantees. In this paper, we hence claim that data ecosystems must be extended with technical means to reestablish such guarantees. To underpin our position, we analyze promising building blocks and identify three core research directions toward stronger data sovereignty, namely trusted remote policy enforcement, verifiable data tracking, and integration of resource-constrained participants. We conclude that these directions are critical to securely implement data ecosystems in data-sensitive contexts.}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-lohmoeller-deco.pdf}, publisher = {CEUR Workshop Proceedings}, booktitle = {Proceedings of the 1st International Workshop on Data Ecosystems (DEco '22), co-located with the 48th International Conference on Very Large Databases (VLDB '22), September 5-9, 2022, Sydney, Australia,}, event_place = {Sydney, Australia}, event_name = {International Workshop on Data Ecosystems (DEco '22)}, event_date = {September 5, 2022}, ISSN = {1613-0073}, reviewed = {1}, author = {Lohm{\"o}ller, Johannes and Pennekamp, Jan and Matzutt, Roman and Wehrle, Klaus} } @Article { 2022-henze-tii-prada, title = {Complying with Data Handling Requirements in Cloud Storage Systems}, journal = {IEEE Transactions on Cloud Computing}, year = {2022}, month = {9}, volume = {10}, number = {3}, pages = {1661-1674}, abstract = {In past years, cloud storage systems saw an enormous rise in usage. However, despite their popularity and importance as underlying infrastructure for more complex cloud services, today’s cloud storage systems do not account for compliance with regulatory, organizational, or contractual data handling requirements by design. Since legislation increasingly responds to rising data protection and privacy concerns, complying with data handling requirements becomes a crucial property for cloud storage systems. We present Prada , a practical approach to account for compliance with data handling requirements in key-value based cloud storage systems. To achieve this goal, Prada introduces a transparent data handling layer, which empowers clients to request specific data handling requirements and enables operators of cloud storage systems to comply with them. We implement Prada on top of the distributed database Cassandra and show in our evaluation that complying with data handling requirements in cloud storage systems is practical in real-world cloud deployments as used for microblogging, data sharing in the Internet of Things, and distributed email storage.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-henze-tii-prada.pdf}, misc2 = {Online}, language = {en}, ISSN = {2168-7161}, DOI = {10.1109/TCC.2020.3000336}, reviewed = {1}, author = {Henze, Martin and Matzutt, Roman and Hiller, Jens and M{\"u}hmer, Erik and Ziegeldorf, Jan Henrik and van der Giet, Johannes and Wehrle, Klaus} } @Proceedings { 2022-wolsing-radarsec, title = {Network Attacks Against Marine Radar Systems: A Taxonomy, Simulation Environment, and Dataset}, year = {2022}, month = {9}, tags = {rfc}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-wolsing-radar.pdf}, publisher = {IEEE}, event_place = {Edmonton, Canada}, event_name = {47th IEEE Conference on Local Computer Networks (LCN)}, event_date = {September 26-29, 2022}, DOI = {10.1109/LCN53696.2022.9843801}, reviewed = {1}, author = {Wolsing, Konrad and Saillard, Antoine and Bauer, Jan and Wagner, Eric and van Sloun, Christian and Fink, Ina Berenice and Schmidt, Mari and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2022-wolsing-simple, title = {Can Industrial Intrusion Detection Be SIMPLE?}, year = {2022}, month = {9}, volume = {978-3-031-17143-7}, pages = {574--594}, abstract = {Cyberattacks against industrial control systems pose a serious risk to the safety of humans and the environment. Industrial intrusion detection systems oppose this threat by continuously monitoring industrial processes and alerting any deviations from learned normal behavior. To this end, various streams of research rely on advanced and complex approaches, i.e., artificial neural networks, thus achieving allegedly high detection rates. However, as we show in an analysis of 70 approaches from related work, their inherent complexity comes with undesired properties. For example, they exhibit incomprehensible alarms and models only specialized personnel can understand, thus limiting their broad applicability in a heterogeneous industrial domain. Consequentially, we ask whether industrial intrusion detection indeed has to be complex or can be SIMPLE instead, i.e., Sufficient to detect most attacks, Independent of hyperparameters to dial-in, Meaningful in model and alerts, Portable to other industrial domains, Local to a part of the physical process, and computationally Efficient. To answer this question, we propose our design of four SIMPLE industrial intrusion detection systems, such as simple tests for the minima and maxima of process values or the rate at which process values change. Our evaluation of these SIMPLE approaches on four state-of-the-art industrial security datasets reveals that SIMPLE approaches can perform on par with existing complex approaches from related work while simultaneously being comprehensible and easily portable to other scenarios. Thus, it is indeed justified to raise the question of whether industrial intrusion detection needs to be inherently complex.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-wolsing-simple.pdf}, editor = {Atluri, Vijayalakshmi and Di Pietro, Roberto and Jensen, Christian D. and Meng, Weizhi}, publisher = {Springer Nature Switzerland}, booktitle = {Proceedings of the 27th European Symposium on Research in Computer Security (ESORICS '22), September 26-30, 2022, Copenhagen, Denmark}, event_place = {Copenhagen, Denmark}, event_name = {27th European Symposium on Research in Computer Security (ESORICS)}, event_date = {September 26-30, 2022}, DOI = {10.1007/978-3-031-17143-7_28}, reviewed = {1}, author = {Wolsing, Konrad and Thiemt, Lea and van Sloun, Christian and Wagner, Eric and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2022-sander-h3-prio-hol, title = {Analyzing the Influence of Resource Prioritization on HTTP/3 HOL Blocking and Performance}, year = {2022}, month = {6}, day = {27}, tags = {legato}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-sander-h3-prio-hol.pdf}, web_url2 = {https://tma.ifip.org/2022/wp-content/uploads/sites/11/2022/06/tma2022-paper28.pdf}, publisher = {IFIP}, booktitle = {Proceedings of the Network Traffic Measurement and Analysis Conference (TMA '22)}, event_place = {Enschede}, event_name = {Network Traffic Measurement and Analysis Conference}, event_date = {27.06.22-30.06.22}, ISBN = {978-3-903176-47-8}, reviewed = {1}, author = {Sander, Constantin and Kunze, Ike and Wehrle, Klaus} } @Inproceedings { 2022_dahlmanns_tlsiiot, title = {Missed Opportunities: Measuring the Untapped TLS Support in the Industrial Internet of Things}, year = {2022}, month = {5}, day = {31}, pages = {252-266}, abstract = {The ongoing trend to move industrial appliances from previously isolated networks to the Internet requires fundamental changes in security to uphold secure and safe operation. Consequently, to ensure end-to-end secure communication and authentication, (i) traditional industrial protocols, e.g., Modbus, are retrofitted with TLS support, and (ii) modern protocols, e.g., MQTT, are directly designed to use TLS. To understand whether these changes indeed lead to secure Industrial Internet of Things deployments, i.e., using TLS-based protocols, which are configured according to security best practices, we perform an Internet-wide security assessment of ten industrial protocols covering the complete IPv4 address space. Our results show that both, retrofitted existing protocols and newly developed secure alternatives, are barely noticeable in the wild. While we find that new protocols have a higher TLS adoption rate than traditional protocols (7.2 \% vs. 0.4 \%), the overall adoption of TLS is comparably low (6.5 \% of hosts). Thus, most industrial deployments (934,736 hosts) are insecurely connected to the Internet. Furthermore, we identify that 42 \% of hosts with TLS support (26,665 hosts) show security deficits, e.g., missing access control. Finally, we show that support in configuring systems securely, e.g., via configuration templates, is promising to strengthen security.}, keywords = {industrial communication; network security; security configuration}, tags = {internet-of-production, rfc}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-dahlmanns-asiaccs.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 2022 ACM Asia Conference on Computer and Communications Security (ASIACCS '22), May 30-June 3, 2022, Nagasaki, Japan}, event_place = {Nagasaki, Japan}, event_name = {ASIACCS '22}, event_date = {May 30-June 3, 2022}, ISBN = {978-1-4503-9140-5/22/05}, DOI = {10.1145/3488932.3497762}, reviewed = {1}, author = {Dahlmanns, Markus and Lohm{\"o}ller, Johannes and Pennekamp, Jan and Bodenhausen, J{\"o}rn and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2022_kus_iids_generalizability, title = {A False Sense of Security? Revisiting the State of Machine Learning-Based Industrial Intrusion Detection}, year = {2022}, month = {5}, day = {30}, pages = {73-84}, abstract = {Anomaly-based intrusion detection promises to detect novel or unknown attacks on industrial control systems by modeling expected system behavior and raising corresponding alarms for any deviations. As manually creating these behavioral models is tedious and error-prone, research focuses on machine learning to train them automatically, achieving detection rates upwards of 99 \%. However, these approaches are typically trained not only on benign traffic but also on attacks and then evaluated against the same type of attack used for training. Hence, their actual, real-world performance on unknown (not trained on) attacks remains unclear. In turn, the reported near-perfect detection rates of machine learning-based intrusion detection might create a false sense of security. To assess this situation and clarify the real potential of machine learning-based industrial intrusion detection, we develop an evaluation methodology and examine multiple approaches from literature for their performance on unknown attacks (excluded from training). Our results highlight an ineffectiveness in detecting unknown attacks, with detection rates dropping to between 3.2 \% and 14.7 \% for some types of attacks. Moving forward, we derive recommendations for further research on machine learning-based approaches to ensure clarity on their ability to detect unknown attacks.}, keywords = {anomaly detection; machine learning; industrial control system}, tags = {internet-of-production, rfc}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-kus-iids-generalizability.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 8th ACM Cyber-Physical System Security Workshop (CPSS '22), co-located with the 17th ACM ASIA Conference on Computer and Communications Security (ASIACCS '22), May 30-June 3, 2022, Nagasaki, Japan}, ISBN = {978-1-4503-9176-4/22/05}, DOI = {10.1145/3494107.3522773}, reviewed = {1}, author = {Kus, Dominik and Wagner, Eric and Pennekamp, Jan and Wolsing, Konrad and Fink, Ina Berenice and Dahlmanns, Markus and Wehrle, Klaus and Henze, Martin} } @Inproceedings { WagnerSWH2022, title = {BP-MAC: Fast Authentication for Short Messages}, year = {2022}, month = {5}, day = {18}, pages = {201-206}, url = {/fileadmin/papers/2022/2022-wagner-bpmac.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 15th ACM Conference on Security and Privacy in Wireless and Mobile Networks (WiSec '22)}, event_place = {San Antonio, Texas, USA}, event_name = {15th ACM Conference on Security and Privacy in Wireless and Mobile Networks (WiSec '22)}, ISBN = {978-1-4503-9216-7/22/05}, DOI = {10.1145/3507657.3528554}, reviewed = {1}, author = {Wagner, Eric and Serror, Martin and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2022_wagner_ccchain, title = {Scalable and Privacy-Focused Company-Centric Supply Chain Management}, year = {2022}, month = {5}, day = {4}, abstract = {Blockchain technology promises to overcome trust and privacy concerns inherent to centralized information sharing. However, current decentralized supply chain management systems do either not meet privacy and scalability requirements or require a trustworthy consortium, which is challenging for increasingly dynamic supply chains with constantly changing participants. In this paper, we propose CCChain, a scalable and privacy-aware supply chain management system that stores all information locally to give companies complete sovereignty over who accesses their data. Still, tamper protection of all data through a permissionless blockchain enables on-demand tracking and tracing of products as well as reliable information sharing while affording the detection of data inconsistencies. Our evaluation confirms that CCChain offers superior scalability in comparison to alternatives while also enabling near real-time tracking and tracing for many, less complex products.}, keywords = {supply chain management; blockchain; permissionless; deployment; tracing and tracking; privacy}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-wagner-ccchain.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 2022 IEEE International Conference on Blockchain and Cryptocurrency (ICBC '22), May 2-5, 2022, Shanghai, China}, event_place = {Shanghai, China}, event_date = {May 2-5, 2022}, ISBN = {978-1-6654-9538-7/22}, DOI = {10.1109/ICBC54727.2022.9805503}, reviewed = {1}, author = {Wagner, Eric and Matzutt, Roman and Pennekamp, Jan and Bader, Lennart and Bajelidze, Irakli and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2022_matzutt_redactchain, title = {A Moderation Framework for the Swift and Transparent Removal of Illicit Blockchain Content}, year = {2022}, month = {5}, day = {3}, abstract = {Blockchains gained tremendous attention for their capability to provide immutable and decentralized event ledgers that can facilitate interactions between mutually distrusting parties. However, precisely this immutability and the openness of permissionless blockchains raised concerns about the consequences of illicit content being irreversibly stored on them. Related work coined the notion of redactable blockchains, which allow for removing illicit content from their history without affecting the blockchain's integrity. While honest users can safely prune identified content, current approaches either create trust issues by empowering fixed third parties to rewrite history, cannot react quickly to reported content due to using lengthy public votings, or create large per-redaction overheads. In this paper, we instead propose to outsource redactions to small and periodically exchanged juries, whose members can only jointly redact transactions using chameleon hash functions and threshold cryptography. Multiple juries are active at the same time to swiftly redact reported content. They oversee their activities via a global redaction log, which provides transparency and allows for appealing and reversing a rogue jury's decisions. Hence, our approach establishes a framework for the swift and transparent moderation of blockchain content. Our evaluation shows that our moderation scheme can be realized with feasible per-block and per-redaction overheads, i.e., the redaction capabilities do not impede the blockchain's normal operation.}, keywords = {redactable blockchain; illicit content; chameleon hash functions; threshold cryptography}, tags = {mynedata; impact-digital; digital-campus}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-matzutt-redactchain.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 2022 IEEE International Conference on Blockchain and Cryptocurrency (ICBC '22), May 2-5, 2022, Shanghai, China}, event_place = {Shanghai, China}, event_date = {May 2-5, 2022}, ISBN = {978-1-6654-9538-7/22}, DOI = {10.1109/ICBC54727.2022.9805508}, reviewed = {1}, author = {Matzutt, Roman and Ahlrichs, Vincent and Pennekamp, Jan and Karwacik, Roman and Wehrle, Klaus} } @Article { 2022_brauner_iop, title = {A Computer Science Perspective on Digital Transformation in Production}, journal = {ACM Transactions on Internet of Things}, year = {2022}, month = {5}, day = {1}, volume = {3}, number = {2}, abstract = {The Industrial Internet-of-Things (IIoT) promises significant improvements for the manufacturing industry by facilitating the integration of manufacturing systems by Digital Twins. However, ecological and economic demands also require a cross-domain linkage of multiple scientific perspectives from material sciences, engineering, operations, business, and ergonomics, as optimization opportunities can be derived from any of these perspectives. To extend the IIoT to a true Internet of Production, two concepts are required: first, a complex, interrelated network of Digital Shadows which combine domain-specific models with data-driven AI methods; and second, the integration of a large number of research labs, engineering, and production sites as a World Wide Lab which offers controlled exchange of selected, innovation-relevant data even across company boundaries. In this article, we define the underlying Computer Science challenges implied by these novel concepts in four layers: Smart human interfaces provide access to information that has been generated by model-integrated AI. Given the large variety of manufacturing data, new data modeling techniques should enable efficient management of Digital Shadows, which is supported by an interconnected infrastructure. Based on a detailed analysis of these challenges, we derive a systematized research roadmap to make the vision of the Internet of Production a reality.}, keywords = {Internet of Production; World Wide Lab; Digital Shadows; Industrial Internet of Things}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-brauner-digital-transformation.pdf}, publisher = {ACM}, ISSN = {2691-1914}, DOI = {10.1145/3502265}, reviewed = {1}, author = {Brauner, Philipp and Dalibor, Manuela and Jarke, Matthias and Kunze, Ike and Koren, Istv{\'a}n and Lakemeyer, Gerhard and Liebenberg, Martin and Michael, Judith and Pennekamp, Jan and Quix, Christoph and Rumpe, Bernhard and van der Aalst, Wil and Wehrle, Klaus and Wortmann, Andreas and Ziefle, Martina} } @Techreport { draft-irtf-coinrg-use-cases-06, title = {Use Cases for In-Network Computing}, year = {2022}, month = {3}, number = {draft-irtf-coinrg-use-cases-06}, note = {expires: 8 September 2022 (work in progress)}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/draft-irtf-coinrg-use-cases-02.pdf}, web_url = {https://datatracker.ietf.org/doc/draft-irtf-coinrg-use-cases/}, misc2 = {Online}, publisher = {IETF Trust}, series = {Internet Drafts}, organization = {Internet Engineering Task Force}, institution = {Internet Engineering Task Force}, author = {Kunze, Ike and Wehrle, Klaus and Trossen, Dirk and Montpetit, Marie-Jos{\'e} and de Foy, Xavier and Griffin, David and Rio, Miguel} } @Article { 2022-wolsing-aistracks, title = {Anomaly Detection in Maritime AIS Tracks: A Review of Recent Approaches}, journal = {Journal of Marine Science and Engineering}, year = {2022}, month = {1}, day = {14}, volume = {10}, number = {1}, abstract = {The automatic identification system (AIS) was introduced in the maritime domain to increase the safety of sea traffic. AIS messages are transmitted as broadcasts to nearby ships and contain, among others, information about the identification, position, speed, and course of the sending vessels. AIS can thus serve as a tool to avoid collisions and increase onboard situational awareness. In recent years, AIS has been utilized in more and more applications since it enables worldwide surveillance of virtually any larger vessel and has the potential to greatly support vessel traffic services and collision risk assessment. Anomalies in AIS tracks can indicate events that are relevant in terms of safety and also security. With a plethora of accessible AIS data nowadays, there is a growing need for the automatic detection of anomalous AIS data. In this paper, we survey 44 research articles on anomaly detection of maritime AIS tracks. We identify the tackled AIS anomaly types, assess their potential use cases, and closely examine the landscape of recent AIS anomaly research as well as their limitations.}, keywords = {automatic identification system; AIS; anomaly detection; maritime safety; maritime security; maritime surveillance}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/2022-wolsing-aistracks.pdf}, web_url = {https://www.mdpi.com/2077-1312/10/1/112}, language = {en}, DOI = {10.3390/jmse10010112}, reviewed = {1}, author = {Wolsing, Konrad and Roepert, Linus and Bauer, Jan and Wehrle, Klaus} } @Inproceedings { 2022-lorenz-ven2us, title = {Interconnected network protection systems - the basis for the reliable and safe operation of distribution grids with a high penetration of renewable energies and electric vehicle}, year = {2022}, abstract = {Power grids are increasingly faced with the introduction of decentralized, highly volatile power supplies from renewable energies and high loads occurring from e-mobility. However, today’s static grid protection cannot manage all upcoming conditions while providing a high level of dependability and security. It forms a bottleneck of a future decarbonizing grid development. In our research project, we develop and verify an adaptive grid protection algorithm. It calculates situation dependent protection parameters for the event of power flow shifts and topology changes caused by volatile power supplies due to the increase of renewable generation and the rapid expansion of e-mobility. As a result the distribution grid can be operated with the optimally adapted protection parameters and functions for changing operating states. To safely adjust the values on protection hardware in the field, i.e., safe from hardware failures and cyberattacks, we research resilient and secure communication concepts for the adaptive and interconnected grid protection system. Finally, we validate our concept and system by demonstrations in the laboratory and field tests.}, tags = {ven2us}, booktitle = {Proceedings of the CIRED workshop on E-mobility and power distribution systems 2022, June 2-3, 2022, Porto, Portugal}, event_place = {Porto}, event_name = {CIRED workshop on E-mobility and power distribution systems 2022}, event_date = {June 2-3, 2022}, DOI = {10.1049/icp.2022.0768}, reviewed = {1}, author = {Lorenz, Matthias and Pletzer, Tobias Markus and Schuhmacher, Malte and Sowa, Torsten and Dahms, Michael and Stock, Simon and Babazadeh, Davood and Becker, Christian and Jaeger, Johann and Lorz, Tobias and Dahlmanns, Markus and Fink, Ina Berenice and Wehrle, Klaus and Ulbig, Andreas and Linnartz, Philipp and Selimaj, Antigona and Offergeld, Thomas} } @Inproceedings { 2021_pennekamp_laser, title = {Collaboration is not Evil: A Systematic Look at Security Research for Industrial Use}, year = {2021}, month = {12}, day = {21}, abstract = {Following the recent Internet of Things-induced trends on digitization in general, industrial applications will further evolve as well. With a focus on the domains of manufacturing and production, the Internet of Production pursues the vision of a digitized, globally interconnected, yet secure environment by establishing a distributed knowledge base. Background. As part of our collaborative research of advancing the scope of industrial applications through cybersecurity and privacy, we identified a set of common challenges and pitfalls that surface in such applied interdisciplinary collaborations. Aim. Our goal with this paper is to support researchers in the emerging field of cybersecurity in industrial settings by formalizing our experiences as reference for other research efforts, in industry and academia alike. Method. Based on our experience, we derived a process cycle of performing such interdisciplinary research, from the initial idea to the eventual dissemination and paper writing. This presented methodology strives to successfully bootstrap further research and to encourage further work in this emerging area. Results. Apart from our newly proposed process cycle, we report on our experiences and conduct a case study applying this methodology, raising awareness for challenges in cybersecurity research for industrial applications. We further detail the interplay between our process cycle and the data lifecycle in applied research data management. Finally, we augment our discussion with an industrial as well as an academic view on this research area and highlight that both areas still have to overcome significant challenges to sustainably and securely advance industrial applications. Conclusions. With our proposed process cycle for interdisciplinary research in the intersection of cybersecurity and industrial application, we provide a foundation for further research. We look forward to promising research initiatives, projects, and directions that emerge based on our methodological work.}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-pennekamp-laser-collaboration.pdf}, publisher = {ACSA}, booktitle = {Proceedings of the Workshop on Learning from Authoritative Security Experiment Results (LASER '20), co-located with the 36th Annual Computer Security Applications Conference (ACSAC '20), December 7-11, 2020, Austin, TX, USA}, event_place = {Austin, TX, USA}, event_name = {Learning from Authoritative Security Experiment Results (LASER '20)}, event_date = {December 8, 2020}, ISBN = {978-1-891562-81-5}, DOI = {10.14722/laser-acsac.2020.23088}, reviewed = {1}, author = {Pennekamp, Jan and Buchholz, Erik and Dahlmanns, Markus and Kunze, Ike and Braun, Stefan and Wagner, Eric and Brockmann, Matthias and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2021-kunze-spin-tracker, title = {Tracking the QUIC Spin Bit on Tofino}, year = {2021}, month = {12}, day = {7}, pages = {15–21}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-kunze-spin-tracker.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 2021 Workshop on Evolution, Performance and Interoperability of QUIC (EPIQ '21)}, ISBN = {9781450391351}, DOI = {10.1145/3488660.3493804}, reviewed = {1}, author = {Kunze, Ike and Sander, Constantin and Wehrle, Klaus and R{\"u}th, Jan} } @Inproceedings { 2021-krude-nfp-pred, title = {Determination of Throughput Guarantees for Processor-based SmartNICs}, year = {2021}, month = {12}, day = {7}, tags = {maki}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-krude-nfp-pred.pdf}, publisher = {ACM}, booktitle = {The 17th International Conference on emerging Networking EXperiments and Technologies (CoNEXT '21)}, ISBN = {978-1-4503-9098-9/21/12}, DOI = {10.1145/3485983.3494842}, reviewed = {1}, author = {Krude, Johannes and R{\"u}th, Jan and Schemmel, Daniel and Rath, Felix and Folbort, Iohannes-Heorh and Wehrle, Klaus} } @Inproceedings { 2021_mitseva_sequences, title = {POSTER: How Dangerous is My Click? Boosting Website Fingerprinting By Considering Sequences of Webpages}, year = {2021}, month = {11}, day = {17}, pages = {2411-2413}, abstract = {Website fingerprinting (WFP) is a special case of traffic analysis, where a passive attacker infers information about the content of encrypted and anonymized connections by observing patterns of data flows. Although modern WFP attacks pose a serious threat to online privacy of users, including Tor users, they usually aim to detect single pages only. By ignoring the browsing behavior of users, the attacker excludes valuable information: users visit multiple pages of a single website consecutively, e.g., by following links. In this paper, we propose two novel methods that can take advantage of the consecutive visits of multiple pages to detect websites. We show that two up to three clicks within a site allow attackers to boost the accuracy by more than 20\% and to dramatically increase the threat to users' privacy. We argue that WFP defenses have to consider this new dimension of the attack surface.}, keywords = {Traffic Analysis; Website Fingerprinting; Web Privacy}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-mitseva-fingerprinting-sequences.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 28th ACM SIGSAC Conference on Computer and Communications Security (CCS '21), November 15-19, 2021, Seoul, Korea}, event_place = {Seoul, Korea}, event_date = {November 15-19, 2021}, ISBN = {978-1-4503-8454-4/21/11}, DOI = {10.1145/3460120.3485347}, reviewed = {1}, author = {Mitseva, Asya and Pennekamp, Jan and Lohm{\"o}ller, Johannes and Ziemann, Torsten and Hoerchner, Carl and Wehrle, Klaus and Panchenko, Andriy} } @Inproceedings { 2021_pennekamp_bootstrapping, title = {Confidential Computing-Induced Privacy Benefits for the Bootstrapping of New Business Relationships}, year = {2021}, month = {11}, day = {15}, number = {RWTH-2021-09499}, abstract = {In addition to quality improvements and cost reductions, dynamic and flexible business relationships are expected to become more important in the future to account for specific customer change requests or small-batch production. Today, despite reservation, sensitive information must be shared upfront between buyers and sellers. However, without a trust relation, this situation is precarious for the involved companies as they fear for their competitiveness following information leaks or breaches of their privacy. To address this issue, the concepts of confidential computing and cloud computing come to mind as they promise to offer scalable approaches that preserve the privacy of participating companies. In particular, designs building on confidential computing can help to technically enforce privacy. Moreover, cloud computing constitutes an elegant design choice to scale these novel protocols to industry needs while limiting the setup and management overhead for practitioners. Thus, novel approaches in this area can advance the status quo of bootstrapping new relationships as they provide privacy-preserving alternatives that are suitable for immediate deployment.}, keywords = {bootstrapping procurement; business relationships; secure industrial collaboration; privacy; Internet of Production}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-pennekamp-bootstrapping.pdf}, publisher = {RWTH Aachen University}, booktitle = {Blitz Talk at the 2021 Cloud Computing Security Workshop (CCSW '21), co-located with the 28th ACM SIGSAC Conference on Computer and Communications Security (CCS '21), November 15-19, 2021, Seoul, Korea}, institution = {RWTH Aachen University}, event_place = {Seoul, Korea}, event_date = {November 14, 2021}, DOI = {10.18154/RWTH-2021-09499}, author = {Pennekamp, Jan and Fuhrmann, Frederik and Dahlmanns, Markus and Heutmann, Timo and Kreppein, Alexander and Grunert, Dennis and Lange, Christoph and Schmitt, Robert H. and Wehrle, Klaus} } @Inproceedings { 2021-sander-shardingrevisited, title = {Sharding and HTTP/2 Connection Reuse Revisited: Why Are There Still Redundant Connections?}, year = {2021}, month = {11}, day = {2}, tags = {legato}, url = {/fileadmin/papers/2021/2021-sander-sharding-revisited.pdf}, web_url = {https://arxiv.org/abs/2110.14239}, publisher = {ACM}, booktitle = {Proceedings of the Internet Measurement Conference (IMC '21)}, event_name = {Internet Measurement Conference 2021}, event_date = {02.11.21 - 04.11.21}, ISBN = {978-1-4503-9129-0/21/11}, DOI = {10.1145/3487552.3487832}, reviewed = {1}, author = {Sander, Constantin and Bl{\"o}cher, Leo and Wehrle, Klaus and R{\"u}th, Jan} } @Article { 2021_kretschmer_cookies, title = {Cookie Banners and Privacy Policies: Measuring the Impact of the GDPR on the Web}, journal = {ACM Transactions on the Web}, year = {2021}, month = {11}, day = {1}, volume = {15}, number = {4}, abstract = {The General Data Protection Regulation (GDPR) is in effect since May of 2018. As one of the most comprehensive pieces of legislation concerning privacy, it sparked a lot of discussion on the effect it would have on users and providers of online services in particular, due to the large amount of personal data processed in this context. Almost three years later, we are interested in revisiting this question to summarize the impact this new regulation has had on actors in the World Wide Web. Using Scopus, we obtain a vast corpus of academic work to survey studies related to changes on websites since and around the time, the GDPR went into force. Our findings show that the emphasis on privacy increased w.r.t. online services, but plenty potential for improvements remains. Although online services are on average more transparent regarding data processing practices in their public data policies, a majority of these policies still either lack information required by the GDPR (e.g., contact information for users to file privacy inquiries), or do not provide this information in a user-friendly form. Additionally, we summarize that online services more often provide means for their users to opt out of data processing, but regularly obstruct convenient access to such means through unnecessarily complex and sometimes illegitimate interface design. Our survey further details that this situation contradicts the preferences expressed by users both verbally and through their actions, and researchers have proposed multiple approaches to facilitate GDPR-conform data processing without negatively impacting the user experience. Thus, we compiled reoccurring points of criticism by privacy researchers and data protection authorities into a list of four guidelines for service providers to consider.}, keywords = {Cookies; Privacy; GDPR; Web; Privacy Legislation; Fingerprinting}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-kretschmer-tweb-cookies.pdf}, publisher = {ACM}, ISSN = {1559-1131}, DOI = {10.1145/3466722}, reviewed = {1}, author = {Kretschmer, Michael and Pennekamp, Jan and Wehrle, Klaus} } @Proceedings { fink-lcn-demons-2021, title = {DEMONS: Extended Manufacturer Usage Description to Restrain Malicious Smartphone Apps}, year = {2021}, month = {10}, day = {4}, tags = {nerd-nrw}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-fink-lcn-demons.pdf}, publisher = {IEEE}, howpublished = {online}, event_place = {Edmonton, Canada}, event_name = {46th IEEE Conference on Local Computer Networks (LCN)}, event_date = {October 4-7, 2021}, DOI = {10.1109/LCN52139.2021.9524879}, reviewed = {1}, author = {Fink, Ina Berenice and Serror, Martin and Wehrle, Klaus} } @Techreport { draft-kunze-coinrg-transport-issues-05, title = {Transport Protocol Issues of In-Network Computing Systems}, year = {2021}, month = {10}, number = {draft-kunze-coinrg-transport-issues-05}, note = {Expires: 28 April 2022 (work in progress)}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2022/draft-kunze-coinrg-transport-issues-05.pdf}, web_url = {https://datatracker.ietf.org/doc/draft-kunze-coinrg-transport-issues/}, publisher = {IETF Trust}, series = {Internet Drafts}, organization = {Internet Engineering Task Force}, institution = {Internet Engineering Task Force}, author = {Kunze, Ike and Wehrle, Klaus and Trossen, Dirk} } @Inproceedings { 2021_reuter_demo, title = {Demo: Traffic Splitting for Tor — A Defense against Fingerprinting Attacks}, year = {2021}, month = {9}, day = {14}, abstract = {Website fingerprinting (WFP) attacks on the anonymity network Tor have become ever more effective. Furthermore, research discovered that proposed defenses are insufficient or cause high overhead. In previous work, we presented a new WFP defense for Tor that incorporates multipath transmissions to repel malicious Tor nodes from conducting WFP attacks. In this demo, we showcase the operation of our traffic splitting defense by visually illustrating the underlying Tor multipath transmission using LED-equipped Raspberry Pis.}, note = {Electronic Communications of the EASST, Volume 080}, keywords = {Onion Routing; Website Fingerprinting; Multipath Traffic; Privacy}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-reuter-splitting-demo.pdf}, publisher = {TU Berlin}, booktitle = {Proceedings of the 2021 International Conference on Networked Systems (NetSys '21), September 13-16, 2021, L{\"u}beck, Germany}, event_place = {L{\"u}beck, Germany}, event_date = {September 13-16, 2021}, ISSN = {1863-2122}, DOI = {10.14279/tuj.eceasst.80.1151}, reviewed = {1}, author = {Reuter, Sebastian and Hiller, Jens and Pennekamp, Jan and Panchenko, Andriy and Wehrle, Klaus} } @Article { 2021_pennekamp_accountable_manufacturing, title = {The Road to Accountable and Dependable Manufacturing}, journal = {Automation}, year = {2021}, month = {9}, day = {13}, volume = {2}, number = {3}, pages = {202-219}, abstract = {The Internet of Things provides manufacturing with rich data for increased automation. Beyond company-internal data exploitation, the sharing of product and manufacturing process data along and across supply chains enables more efficient production flows and product lifecycle management. Even more, data-based automation facilitates short-lived ad hoc collaborations, realizing highly dynamic business relationships for sustainable exploitation of production resources and capacities. However, the sharing and use of business data across manufacturers and with end customers add requirements on data accountability, verifiability, and reliability and needs to consider security and privacy demands. While research has already identified blockchain technology as a key technology to address these challenges, current solutions mainly evolve around logistics or focus on established business relationships instead of automated but highly dynamic collaborations that cannot draw upon long-term trust relationships. We identify three open research areas on the road to such a truly accountable and dependable manufacturing enabled by blockchain technology: blockchain-inherent challenges, scenario-driven challenges, and socio-economic challenges. Especially tackling the scenario-driven challenges, we discuss requirements and options for realizing a blockchain-based trustworthy information store and outline its use for automation to achieve a reliable sharing of product information, efficient and dependable collaboration, and dynamic distributed markets without requiring established long-term trust.}, keywords = {blockchain; supply chain management; Industry 4.0; manufacturing; secure industrial collaboration; scalability; Industrial Internet of Things; Internet of Production}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-pennekamp-manufacturing.pdf}, publisher = {MDPI}, ISSN = {2673-4052}, DOI = {10.3390/automation2030013}, reviewed = {1}, author = {Pennekamp, Jan and Matzutt, Roman and Kanhere, Salil S. and Hiller, Jens and Wehrle, Klaus} } @Article { 2021_matzutt_coinprune_v2, title = {CoinPrune: Shrinking Bitcoin's Blockchain Retrospectively}, journal = {IEEE Transactions on Network and Service Management}, year = {2021}, month = {9}, day = {10}, volume = {18}, number = {3}, pages = {3064-3078}, abstract = {Popular cryptocurrencies continue to face serious scalability issues due to their ever-growing blockchains. Thus, modern blockchain designs began to prune old blocks and rely on recent snapshots for their bootstrapping processes instead. Unfortunately, established systems are often considered incapable of adopting these improvements. In this work, we present CoinPrune, our block-pruning scheme with full Bitcoin compatibility, to revise this popular belief. CoinPrune bootstraps joining nodes via snapshots that are periodically created from Bitcoin's set of unspent transaction outputs (UTXO set). Our scheme establishes trust in these snapshots by relying on CoinPrune-supporting miners to mutually reaffirm a snapshot's correctness on the blockchain. This way, snapshots remain trustworthy even if adversaries attempt to tamper with them. Our scheme maintains its retrospective deployability by relying on positive feedback only, i.e., blocks containing invalid reaffirmations are not rejected, but invalid reaffirmations are outpaced by the benign ones created by an honest majority among CoinPrune-supporting miners. Already today, CoinPrune reduces the storage requirements for Bitcoin nodes by two orders of magnitude, as joining nodes need to fetch and process only 6 GiB instead of 271 GiB of data in our evaluation, reducing the synchronization time of powerful devices from currently 7 h to 51 min, with even larger potential drops for less powerful devices. CoinPrune is further aware of higher-level application data, i.e., it conserves otherwise pruned application data and allows nodes to obfuscate objectionable and potentially illegal blockchain content from their UTXO set and the snapshots they distribute.}, keywords = {blockchain; block pruning; synchronization; bootstrapping; scalability; velvet fork; Bitcoin}, tags = {mynedata; impact_digital; digital_campus}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-matzutt-coinprune-v2.pdf}, language = {English}, ISSN = {1932-4537}, DOI = {10.1109/TNSM.2021.3073270}, reviewed = {1}, author = {Matzutt, Roman and Kalde, Benedikt and Pennekamp, Jan and Drichel, Arthur and Henze, Martin and Wehrle, Klaus} } @Article { 2021_pennekamp_ercim, title = {Unlocking Secure Industrial Collaborations through Privacy-Preserving Computation}, journal = {ERCIM News}, year = {2021}, month = {7}, day = {9}, volume = {126}, pages = {24-25}, abstract = {In industrial settings, significant process improvements can be achieved when utilising and sharing information across stakeholders. However, traditionally conservative companies impose significant confidentiality requirements for any (external) data processing. We discuss how privacy-preserving computation can unlock secure and private collaborations even in such competitive environments.}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-pennekamp-ercim-news.pdf}, web_url = {https://ercim-news.ercim.eu/en126/special/unlocking-secure-industrial-collaborations-through-privacy-preserving-computation}, publisher = {ERCIM EEIG}, ISSN = {0926-4981}, author = {Pennekamp, Jan and Henze, Martin and Wehrle, Klaus} } @Inproceedings { 2021-kunze-efm-evaluation, title = {L, Q, R, and T - Which Spin Bit Cousin Is Here to Stay?}, year = {2021}, month = {7}, pages = {22 - 28}, url = {/fileadmin/papers/2021/2021-kunze-efm-evaluation.pdf}, publisher = {ACM}, booktitle = {ANRW '21: Proceedings of the Applied Networking Research Workshop}, event_place = {Virtual Event}, event_name = {Applied Networking Research Workshop (ANRW '21)}, event_date = {July 2021}, DOI = {10.1145/3472305.3472319}, reviewed = {1}, author = {Kunze, Ike and Wehrle, Klaus and R{\"u}th, Jan} } @Inproceedings { 2021-kunze-signal-detection, title = {Detecting Out-Of-Control Sensor Signals in Sheet Metal Forming using In-Network Computing}, year = {2021}, month = {6}, day = {10}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-kunze-signal-detection.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 2021 IEEE 30th International Symposium on Industrial Electronics (ISIE)}, ISBN = {978-1-7281-9023-5}, ISSN = {2163-5145}, DOI = {10.1109/ISIE45552.2021.9576221}, reviewed = {1}, author = {Kunze, Ike and Niemietz, Philipp and Tirpitz, Liam and Glebke, Ren{\'e} and Trauth, Daniel and Bergs, Thomas and Wehrle, Klaus} } @Inproceedings { 2021-glebke-service-based-forwarding, title = {Service-based Forwarding via Programmable Dataplanes}, year = {2021}, month = {6}, day = {10}, tags = {reflexes}, url = {/fileadmin/papers/2021/2021-glebke-service-based-forwarding.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 2021 IEEE International Conference on High Performance Switching and Routing: Workshop on Semantic Addressing and Routing for Future Networks (SARNET-21)}, ISBN = {978-1-6654-4005-9}, ISSN = {2325-5609}, DOI = {10.1109/HPSR52026.2021.9481814}, reviewed = {1}, author = {Glebke, Ren{\'e} and Trossen, Dirk and Kunze, Ike and Lou, David and R{\"u}th, Jan and Stoffers, Mirko and Wehrle, Klaus} } @Inproceedings { 2021_mangel_reshare, title = {Data Reliability and Trustworthiness through Digital Transmission Contracts}, year = {2021}, month = {6}, day = {8}, volume = {12731}, pages = {265-283}, abstract = {As decision-making is increasingly data-driven, trustworthiness and reliability of the underlying data, e.g., maintained in knowledge graphs or on the Web, are essential requirements for their usability in the industry. However, neither traditional solutions, such as paper-based data curation processes, nor state-of-the-art approaches, such as distributed ledger technologies, adequately scale to the complex requirements and high throughput of continuously evolving industrial data. Motivated by a practical use case with high demands towards data trustworthiness and reliability, we identify the need for digitally-verifiable data immutability as a still insufficiently addressed dimension of data quality. Based on our discussion of shortcomings in related work, we thus propose ReShare, our novel concept of digital transmission contracts with bilateral signatures, to address this open issue for both RDF knowledge graphs and arbitrary data on the Web. Our quantitative evaluation of ReShare’s performance and scalability reveals only moderate computation and communication overhead, indicating significant potential for cost-reductions compared to today’s approaches. By cleverly integrating digital transmission contracts with existing Web-based information systems, ReShare provides a promising foundation for data sharing and reuse in Industry 4.0 and beyond, enabling digital accountability through easily-adoptable digitally-verifiable data immutability and non-repudiation.}, note = {Lecture Notes in Computer Science (LNCS), Volume 12731}, keywords = {Digital transmission contracts; Trust; Data immutability; Non-repudiation; Accountability; Data dynamics; Linked Data; Knowledge graphs}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-mangel-eswc-reshare.pdf}, publisher = {Springer}, booktitle = {Proceedings of the 18th Extended Semantic Web Conference (ESWC '21), June 6-10, 2021, Heraklion, Greece}, event_place = {Heraklion, Greece}, event_date = {June 6-10, 2021}, ISBN = {978-3-030-77384-7}, ISSN = {0302-9743}, DOI = {10.1007/978-3-030-77385-4_16}, reviewed = {1}, author = {Mangel, Simon and Gleim, Lars and Pennekamp, Jan and Wehrle, Klaus and Decker, Stefan} } @Inproceedings { 2021-kunze-coordinate-transformation, title = {Investigating the Applicability of In-Network Computing to Industrial Scenarios}, year = {2021}, month = {5}, day = {11}, pages = {334-340}, keywords = {in-network computing; latency; approximation}, tags = {internet-of-production,reflexes}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-kunze-coordinate-transformation.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 4th IEEE International Conference on Industrial Cyber-Physical Systems (ICPS '21)}, ISBN = {978-1-7281-6207-2}, DOI = {10.1109/ICPS49255.2021.9468247}, reviewed = {1}, author = {Kunze, Ike and Glebke, Ren{\'e} and Scheiper, Jan and Bodenbenner, Matthias and Schmitt, Robert H. and Wehrle, Klaus} } @Article { 2021_buckhorst_lmas, title = {Holarchy for Line-less Mobile Assembly Systems Operation in the Context of the Internet of Production}, journal = {Procedia CIRP}, year = {2021}, month = {5}, day = {3}, volume = {99}, pages = {448-453}, abstract = {Assembly systems must provide maximum flexibility qualified by organization and technology to offer cost-compliant performance features to differentiate themselves from competitors in buyers' markets. By mobilization of multipurpose resources and dynamic planning, Line-less Mobile Assembly Systems (LMASs) offer organizational reconfigurability. By proposing a holarchy to combine LMASs with the concept of an Internet of Production (IoP), we enable LMASs to source valuable information from cross-level production networks, physical resources, software nodes, and data stores that are interconnected in an IoP. The presented holarchy provides a concept of how to address future challenges, meet the requirements of shorter lead times, and unique lifecycle support. The paper suggests an application of decision making, distributed sensor services, recommender-based data reduction, and in-network computing while considering safety and human usability alike.}, note = {Proceedings of the 14th CIRP Conference on Intelligent Computation in Manufacturing Engineering (ICME '20), July 14-17, 2020, Gulf of Naples, Italy}, keywords = {Internet of Production; Line-less Mobile Assembly System; Industrial Assembly; Smart Factory}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-buckhorst-holarchy.pdf}, publisher = {Elsevier}, event_place = {Gulf of Naples, Italy}, event_date = {July 14-17, 2020}, ISSN = {2212-8271}, DOI = {10.1016/j.procir.2021.03.064}, reviewed = {1}, author = {Buckhorst, Armin F. and Montavon, Benjamin and Wolfschl{\"a}ger, Dominik and Buchsbaum, Melanie and Shahidi, Amir and Petruck, Henning and Kunze, Ike and Pennekamp, Jan and Brecher, Christian and H{\"u}sing, Mathias and Corves, Burkhard and Nitsch, Verena and Wehrle, Klaus and Schmitt, Robert H.} } @Article { 2021_bader_privaccichain, title = {Blockchain-Based Privacy Preservation for Supply Chains Supporting Lightweight Multi-Hop Information Accountability}, journal = {Information Processing \& Management}, year = {2021}, month = {5}, day = {1}, volume = {58}, number = {3}, abstract = {The benefits of information sharing along supply chains are well known for improving productivity and reducing costs. However, with the shift towards more dynamic and flexible supply chains, privacy concerns severely challenge the required information retrieval. A lack of trust between the different involved stakeholders inhibits advanced, multi-hop information flows, as valuable information for tracking and tracing products and parts is either unavailable or only retained locally. Our extensive literature review of previous approaches shows that these needs for cross-company information retrieval are widely acknowledged, but related work currently only addresses them insufficiently. To overcome these concerns, we present PrivAccIChain, a secure, privacy-preserving architecture for improving the multi-hop information retrieval with stakeholder accountability along supply chains. To address use case-specific needs, we particularly introduce an adaptable configuration of transparency and data privacy within our design. Hence, we enable the benefits of information sharing as well as multi-hop tracking and tracing even in supply chains that include mutually distrusting stakeholders. We evaluate the performance of PrivAccIChain and demonstrate its real-world feasibility based on the information of a purchasable automobile, the e.GO Life. We further conduct an in-depth security analysis and propose tunable mitigations against common attacks. As such, we attest PrivAccIChain's practicability for information management even in complex supply chains with flexible and dynamic business relationships.}, keywords = {multi-hop collaboration; tracking and tracing; Internet of Production; e.GO; attribute-based encryption}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-bader-ipm-privaccichain.pdf}, publisher = {Elsevier}, ISSN = {0306-4573}, DOI = {10.1016/j.ipm.2021.102529}, reviewed = {1}, author = {Bader, Lennart and Pennekamp, Jan and Matzutt, Roman and Hedderich, David and Kowalski, Markus and Lücken, Volker and Wehrle, Klaus} } @Inproceedings { 2021-kunze-aqm-tofino-p4, title = {Tofino + P4: A Strong Compound for AQM on High-Speed Networks?}, year = {2021}, month = {5}, pages = {72-80}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-kunze-aqm-tofino-p4.pdf}, publisher = {IFIP/IEEE}, booktitle = {Proceedings of the International Symposium on Integrated Network Management (IM '21)}, event_place = {Virtual Event}, event_name = {International Symposium on Integrated Network Management (IM '21)}, event_date = {May 2021}, ISBN = {978-1-7281-9041-9}, reviewed = {1}, author = {Kunze, Ike and Gunz, Moritz and Saam, David and Wehrle, Klaus and R{\"u}th, Jan} } @Inproceedings { 2021_dahlmanns_entrust, title = {Transparent End-to-End Security for Publish/Subscribe Communication in Cyber-Physical Systems}, year = {2021}, month = {4}, day = {28}, pages = {78–87}, abstract = {The ongoing digitization of industrial manufacturing leads to a decisive change in industrial communication paradigms. Moving from traditional one-to-one to many-to-many communication, publish/subscribe systems promise a more dynamic and efficient exchange of data. However, the resulting significantly more complex communication relationships render traditional end-to-end security futile for sufficiently protecting the sensitive and safety-critical data transmitted in industrial systems. Most notably, the central message brokers inherent in publish/subscribe systems introduce a designated weak spot for security as they can access all communication messages. To address this issue, we propose ENTRUST, a novel solution for key server-based end-to-end security in publish/subscribe systems. ENTRUST transparently realizes confidentiality, integrity, and authentication for publish/subscribe systems without any modification of the underlying protocol. We exemplarily implement ENTRUST on top of MQTT, the de-facto standard for machine-to-machine communication, showing that ENTRUST can integrate seamlessly into existing publish/subscribe systems.}, keywords = {cyber-physical system security; publish-subscribe security; end-to-end security}, tags = {internet-of-production, rfc}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-dahlmanns-entrust.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 1st ACM Workshop on Secure and Trustworthy Cyber-Physical Systems (SaT-CPS '21), co-located with the 11th ACM Conference on Data and Application Security and Privacy (CODASPY '21), April 26-28, 2021, Virtual Event, USA}, event_place = {Virtual Event, USA}, event_name = {ACM Workshop on Secure and Trustworthy Cyber-Physical Systems}, event_date = {April 28, 2021}, ISBN = {978-1-4503-8319-6/21/04}, DOI = {10.1145/3445969.3450423}, reviewed = {1}, author = {Dahlmanns, Markus and Pennekamp, Jan and Fink, Ina Berenice and Schoolmann, Bernd and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2021-sander-zoom-cc, title = {Video Conferencing and Flow-Rate Fairness: A First Look at Zoom and the Impact of Flow-Queuing AQM}, year = {2021}, month = {3}, tags = {internet-of-production}, url = {/fileadmin/papers/2021/2021-sander-zoom-fairness-aqm.pdf}, web_url = {https://arxiv.org/abs/2107.00904}, publisher = {Springer}, booktitle = {Proceedings of the Passive and Active Measurement Conference (PAM '21)}, event_name = {Passive and Active Measurement Conference (PAM 2021)}, DOI = {10.1007/978-3-030-72582-2_1}, reviewed = {1}, author = {Sander, Constantin and Kunze, Ike and Wehrle, Klaus and R{\"u}th, Jan} } @Article { 2021_schomakers_insights, title = {Insights on Data Sensitivity from the Technical, Legal and the Users' Perspectives}, journal = {Computer Law Review International}, year = {2021}, month = {2}, day = {15}, volume = {22}, number = {1}, pages = {8-15}, abstract = {Social media, cloud computing, and the Internet of Things connect people around the globe, offering manifold benefits. However, the technological advances and increased user participation generate novel challenges for users' privacy. From the users' perspective, the consequences of data disclosure depend on the perceived sensitivity of that data. But in light of the new technological opportunities to process and combine data, it is questionable whether users can adequately evaluate risks of data disclosures. As mediating authority, data protection laws such as the European General Data Protection Regulation try to protect user data, granting enhanced protection to ''special categories'' of data. This article assesses the legal, technological, and users' perspectives on information sensitivity and their interplay. Technologically, all data can be referred to as ''potentially sensitive.'' The legal and users' perspective on information sensitivity deviate from this standpoint, as some data types are granted special protection by law but are not perceived as very sensitive by users and vice versa. The key findings here suggest the GDPR adequately protecting users' privacy but for small adjustments.}, tags = {Information Sensitivity, Privacy, European Data Protection Law}, ISSN = {1610-7608}, DOI = {10.9785/cri-2021-220103}, reviewed = {1}, author = {Schomakers, Eva-Maria and Lidynia, Chantal and M{\"u}llmann, Dirk and Matzutt, Roman and Wehrle, Klaus and Spiecker gen. D{\"o}hmann, Indra and Ziefle, Martina} } @Inproceedings { 2019_rut_schomakers_privacy, title = {Putting Privacy into Perspective -- Comparing Technical, Legal, and Users' View of Information Sensitivity}, year = {2021}, month = {1}, day = {27}, pages = {857-870}, abstract = {Social media, cloud computing, and the Internet of Things connect people around the globe, offering manifold benefits. However, the technological advances and increased user participation generate novel challenges for users' privacy. From the users' perspective, the consequences of data disclosure depend on the perceived sensitivity of that data. But in light of the new technological opportunities to process and combine data, it is questionable whether users can adequately evaluate risks of data disclosures. As mediating authority, data protection laws such as the European General Data Protection Regulation try to protect user data, granting enhanced protection to ''special categories'' of data. In this paper, we assess the legal, technological, and users' perspectives on information sensitivity and their interplay. Technologically, all data can be referred to as ''potentially sensitive.'' The legal and users' perspective on information sensitivity deviate from this standpoint, as some data types are granted special protection by law but are not perceived as very sensitive by users and vice versa. Our key findings still suggest the GDPR adequately protecting users' privacy but for small adjustments.}, keywords = {Information Sensitivity,Privacy,European Data Protection Law}, tags = {mynedata}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2021/2021-schomakers-3perspectives.pdf}, web_url = {https://dl.gi.de/handle/20.500.12116/34788}, web_url2 = {https://arxiv.org/abs/1911.06569}, publisher = {Gesellschaft f{\"u}r Informatik}, address = {Bonn}, booktitle = {INFORMATIK 2020}, event_place = {Karlsruhe, Germany}, event_name = {INFORMATIK 2020}, event_date = {2020-09-28 to 2020-10-01}, language = {English}, DOI = {10.18420/inf2020_76}, reviewed = {1}, author = {Schomakers, Eva-Maria and Lidynia, Chantal and M{\"u}llmann, Dirk and Matzutt, Roman and Wehrle, Klaus and Spiecker gen. D{\"o}hmann, Indra and Ziefle, Martina} } @Article { 2021-wehrle-energy, title = {A Novel Receiver Design for Energy Packet‐Based Dispatching}, journal = {Energy Technology}, year = {2021}, volume = {9}, number = {2}, DOI = {10.1002/ente.202000937}, reviewed = {1}, author = {Wiegel, Friedirch and De Din, Edoardo and Monti, Antonello and Wehrle, Klaus and Hiller, Marc and Zitterbart, Martina and Hagenmeyer, Veit} } @Inproceedings { 2020_pennekamp_benchmarking, title = {Revisiting the Privacy Needs of Real-World Applicable Company Benchmarking}, year = {2020}, month = {12}, day = {15}, pages = {31-44}, abstract = {Benchmarking the performance of companies is essential to identify improvement potentials in various industries. Due to a competitive environment, this process imposes strong privacy needs, as leaked business secrets can have devastating effects on participating companies. Consequently, related work proposes to protect sensitive input data of companies using secure multi-party computation or homomorphic encryption. However, related work so far does not consider that also the benchmarking algorithm, used in today's applied real-world scenarios to compute all relevant statistics, itself contains significant intellectual property, and thus needs to be protected. Addressing this issue, we present PCB — a practical design for Privacy-preserving Company Benchmarking that utilizes homomorphic encryption and a privacy proxy — which is specifically tailored for realistic real-world applications in which we protect companies' sensitive input data and the valuable algorithms used to compute underlying key performance indicators. We evaluate PCB's performance using synthetic measurements and showcase its applicability alongside an actual company benchmarking performed in the domain of injection molding, covering 48 distinct key performance indicators calculated out of hundreds of different input values. By protecting the privacy of all participants, we enable them to fully profit from the benefits of company benchmarking.}, keywords = {practical encrypted computing; homomorphic encryption; algorithm confidentiality; benchmarking; key performance indicators; industrial application; Internet of Production}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-pennekamp-company-benchmarking.pdf}, web_url = {https://eprint.iacr.org/2020/1512}, publisher = {HomomorphicEncryption.org}, booktitle = {Proceedings of the 8th Workshop on Encrypted Computing \& Applied Homomorphic Cryptography (WAHC '20), December 15, 2020, Virtual Event}, event_place = {Virtual Event}, event_date = {December 15, 2020}, ISBN = {978-3-00-067798-4}, DOI = {10.25835/0072999}, reviewed = {1}, author = {Pennekamp, Jan and Sapel, Patrick and Fink, Ina Berenice and Wagner, Simon and Reuter, Sebastian and Hopmann, Christian and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2020_pennekamp_parameter_exchange, title = {Privacy-Preserving Production Process Parameter Exchange}, year = {2020}, month = {12}, day = {10}, pages = {510-525}, abstract = {Nowadays, collaborations between industrial companies always go hand in hand with trust issues, i.e., exchanging valuable production data entails the risk of improper use of potentially sensitive information. Therefore, companies hesitate to offer their production data, e.g., process parameters that would allow other companies to establish new production lines faster, against a quid pro quo. Nevertheless, the expected benefits of industrial collaboration, data exchanges, and the utilization of external knowledge are significant. In this paper, we introduce our Bloom filter-based Parameter Exchange (BPE), which enables companies to exchange process parameters privacy-preservingly. We demonstrate the applicability of our platform based on two distinct real-world use cases: injection molding and machine tools. We show that BPE is both scalable and deployable for different needs to foster industrial collaborations. Thereby, we reward data-providing companies with payments while preserving their valuable data and reducing the risks of data leakage.}, keywords = {secure industrial collaboration; Bloom filter; oblivious transfer; Internet of Production}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-pennekamp-parameter-exchange.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 36th Annual Computer Security Applications Conference (ACSAC '20), December 7-11, 2020, Austin, TX, USA}, event_place = {Austin, TX, USA}, event_date = {December 7-11, 2020}, ISBN = {978-1-4503-8858-0/20/12}, DOI = {10.1145/3427228.3427248}, reviewed = {1}, author = {Pennekamp, Jan and Buchholz, Erik and Lockner, Yannik and Dahlmanns, Markus and Xi, Tiandong and Fey, Marcel and Brecher, Christian and Hopmann, Christian and Wehrle, Klaus} } @Proceedings { fink-lcn-demons-2020, title = {Extending MUD to Smartphones}, year = {2020}, month = {11}, day = {15}, tags = {nerd-nrw}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-fink-lcn-mud-smartphone.pdf}, publisher = {IEEE}, howpublished = {online}, event_place = {Sydney, Australia}, event_name = {45th IEEE Conference on Local Computer Networks (LCN)}, event_date = {November 16-19, 2020}, DOI = {10.1109/LCN48667.2020.9314782}, reviewed = {1}, author = {Fink, Ina Berenice and Serror, Martin and Wehrle, Klaus} } @Inproceedings { 2020_delacadena_trafficsliver, title = {TrafficSliver: Fighting Website Fingerprinting Attacks with Traffic Splitting}, year = {2020}, month = {11}, day = {12}, pages = {1971-1985}, abstract = {Website fingerprinting (WFP) aims to infer information about the content of encrypted and anonymized connections by observing patterns of data flows based on the size and direction of packets. By collecting traffic traces at a malicious Tor entry node — one of the weakest adversaries in the attacker model of Tor — a passive eavesdropper can leverage the captured meta-data to reveal the websites visited by a Tor user. As recently shown, WFP is significantly more effective and realistic than assumed. Concurrently, former WFP defenses are either infeasible for deployment in real-world settings or defend against specific WFP attacks only. To limit the exposure of Tor users to WFP, we propose novel lightweight WFP defenses, TrafficSliver, which successfully counter today’s WFP classifiers with reasonable bandwidth and latency overheads and, thus, make them attractive candidates for adoption in Tor. Through user-controlled splitting of traffic over multiple Tor entry nodes, TrafficSliver limits the data a single entry node can observe and distorts repeatable traffic patterns exploited by WFP attacks. We first propose a network-layer defense, in which we apply the concept of multipathing entirely within the Tor network. We show that our network-layer defense reduces the accuracy from more than 98\% to less than 16\% for all state-of-the-art WFP attacks without adding any artificial delays or dummy traffic. We further suggest an elegant client-side application-layer defense, which is independent of the underlying anonymization network. By sending single HTTP requests for different web objects over distinct Tor entry nodes, our application-layer defense reduces the detection rate of WFP classifiers by almost 50 percentage points. Although it offers lower protection than our network-layer defense, it provides a security boost at the cost of a very low implementation overhead and is fully compatible with today’s Tor network.}, keywords = {Traffic Analysis; Website Fingerprinting; Privacy; Anonymous Communication; Onion Routing; Web Privacy}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-delacadena-trafficsliver.pdf}, web_url = {https://github.com/TrafficSliver}, publisher = {ACM}, booktitle = {Proceedings of the 27th ACM SIGSAC Conference on Computer and Communications Security (CCS '20), November 9-13, 2020, Orlando, FL, USA}, event_place = {Virtual Event, USA}, event_date = {November 9-13, 2020}, ISBN = {978-1-4503-7089-9/20/11}, DOI = {10.1145/3372297.3423351}, reviewed = {1}, author = {De la Cadena, Wladimir and Mitseva, Asya and Hiller, Jens and Pennekamp, Jan and Reuter, Sebastian and Filter, Julian and Wehrle, Klaus and Engel, Thomas and Panchenko, Andriy} } @Inproceedings { 2020-dahlmanns-imc-opcua, title = {Easing the Conscience with OPC UA: An Internet-Wide Study on Insecure Deployments}, year = {2020}, month = {10}, day = {27}, pages = {101-110}, abstract = {Due to increasing digitalization, formerly isolated industrial networks, e.g., for factory and process automation, move closer and closer to the Internet, mandating secure communication. However, securely setting up OPC UA, the prime candidate for secure industrial communication, is challenging due to a large variety of insecure options. To study whether Internet-facing OPC UA appliances are configured securely, we actively scan the IPv4 address space for publicly reachable OPC UA systems and assess the security of their configurations. We observe problematic security configurations such as missing access control (on 24\% of hosts), disabled security functionality (24\%), or use of deprecated cryptographic primitives (25\%) on in total 92\% of the reachable deployments. Furthermore, we discover several hundred devices in multiple autonomous systems sharing the same security certificate, opening the door for impersonation attacks. Overall, in this paper, we highlight commonly found security misconfigurations and underline the importance of appropriate configuration for security-featuring protocols.}, keywords = {industrial communication; network security; security configuration}, tags = {internet-of-production, rfc}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-dahlmanns-imc-opcua.pdf}, publisher = {ACM}, booktitle = {Proceedings of the Internet Measurement Conference (IMC '20), October 27-29, 2020, Pittsburgh, PA, USA}, event_place = {Pittsburgh, PA, USA}, event_name = {ACM Internet Measurement Conference 2020}, event_date = {October 27-29, 2020}, ISBN = {978-1-4503-8138-3/20/10}, DOI = {10.1145/3419394.3423666}, reviewed = {1}, author = {Dahlmanns, Markus and Lohm{\"o}ller, Johannes and Fink, Ina Berenice and Pennekamp, Jan and Wehrle, Klaus and Henze, Martin} } @Inproceedings { 2020_matzutt_anonboot, title = {Utilizing Public Blockchains for the Sybil-Resistant Bootstrapping of Distributed Anonymity Services}, year = {2020}, month = {10}, day = {7}, pages = {531-542}, abstract = {Distributed anonymity services, such as onion routing networks or cryptocurrency tumblers, promise privacy protection without trusted third parties. While the security of these services is often well-researched, security implications of their required bootstrapping processes are usually neglected: Users either jointly conduct the anonymization themselves, or they need to rely on a set of non-colluding privacy peers. However, the typically small number of privacy peers enable single adversaries to mimic distributed services. We thus present AnonBoot, a Sybil-resistant medium to securely bootstrap distributed anonymity services via public blockchains. AnonBoot enforces that peers periodically create a small proof of work to refresh their eligibility for providing secure anonymity services. A pseudo-random, locally replicable bootstrapping process using on-chain entropy then prevents biasing the election of eligible peers. Our evaluation using Bitcoin as AnonBoot's underlying blockchain shows its feasibility to maintain a trustworthy repository of 1000 peers with only a small storage footprint while supporting arbitrarily large user bases on top of most blockchains.}, keywords = {anonymization; bootstrapping; public blockchain; Sybil attack; anonymity network; cryptocurrency tumbler; Bitcoin; Tor}, tags = {impact_digital; digital_campus}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-matzutt-anonboot.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 15th ACM ASIA Conference on Computer and Communications Security (ASIACCS '20), October 5-9, 2020, Taipei, Taiwan}, event_place = {Taipei, Taiwan}, event_name = {ASIACCS 2020}, event_date = {October 5-9, 2020}, ISBN = {978-1-4503-6750-9/20/10}, DOI = {10.1145/3320269.3384729}, reviewed = {1}, author = {Matzutt, Roman and Pennekamp, Jan and Buchholz, Erik and Wehrle, Klaus} } @Article { serror-iiotsec-tii-2020, title = {Challenges and Opportunities in Securing the Industrial Internet of Things}, journal = {IEEE Transactions on Industrial Informatics}, year = {2020}, month = {9}, day = {11}, volume = {17}, number = {5}, pages = {2985-2996}, tags = {nerd-nrw}, url = {https://comsys.rwth-aachen.de/fileadmin/papers/2020/2020-serror-tii-iiotsec.pdf}, web_url = {https://ieeexplore.ieee.org/document/9195014}, howpublished = {online}, ISSN = {1941-0050}, DOI = {10.1109/TII.2020.3023507}, reviewed = {1}, author = {Serror, Martin and Hack, Sacha and Henze, Martin and Schuba, Marko and Wehrle, Klaus} } @Inproceedings { 2020-kirchhof-wowmom-ccncps, title = {Improving MAC Protocols for Wireless Industrial Networks via Packet Prioritization and Cooperation}, year = {2020}, month = {8}, day = {31}, tags = {internet-of-production, reflexes}, url = {https://comsys.rwth-aachen.de/fileadmin/papers/2020/2020-kirchhof-wireless-mac-improvements.pdf}, publisher = {IEEE Computer Society}, howpublished = {online}, booktitle = {International Symposium on a World of Wireless, Mobile and Multimedia Networks: Workshop on Communication, Computing, and Networking in Cyber Physical Systems (WoWMoM-CCNCPS'2020), August 31 - September 3, 2020, Cork, Ireland}, event_place = {Cork, Ireland}, event_date = {August 31 - September 3, 2020}, DOI = {10.1109/WoWMoM49955.2020.00068}, reviewed = {1}, author = {Kirchhof, J{\"o}rg Christian and Serror, Martin and Glebke, Ren{\'e} and Wehrle, Klaus} } @Article { 2020_niemietz_stamping, title = {Stamping Process Modelling in an Internet of Production}, journal = {Procedia Manufacturing}, year = {2020}, month = {7}, day = {11}, volume = {49}, pages = {61-68}, abstract = {Sharing data between companies throughout the supply chain is expected to be beneficial for product quality as well as for the economical savings in the manufacturing industry. To utilize the available data in the vision of an Internet of Production (IoP) a precise condition monitoring of manufacturing and production processes that facilitates the quantification of influences throughout the supply chain is inevitable. In this paper, we consider stamping processes in the context of an Internet of Production and the preliminaries for analytical models that utilize the ever-increasing available data. Three research objectives to cope with the amount of data and for a methodology to monitor, analyze and evaluate the influence of available data onto stamping processes have been identified: (i) State detection based on cyclic sensor signals, (ii) mapping of in- and output parameter variations onto process states, and (iii) models for edge and in-network computing approaches. After discussing state-of-the-art approaches to monitor stamping processes and the introduction of the fineblanking process as an exemplary stamping process, a research roadmap for an IoP enabling modeling framework is presented.}, note = {Proceedings of the 8th International Conference on Through-Life Engineering Service (TESConf '19), October 27-29, 2019, Cleveland, OH, USA}, keywords = {Stamping Process; Industry 4.0; Fine-blanking; Internet of production; Condition monitoring; Data analytics}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-niemietz-stamping-modelling.pdf}, publisher = {Elsevier}, event_place = {Cleveland, OH, USA}, event_date = {October 27-29, 2019}, ISSN = {2351-9789}, DOI = {10.1016/j.promfg.2020.06.012}, reviewed = {1}, author = {Niemietz, Philipp and Pennekamp, Jan and Kunze, Ike and Trauth, Daniel and Wehrle, Klaus and Bergs, Thomas} } @Inproceedings { 2020_pennekamp_supply_chain_sensing, title = {Secure End-to-End Sensing in Supply Chains}, year = {2020}, month = {7}, day = {1}, abstract = {Trust along digitalized supply chains is challenged by the aspect that monitoring equipment may not be trustworthy or unreliable as respective measurements originate from potentially untrusted parties. To allow for dynamic relationships along supply chains, we propose a blockchain-backed supply chain monitoring architecture relying on trusted hardware. Our design provides a notion of secure end-to-end sensing of interactions even when originating from untrusted surroundings. Due to attested checkpointing, we can identify misinformation early on and reliably pinpoint the origin. A blockchain enables long-term verifiability for all (now trustworthy) IoT data within our system even if issues are detected only after the fact. Our feasibility study and cost analysis further show that our design is indeed deployable in and applicable to today's supply chain settings.}, keywords = {supply chain; trusted computing; trusted execution; blockchain; Internet of Production; condition monitoring}, tags = {internet-of-production}, url = {https://comsys.rwth-aachen.de/fileadmin/papers/2020/2020-pennekamp-supply-chain-sensing.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 5th International Workshop on Cyber-Physical Systems Security (CPS-Sec '20), co-located with the 8th IEEE Conference on Communications and Network Security (CNS '20), June 29-July 1, 2020, Avignon, France}, event_place = {Avignon, France}, event_date = {June 29-July 1, 2020}, ISBN = {978-1-7281-4760-4}, DOI = {10.1109/CNS48642.2020.9162337}, reviewed = {1}, author = {Pennekamp, Jan and Alder, Fritz and Matzutt, Roman and M{\"u}hlberg, Jan Tobias and Piessens, Frank and Wehrle, Klaus} } @Inproceedings { 2020-schemmel-porse, title = {Symbolic Partial-Order Execution for Testing Multi-Threaded Programs}, year = {2020}, month = {7}, tags = {symbiosys}, url = {https://arxiv.org/pdf/2005.06688.pdf}, web_url2 = {https://arxiv.org/abs/2005.06688}, booktitle = {Computer Aided Verification (CAV 2020)}, event_name = {32nd International Conference on Computer Aided Verification}, DOI = {10.1007/978-3-030-53288-8_18}, reviewed = {1}, author = {Schemmel, Daniel and B{\"u}ning, Julian and Rodr{\'i}guez, C{\'e}sar and Laprell, David and Wehrle, Klaus} } @Inproceedings { 2020_matzutt_coinprune, title = {How to Securely Prune Bitcoin’s Blockchain}, year = {2020}, month = {6}, day = {24}, pages = {298-306}, abstract = {Bitcoin was the first successful decentralized cryptocurrency and remains the most popular of its kind to this day. Despite the benefits of its blockchain, Bitcoin still faces serious scalability issues, most importantly its ever-increasing blockchain size. While alternative designs introduced schemes to periodically create snapshots and thereafter prune older blocks, already-deployed systems such as Bitcoin are often considered incapable of adopting corresponding approaches. In this work, we revise this popular belief and present CoinPrune, a snapshot-based pruning scheme that is fully compatible with Bitcoin. CoinPrune can be deployed through an opt-in velvet fork, i.e., without impeding the established Bitcoin network. By requiring miners to publicly announce and jointly reaffirm recent snapshots on the blockchain, CoinPrune establishes trust into the snapshots' correctness even in the presence of powerful adversaries. Our evaluation shows that CoinPrune reduces the storage requirements of Bitcoin already by two orders of magnitude today, with further relative savings as the blockchain grows. In our experiments, nodes only have to fetch and process 5 GiB instead of 230 GiB of data when joining the network, reducing the synchronization time on powerful devices from currently 5 h to 46 min, with even more savings for less powerful devices.}, keywords = {blockchain; block pruning; synchronization; bootstrapping; scalability; velvet fork; Bitcoin}, tags = {mynedata; impact_digital; digital_campus}, url = {https://comsys.rwth-aachen.de/fileadmin/papers/2020/2020-matzutt-coinprune.pdf}, web_url = {https://coinprune.comsys.rwth-aachen.de}, publisher = {IEEE}, booktitle = {Proceedings of the 19th IFIP Networking 2020 Conference (NETWORKING '20), June 22-26, 2020, Paris, France}, event_place = {Paris, France}, event_name = {NETWORKING 2020}, event_date = {June 22-26, 2020}, ISBN = {978-3-903176-28-7}, reviewed = {1}, author = {Matzutt, Roman and Kalde, Benedikt and Pennekamp, Jan and Drichel, Arthur and Henze, Martin and Wehrle, Klaus} } @Inproceedings { 2020-serror-networking-qwin, title = {QWIN: Facilitating QoS in Wireless Industrial Networks Through Cooperation}, year = {2020}, month = {6}, day = {21}, tags = {consent}, url = {https://comsys.rwth-aachen.de/fileadmin/papers/2020/2020-serror-qwin.pdf}, web_url = {https://ieeexplore.ieee.org/abstract/document/9142792}, publisher = {IFIP}, howpublished = {online}, booktitle = {Proceedings of the 19th IFIP Networking 2020 Conference (NETWORKING '20), June 22-26, 2020, Paris, France}, event_place = {Paris, France}, event_name = {IFIP NETWORKING Conference}, event_date = {June 22-26, 2020}, ISBN = {978-3-903176-28-7}, reviewed = {1}, author = {Serror, Martin and Wagner, Eric and Glebke, Ren{\'e} and Wehrle, Klaus} } @Inproceedings { 2020_pennekamp_supply_chain_accountability, title = {Private Multi-Hop Accountability for Supply Chains}, year = {2020}, month = {6}, day = {7}, abstract = {Today's supply chains are becoming increasingly flexible in nature. While adaptability is vastly increased, these more dynamic associations necessitate more extensive data sharing among different stakeholders while simultaneously overturning previously established levels of trust. Hence, manufacturers' demand to track goods and to investigate root causes of issues across their supply chains becomes more challenging to satisfy within these now untrusted environments. Complementarily, suppliers need to keep any data irrelevant to such routine checks secret to remain competitive. To bridge the needs of contractors and suppliers in increasingly flexible supply chains, we thus propose to establish a privacy-preserving and distributed multi-hop accountability log among the involved stakeholders based on Attribute-based Encryption and backed by a blockchain. Our large-scale feasibility study is motivated by a real-world manufacturing process, i.e., a fine blanking line, and reveals only modest costs for multi-hop tracing and tracking of goods.}, keywords = {supply chain; multi-hop tracking and tracing; blockchain; attribute-based encryption; Internet of Production}, tags = {internet-of-production}, url = {https://comsys.rwth-aachen.de/fileadmin/papers/2020/2020-pennekamp-supply-chain-privacy.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 2020 IEEE International Conference on Communications Workshops (ICC Workshops '20), 1st Workshop on Blockchain for IoT and Cyber-Physical Systems (BIoTCPS '20), June 7-11, 2020, Dublin, Ireland}, event_place = {Dublin, Ireland}, event_date = {June 7-11, 2020}, ISBN = {978-1-7281-7440-2}, ISSN = {2474-9133}, DOI = {10.1109/ICCWorkshops49005.2020.9145100}, reviewed = {1}, author = {Pennekamp, Jan and Bader, Lennart and Matzutt, Roman and Niemietz, Philipp and Trauth, Daniel and Henze, Martin and Bergs, Thomas and Wehrle, Klaus} } @Inproceedings { 2020-mann-ur-weldseamstudy, title = {Study on weld seam geometry control for connected gas metal arc welding systems}, year = {2020}, month = {6}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-mann-weld-seam-geometry-control.pdf}, booktitle = {Proceedings of the 2020 Internal Conference on Ubiquitous Robots}, event_name = {Internal Conference on Ubiquitous Robots}, event_date = {June 22-26, 2020}, DOI = {10.1109/UR49135.2020.9144839}, reviewed = {1}, author = {Mann, Samuel and Glebke, Ren{\'e} and Kunze, Ike and Scheurenberg, Dominik and Sharma, Rahul and Reisgen, Uwe and Wehrle, Klaus and Abel, Dirk} } @Article { 2020_gleim_factDAG, title = {FactDAG: Formalizing Data Interoperability in an Internet of Production}, journal = {IEEE Internet of Things Journal}, year = {2020}, month = {4}, day = {14}, volume = {7}, number = {4}, pages = {3243-3253}, abstract = {In the production industry, the volume, variety and velocity of data as well as the number of deployed protocols increase exponentially due to the influences of IoT advances. While hundreds of isolated solutions exist to utilize this data, e.g., optimizing processes or monitoring machine conditions, the lack of a unified data handling and exchange mechanism hinders the implementation of approaches to improve the quality of decisions and processes in such an interconnected environment. The vision of an Internet of Production promises the establishment of a Worldwide Lab, where data from every process in the network can be utilized, even interorganizational and across domains. While numerous existing approaches consider interoperability from an interface and communication system perspective, fundamental questions of data and information interoperability remain insufficiently addressed. In this paper, we identify ten key issues, derived from three distinctive real-world use cases, that hinder large-scale data interoperability for industrial processes. Based on these issues we derive a set of five key requirements for future (IoT) data layers, building upon the FAIR data principles. We propose to address them by creating FactDAG, a conceptual data layer model for maintaining a provenance-based, directed acyclic graph of facts, inspired by successful distributed version-control and collaboration systems. Eventually, such a standardization should greatly shape the future of interoperability in an interconnected production industry.}, keywords = {Data Management; Data Versioning; Interoperability; Industrial Internet of Things; Worldwide Lab}, tags = {internet-of-production}, url = {https://comsys.rwth-aachen.de/fileadmin/papers/2020/2020-gleim-iotj-iop-interoperability.pdf}, publisher = {IEEE}, ISSN = {2327-4662}, DOI = {10.1109/JIOT.2020.2966402}, reviewed = {1}, author = {Gleim, Lars and Pennekamp, Jan and Liebenberg, Martin and Buchsbaum, Melanie and Niemietz, Philipp and Knape, Simon and Epple, Alexander and Storms, Simon and Trauth, Daniel and Bergs, Thomas and Brecher, Christian and Decker, Stefan and Lakemeyer, Gerhard and Wehrle, Klaus} } @Article { 2020_mann_welding_layers, title = {Connected, digitalized welding production — Secure, ubiquitous utilization of data across process layers}, journal = {Advanced Structured Materials}, year = {2020}, month = {4}, day = {1}, volume = {125}, pages = {101-118}, abstract = {A connected, digitalized welding production unlocks vast and dynamic potentials: from improving state of the art welding to new business models in production. For this reason, offering frameworks, which are capable of addressing multiple layers of applications on the one hand and providing means of data security and privacy for ubiquitous dataflows on the other hand, is an important step to enable the envisioned advances. In this context, welding production has been introduced from the perspective of interlaced process layers connecting information sources across various entities. Each layer has its own distinct challenges from both a process view and a data perspective. Besides, investigating each layer promises to reveal insight into (currently unknown) process interconnections. This approach has been substantiated by methods for data security and privacy to draw a line between secure handling of data and the need of trustworthy dealing with sensitive data among different parties and therefore partners. In conclusion, the welding production has to develop itself from an accumulation of local and isolated data sources towards a secure industrial collaboration in an Internet of Production.}, note = {Proceedings of the 1st International Conference on Advanced Joining Processes (AJP '19)}, keywords = {Welding Production; Industrie 4.0; Internet of Production; Data Security; Data Privacy}, tags = {Internet-of-Production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2020/2020-mann-welding-layers.pdf}, publisher = {Springer}, event_place = {Ponta Delgada, Azores, Portugal}, event_date = {October 24-25, 2019}, ISBN = {978-981-15-2956-6}, ISSN = {1869-8433}, DOI = {10.1007/978-981-15-2957-3_8}, reviewed = {1}, author = {Mann, Samuel and Pennekamp, Jan and Brockhoff, Tobias and Farhang, Anahita and Pourbafrani, Mahsa and Oster, Lukas and Uysal, Merih Seran and Sharma, Rahul and Reisgen, Uwe and Wehrle, Klaus and van der Aalst, Wil} } @Inproceedings { 2020_matzutt_coralis, title = {A Secure and Practical Decentralized Ecosystem for Shareable Education Material}, year = {2020}, month = {1}, day = {7}, pages = {529-534}, abstract = {Traditionally, the university landscape is highly federated, which hinders potentials for coordinated collaborations. While the lack of a strict hierarchy on the inter-university level is critical for ensuring free research and higher education, this concurrency limits the access to high-quality education materials. Especially regarding resources such as lecture notes or exercise tasks we observe a high susceptibility to redundant work and lacking quality assessment of material created in isolation by individual university institutes. To remedy this situation, in this paper we propose CORALIS, a decentralized marketplace for offering, acquiring, discussing, and improving education resources across university borders. Our design is based on a permissioned blockchain to (a) realize accountable access control via simple on-chain license terms, (b) trace the evolution of encrypted containers accumulating bundles of shareable education resources, and (c) record user comments and ratings for further improving the quality of offered education material.}, keywords = {blockchain platform; permissioned blockchain; education material; quality assessment; collaborative work}, tags = {impact_digital}, url = {https://comsys.rwth-aachen.de/fileadmin/papers/2020/2020-matzutt-coralis.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 34th International Conference on Information Networking (ICOIN '20), January 7-10, 2020, Barcelona, Spain}, event_place = {Barcelona, Spain}, event_date = {January 7-10, 2020}, ISBN = {978-1-7281-4199-2}, DOI = {10.1109/ICOIN48656.2020.9016478}, reviewed = {1}, author = {Matzutt, Roman and Pennekamp, Jan and Wehrle, Klaus} } @Article { 2020-wehrle-digitalshadows, title = {Mit ''Digitalen Schatten'' Daten verdichten und darstellen : Der Exzellenzcluster ''Internet der Produktion'' forscht {\"u}ber die Produktionstechnik hinaus}, journal = {Der Profilbereich ''Information \& Communication Technology''}, year = {2020}, ISSN = {0179-079X}, DOI = {10.18154/RWTH-2021-02496}, author = {Jarke, Matthias and van der Aalst, Wil and Brecher, Christian and Brockmann, Matthias and Koren, Istv{\'a}n and Lakemeyer, Gerhard and Rumpe, Bernhard and Schuh, G{\"u}nther and Wehrle, Klaus and Ziefle, Martina} } @Inproceedings { 2019-krude-online-reprogramming, title = {Online Reprogrammable Multi Tenant Switches}, year = {2019}, month = {12}, day = {9}, tags = {maki}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-krude-online-reprogramming.pdf}, publisher = {ACM}, booktitle = {1st ACM CoNEXT Workshop on Emerging in-Network Computing Paradigms (ENCP '19)}, ISBN = {978-1-4503-7000-4/19/12}, DOI = {10.1145/3359993.3366643}, reviewed = {1}, author = {Krude, Johannes and Hofmann, Jaco and Eichholz, Matthias and Wehrle, Klaus and Koch, Andreas and Mezini, Mira} } @Inproceedings { 2019-glebke-in-network-cv, title = {Towards Executing Computer Vision Functionality on Programmable Network Devices}, year = {2019}, month = {12}, day = {9}, tags = {reflexes,maki,internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-glebke-in-network-cv.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {1st ACM CoNEXT Workshop on Emerging in-Network Computing Paradigms (ENCP '19)}, language = {en}, ISBN = {978-1-4503-7000-4/19/12}, DOI = {10.1145/3359993.3366646}, reviewed = {1}, author = {Glebke, Ren{\'e} and Krude, Johannes and Kunze, Ike and R{\"u}th, Jan and Senger, Felix and Wehrle, Klaus} } @Inproceedings { 2019_pennekamp_securityConsiderations, title = {Security Considerations for Collaborations in an Industrial IoT-based Lab of Labs}, year = {2019}, month = {12}, day = {4}, abstract = {The productivity and sustainability advances for (smart) manufacturing resulting from (globally) interconnected Industrial IoT devices in a lab of labs are expected to be significant. While such visions introduce opportunities for the involved parties, the associated risks must be considered as well. In particular, security aspects are crucial challenges and remain unsolved. So far, single stakeholders only had to consider their local view on security. However, for a global lab, we identify several fundamental research challenges in (dynamic) scenarios with multiple stakeholders: While information security mandates that models must be adapted wrt. confidentiality to address these new influences on business secrets, from a network perspective, the drastically increasing amount of possible attack vectors challenges today's approaches. Finally, concepts addressing these security challenges should provide backwards compatibility to enable a smooth transition from today's isolated landscape towards globally interconnected IIoT environments.}, keywords = {secure industrial collaboration; interconnected cyber-physical systems; stakeholders; Internet of Production}, tags = {internet-of-production; iotrust}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-pennekamp-security-considerations.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 3rd IEEE Global Conference on Internet of Things (GCIoT '19), December 4–7, 2019, Dubai, United Arab Emirates}, event_place = {Dubai, United Arab Emirates}, event_date = {December 4–7, 2019}, ISBN = {978-1-7281-4873-1}, DOI = {10.1109/GCIoT47977.2019.9058413}, reviewed = {1}, author = {Pennekamp, Jan and Dahlmanns, Markus and Gleim, Lars and Decker, Stefan and Wehrle, Klaus} } @Inproceedings { 2019-rueth-quic-userstudy, title = {Perceiving QUIC: Do Users Notice or Even Care?}, year = {2019}, month = {12}, tags = {maki,reflexes}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-rueth-quic-userstudy.pdf}, web_url2 = {https://arxiv.org/abs/1910.07729}, publisher = {ACM}, booktitle = {In Proceedings of the 15th International Conference on emerging Networking EXperiments and Technologies (CoNEXT '19)}, event_place = {Orlando, Florida, USA}, event_name = {International Conference on emerging Networking EXperiments and Technologies}, event_date = {9.12.2019-12.12.2019}, DOI = {10.1145/3359989.3365416}, reviewed = {1}, author = {R{\"u}th, Jan and Wolsing, Konrad and Wehrle, Klaus and Hohlfeld, Oliver} } @Article { 2019-unterberg-matclass, title = {In-situ material classification in sheet-metal blanking using deep convolutional neural networks}, journal = {Production Engineering}, year = {2019}, month = {11}, day = {13}, volume = {13}, number = {6}, pages = {743-749}, keywords = {internet-of-production}, DOI = {10.1007/s11740-019-00928-w}, reviewed = {1}, author = {Unterberg, Martin and Niemietz, Phillip and Trauth, Daniel and Wehrle, Klaus and Bergs, Thomas} } @Inproceedings { 2019_delacadena_countermeasure, title = {POSTER: Traffic Splitting to Counter Website Fingerprinting}, year = {2019}, month = {11}, day = {12}, pages = {2533-2535}, abstract = {Website fingerprinting (WFP) is a special type of traffic analysis, which aims to infer the websites visited by a user. Recent studies have shown that WFP targeting Tor users is notably more effective than previously expected. Concurrently, state-of-the-art defenses have been proven to be less effective. In response, we present a novel WFP defense that splits traffic over multiple entry nodes to limit the data a single malicious entry can use. Here, we explore several traffic-splitting strategies to distribute user traffic. We establish that our weighted random strategy dramatically reduces the accuracy from nearly 95\% to less than 35\% for four state-of-the-art WFP attacks without adding any artificial delays or dummy traffic.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-delacadena-splitting-defense.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 26th ACM SIGSAC Conference on Computer and Communications Security (CCS '19), November 11-15, 2019, London, United Kingdom}, event_place = {London, United Kingdom}, event_date = {November 11-15, 2019}, ISBN = {978-1-4503-6747-9/19/11}, DOI = {10.1145/3319535.3363249}, reviewed = {1}, author = {De la Cadena, Wladimir and Mitseva, Asya and Pennekamp, Jan and Hiller, Jens and Lanze, Fabian and Engel, Thomas and Wehrle, Klaus and Panchenko, Andriy} } @Inproceedings { 2019_pennekamp_dataflows, title = {Dataflow Challenges in an Internet of Production: A Security \& Privacy Perspective}, year = {2019}, month = {11}, day = {11}, pages = {27-38}, abstract = {The Internet of Production (IoP) envisions the interconnection of previously isolated CPS in the area of manufacturing across institutional boundaries to realize benefits such as increased profit margins and product quality as well as reduced product development costs and time to market. This interconnection of CPS will lead to a plethora of new dataflows, especially between (partially) distrusting entities. In this paper, we identify and illustrate these envisioned inter-organizational dataflows and the participating entities alongside two real-world use cases from the production domain: a fine blanking line and a connected job shop. Our analysis allows us to identify distinct security and privacy demands and challenges for these new dataflows. As a foundation to address the resulting requirements, we provide a survey of promising technical building blocks to secure inter-organizational dataflows in an IoP and propose next steps for future research. Consequently, we move an important step forward to overcome security and privacy concerns as an obstacle for realizing the promised potentials in an Internet of Production.}, keywords = {Internet of Production; dataflows; Information Security}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-pennekamp-dataflows.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 5th ACM Workshop on Cyber-Physical Systems Security and PrivaCy (CPS-SPC '19), co-located with the 26th ACM SIGSAC Conference on Computer and Communications Security (CCS '19), November 11-15, 2019, London, United Kingdom}, event_place = {London, United Kingdom}, event_date = {November 11-15, 2019}, ISBN = {978-1-4503-6831-5/19/11}, DOI = {10.1145/3338499.3357357}, reviewed = {1}, author = {Pennekamp, Jan and Henze, Martin and Schmidt, Simo and Niemietz, Philipp and Fey, Marcel and Trauth, Daniel and Bergs, Thomas and Brecher, Christian and Wehrle, Klaus} } @Inproceedings { 2019-hiller-lcn-sessionsharing, title = {The Case for Session Sharing: Relieving Clients from TLS Handshake Overheads}, year = {2019}, month = {10}, day = {14}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-hiller-lcn-case_for_tls_session_sharing.pdf}, publisher = {IEEE}, booktitle = {IEEE 44th LCN Symposium on Emerging Topics in Networking (LCN Symposium), Osnabr{\"u}ck, Germany}, event_place = {Osnabr{\"u}ck, Germany}, event_name = {44th IEEE Conference on Local Computer Networks (LCN)}, event_date = {October 14-17, 2019}, language = {en}, ISBN = {978-1-7281-2561-9}, DOI = {10.1109/LCNSymposium47956.2019.9000667}, reviewed = {1}, author = {Hiller, Jens and Henze, Martin and Zimmermann, Torsten and Hohlfeld, Oliver and Wehrle, Klaus} } @Inproceedings { 2019-hiller-icnp-tailoringOR, title = {Tailoring Onion Routing to the Internet of Things: Security and Privacy in Untrusted Environments}, year = {2019}, month = {10}, day = {10}, abstract = {An increasing number of IoT scenarios involve mobile, resource-constrained IoT devices that rely on untrusted networks for Internet connectivity. In such environments, attackers can derive sensitive private information of IoT device owners, e.g., daily routines or secret supply chain procedures, when sniffing on IoT communication and linking IoT devices and owner. Furthermore, untrusted networks do not provide IoT devices with any protection against attacks from the Internet. Anonymous communication using onion routing provides a well-proven mechanism to keep the relationship between communication partners secret and (optionally) protect against network attacks. However, the application of onion routing is challenged by protocol incompatibilities and demanding cryptographic processing on constrained IoT devices, rendering its use infeasible. To close this gap, we tailor onion routing to the IoT by bridging protocol incompatibilities and offloading expensive cryptographic processing to a router or web server of the IoT device owner. Thus, we realize resource-conserving access control and end-to-end security for IoT devices. To prove applicability, we deploy onion routing for the IoT within the well-established Tor network enabling IoT devices to leverage its resources to achieve the same grade of anonymity as readily available to traditional devices.}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-hiller-tailoring.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 27th IEEE International Conference on Network Protocols (ICNP '19), October 7-10, 2019, Chicago, IL, USA}, event_place = {Chicago, IL, USA}, event_name = {27th IEEE International Conference on Network Protocols (ICNP 2019)}, event_date = {7-10. Oct. 2019}, ISBN = {978-1-7281-2700-2}, ISSN = {2643-3303}, DOI = {10.1109/ICNP.2019.8888033}, reviewed = {1}, author = {Hiller, Jens and Pennekamp, Jan and Dahlmanns, Markus and Henze, Martin and Panchenko, Andriy and Wehrle, Klaus} } @Inproceedings { 2019-dahlmanns-icnp-knowledgeSystem, title = {Privacy-Preserving Remote Knowledge System}, year = {2019}, month = {10}, day = {7}, abstract = {More and more traditional services, such as malware detectors or collaboration services in industrial scenarios, move to the cloud. However, this behavior poses a risk for the privacy of clients since these services are able to generate profiles containing very sensitive information, e.g., vulnerability information or collaboration partners. Hence, a rising need for protocols that enable clients to obtain knowledge without revealing their requests exists. To address this issue, we propose a protocol that enables clients (i) to query large cloud-based knowledge systems in a privacy-preserving manner using Private Set Intersection and (ii) to subsequently obtain individual knowledge items without leaking the client’s requests via few Oblivious Transfers. With our preliminary design, we allow clients to save a significant amount of time in comparison to performing Oblivious Transfers only.}, note = {Poster Session}, keywords = {private query protocol; knowledge system; remote knowledge; private set intersection; oblivious transfer}, tags = {kimusin; internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-dahlmanns-knowledge-system.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 27th IEEE International Conference on Network Protocols (ICNP '19), October 7-10, 2019, Chicago, IL, USA}, event_place = {Chicago, IL, USA}, event_name = {27th IEEE International Conference on Network Protocols (ICNP 2019)}, event_date = {7-10. Oct. 2019}, ISBN = {978-1-7281-2700-2}, ISSN = {2643-3303}, DOI = {10.1109/ICNP.2019.8888121}, reviewed = {1}, author = {Dahlmanns, Markus and Dax, Chris and Matzutt, Roman and Pennekamp, Jan and Hiller, Jens and Wehrle, Klaus} } @Inproceedings { 2019_pennekamp_multipath, title = {Multipathing Traffic to Reduce Entry Node Exposure in Onion Routing}, year = {2019}, month = {10}, day = {7}, abstract = {Users of an onion routing network, such as Tor, depend on its anonymity properties. However, especially malicious entry nodes, which know the client’s identity, can also observe the whole communication on their link to the client and, thus, conduct several de-anonymization attacks. To limit this exposure and to impede corresponding attacks, we propose to multipath traffic between the client and the middle node to reduce the information an attacker can obtain at a single vantage point. To facilitate the deployment, only clients and selected middle nodes need to implement our approach, which works transparently for the remaining legacy nodes. Furthermore, we let clients control the splitting strategy to prevent any external manipulation.}, note = {Poster Session}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-pennekamp-multipathing.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 27th IEEE International Conference on Network Protocols (ICNP '19), October 7-10, 2019, Chicago, IL, USA}, event_place = {Chicago, IL, USA}, event_name = {27th IEEE International Conference on Network Protocols (ICNP 2019)}, event_date = {7-10. Oct. 2019}, ISBN = {978-1-7281-2700-2}, ISSN = {2643-3303}, DOI = {10.1109/ICNP.2019.8888029}, reviewed = {1}, author = {Pennekamp, Jan and Hiller, Jens and Reuter, Sebastian and De la Cadena, Wladimir and Mitseva, Asya and Henze, Martin and Engel, Thomas and Wehrle, Klaus and Panchenko, Andriy} } @Inproceedings { 2019-hiller-aeit-regaining, title = {Regaining Insight and Control on SMGW-based Secure Communication in Smart Grids}, year = {2019}, month = {9}, abstract = {Smart Grids require extensive communication to enable safe and stable energy supply in the age of decentralized and dynamic energy production and consumption. To protect the communication in this critical infrastructure, public authorities mandate smart meter gateways (SMGWs) to intercept all inbound and outbound communication of premises such as a factory or smart home, and forward the communication data on secure channels established by the SMGW itself to be in control of the communication security. However, using the SMGW as proxy, local devices can neither review the security of these remote connections established by the SMGW nor enforce higher security guarantees than established by the all in one configuration of the SMGW which does not allow for use case-specific security settings. We present mechanisms that enable local devices to regain this insight and control over the full connection, i.e., up to the final receiver, while retaining the SMGW's ability to ensure a suitable security level. Our evaluation shows modest computation and transmission overheads for this increased security in the critical smart grid infrastructure.}, note = {ECSEL; European Union (EU); Horizon 2020; CONNECT Innovative smart components, modules and appliances for a truly connected, efficient and secure smart grid; Grant Agreement No 737434}, tags = {connect}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-hiller-aeit-regaining.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 2019 AEIT International Annual Conference, September 18-20, 2019, Firenze, Italy}, event_place = {Firenze, Italy}, event_name = {AEIT International Annual Conference}, event_date = {September 18-20, 2019}, ISBN = {978-8-8872-3745-0}, DOI = {10.23919/AEIT.2019.8893406}, reviewed = {1}, author = {Hiller, Jens and Komanns, Karsten and Dahlmanns, Markus and Wehrle, Klaus} } @Inproceedings { 2019-krude-chain-opt, title = {Optimizing Data Plane Programs for the Network}, year = {2019}, month = {8}, day = {23}, abstract = {With the move of Software-defined networking from fixed to programmable data planes, network functions are written with P4 or eBPF for targets such as programmable switches, CPU based flow processors and commodity CPUs. These data plane programs are, however, limited in per-packet time budget (e.g., 67.2 ns at 10GbE) and program size, making program optimization imperative. Existing approaches focus on optimizing the distribution of flow rules in fixed data planes or they are limited to a single switch. We see great potential in integrating the network topology into program optimization.}, tags = {maki}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-krude-chain-opt.pdf}, publisher = {ACM}, booktitle = {NetPL '19: ACM SIGCOMM Workshop on Networking and Programming Languages}, event_place = {Beijing, China}, ISBN = {978-1-4503-6877-3/19/08}, DOI = {10.1145/3341561.3349590}, reviewed = {1}, author = {Krude, Johannes and Eichholz, Matthias and Winck, Maximilian and Wehrle, Klaus and Mezini, Mira} } @Inproceedings { 2019-sander-depcci, title = {DeePCCI: Deep Learning-based Passive Congestion Control Identification}, year = {2019}, month = {8}, day = {18}, tags = {maki}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-sander-deepcci.pdf}, web_url2 = {https://arxiv.org/abs/1907.02323}, publisher = {ACM}, booktitle = {In Proceedings of the ACM SIGCOMM Workshop on Network Meets AI \& ML (NetAI '19)}, event_place = {Beijing, China}, event_name = {Workshop on Network Meets AI \& ML}, event_date = {18.08.2019}, DOI = {10.1145/3341216.3342211}, reviewed = {1}, author = {Sander, Constantin and R{\"u}th, Jan and Hohlfeld, Oliver and Wehrle, Klaus} } @Inproceedings { 2019-wolsing-quicperf, title = {A Performance Perspective on Web Optimized Protocol Stacks: TCP+TLS+HTTP/2 vs. QUIC}, year = {2019}, month = {7}, day = {22}, tags = {maki,reflexes}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-wolsing-quicperf.pdf}, web_url2 = {https://arxiv.org/abs/1906.07415}, publisher = {ACM}, booktitle = {In Proceedings of the Applied Networking Research Workshop (ANRW '19)}, event_place = {Montreal, Quebec, Canada}, event_name = {Applied Networking Research Workshop at IETF-105}, event_date = {2019-07-22}, DOI = {10.1145/3340301.3341123}, reviewed = {1}, author = {Wolsing, Konrad and R{\"u}th, Jan and Wehrle, Klaus and Hohlfeld, Oliver} } @Inproceedings { 2019-hohlfeld-bpfperf, title = {Demystifying the Performance of XDP BPF}, year = {2019}, month = {6}, day = {25}, tags = {maki,reflexes}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-hohlfeld-bpfperf.pdf}, publisher = {IEEE}, booktitle = {IEEE International Conference on Network Softwarization (NetSoft)}, event_name = {IEEE International Conference on Network Softwarization}, DOI = {10.1109/NETSOFT.2019.8806651}, reviewed = {1}, author = {Hohlfeld, Oliver and Krude, Johannes and Reelfs, Jens Helge and R{\"u}th, Jan and Wehrle, Klaus} } @Inproceedings { 2019_pennekamp_infrastructure, title = {Towards an Infrastructure Enabling the Internet of Production}, year = {2019}, month = {5}, day = {8}, pages = {31-37}, abstract = {New levels of cross-domain collaboration between manufacturing companies throughout the supply chain are anticipated to bring benefits to both suppliers and consumers of products. Enabling a fine-grained sharing and analysis of data among different stakeholders in an automated manner, such a vision of an Internet of Production (IoP) introduces demanding challenges to the communication, storage, and computation infrastructure in production environments. In this work, we present three example cases that would benefit from an IoP (a fine blanking line, a high pressure die casting process, and a connected job shop) and derive requirements that cannot be met by today’s infrastructure. In particular, we identify three orthogonal research objectives: (i) real-time control of tightly integrated production processes to offer seamless low-latency analysis and execution, (ii) storing and processing heterogeneous production data to support scalable data stream processing and storage, and (iii) secure privacy-aware collaboration in production to provide a basis for secure industrial collaboration. Based on a discussion of state-of-the-art approaches for these three objectives, we create a blueprint for an infrastructure acting as an enabler for an IoP.}, keywords = {Internet of Production; Cyber-Physical Systems; Data Processing; Low Latency; Secure Industrial Collaboration}, tags = {internet-of-production}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-pennekamp-iop-infrastructure.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 2nd IEEE International Conference on Industrial Cyber-Physical Systems (ICPS '19), May 6-9, 2019, Taipei, TW}, event_place = {Taipei, TW}, event_date = {May 6-9, 2019}, ISBN = {978-1-5386-8500-6/19}, DOI = {10.1109/ICPHYS.2019.8780276}, reviewed = {1}, author = {Pennekamp, Jan and Glebke, Ren{\'e} and Henze, Martin and Meisen, Tobias and Quix, Christoph and Hai, Rihan and Gleim, Lars and Niemietz, Philipp and Rudack, Maximilian and Knape, Simon and Epple, Alexander and Trauth, Daniel and Vroomen, Uwe and Bergs, Thomas and Brecher, Christian and B{\"u}hrig-Polaczek, Andreas and Jarke, Matthias and Wehrle, Klaus} } @Techreport { 2019-rueth-blitzstart, title = {Blitz-starting QUIC Connections}, year = {2019}, month = {5}, day = {8}, number2 = {arXiv:1905.03144 [cs.NI]}, pages = {1--8}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-rueth-blitzstart.pdf}, web_url = {https://arxiv.org/abs/1905.03144}, misc2 = {Online}, publisher = {COMSYS, RWTH Aachen University}, address = {Ahornstr. 55, 52074 Aachen, Germany}, institution = {COMSYS, RWTH Aachen University}, type = {Technical Report}, language = {en}, author = {R{\"u}th, Jan and Wolsing, Konrad and Serror, Martin and Wehrle, Klaus and Hohlfeld, Oliver} } @Inproceedings { 2019_wagner_dispute_resolution, title = {Dispute Resolution for Smart Contract-based Two Party Protocols}, year = {2019}, month = {5}, abstract = {Blockchain systems promise to mediate interactions of mutually distrusting parties without a trusted third party. However, protocols with full smart contract-based security are either limited in functionality or complex, with high costs for secured interactions. This observation leads to the development of protocol-specific schemes to avoid costly dispute resolution in case all participants remain honest. In this paper, we introduce SmartJudge, an extensible generalization of this trend for smart contract-based two-party protocols. SmartJudge relies on a protocol-independent mediator smart contract that moderates two-party interactions and only consults protocol-specific verifier smart contracts in case of a dispute. This way, SmartJudge avoids verification costs in absence of disputes and sustains interaction confidentiality among honest parties. We implement verifier smart contracts for cross-blockchain trades and exchanging digital goods and show that SmartJudge can reduce costs by 46-50\% and 22\% over current state of the art, respectively.}, keywords = {Ethereum,Bitcoin,smart contracts,two-party protocols,dispute resolution,cross-blockchain trades}, tags = {mynedata, impact-digital, rfc}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-wagner-dispute.pdf}, publisher = {IEEE}, booktitle = {IEEE International Conference on Blockchain and Cryptocurrency 2019 (ICBC 2019)}, event_place = {Seoul, South Korea}, event_name = {IEEE International Conference on Blockchain and Cryptocurrency 2019}, language = {English}, DOI = {10.1109/BLOC.2019.8751312}, reviewed = {1}, author = {Wagner, Eric and V{\"o}lker, Achim and Fuhrmann, Frederik and Matzutt, Roman and Wehrle, Klaus} } @Techreport { 2019-hohlfeld-santa-tr, title = {Application-Agnostic Offloading of Packet Processing}, year = {2019}, month = {4}, day = {1}, number2 = {arXiv:1904.00671 [cs.NI]}, pages = {1--14}, tags = {maki}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-hohlfeld-santatr.pdf}, web_url = {https://arxiv.org/abs/1904.00671}, misc2 = {Online}, publisher = {COMSYS, RWTH Aachen University}, address = {Ahornstr. 55, 52074 Aachen, Germany}, institution = {COMSYS, RWTH Aachen University}, type = {Technical Report}, language = {en}, author = {Hohlfeld, Oliver and Reelfs, Helge and R{\"u}th, Jan and Schmidt, Florian and Zimmermann, Torsten and Hiller, Jens and Wehrle, Klaus} } @Article { 2019_henze_flexible_netzwerkstrukturen_iop, title = {Flexible Netzwerkarchitekturen f{\"u}r das Internet of Production}, journal = {ITG-news}, year = {2019}, month = {4}, volume = {02/2019}, pages = {7-8}, tags = {internet-of-production,reflexes}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-henze-itg-iop-networkarchitectures.pdf}, publisher = {Informationstechnische Gesellschaft im VDE}, address = {Frankfurt am Main}, author = {Henze, Martin and Glebke, Ren{\'e} and Wehrle, Klaus} } @Inproceedings { 2019-glebke-wirelessgain, title = {Enabling Wireless Network Support for Gain Scheduled Control}, year = {2019}, month = {3}, day = {25}, tags = {reflexes,spp}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-glebke-wirelessgain.pdf}, publisher = {ACM}, booktitle = {In Proceedings of the International Workshop on Edge Systems, Analytics and Networking (EdgeSys 2019)}, event_place = {Dresden, Germany}, event_name = {International Workshop on Edge Systems, Analytics and Networking (EdgeSys 2019)}, event_date = {25.03.2019}, DOI = {10.1145/3301418.3313943}, reviewed = {1}, author = {Gallenm{\"u}ller, Sebastian and Glebke, Ren{\'e} and G{\"u}nther, Stephan and Hauser, Eric and Leclaire, Maurice and Reif, Stefan and R{\"u}th, Jan and Schmidt, Andreas and Carle, Georg and Herfet, Thorsten and Schr{\"o}der-Preikschat, Wolfgang and Wehrle, Klaus} } @Inproceedings { 2019-glebke-hicss-integrated, title = {A Case for Integrated Data Processing in Large-Scale Cyber-Physical Systems}, year = {2019}, month = {1}, day = {8}, pages = {7252-7261}, tags = {internet-of-production,reflexes}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2019/2019-glebke-integrated.pdf}, misc2 = {Online}, publisher = {University of Hawai'i at Manoa / AIS}, booktitle = {Proceedings of the 52nd Hawaii International Conference on System Sciences (HICSS), Wailea, HI, USA}, language = {en}, ISBN = {978-0-9981331-2-6}, DOI = {10.24251/HICSS.2019.871}, reviewed = {1}, author = {Glebke, Ren{\'e} and Henze, Martin and Wehrle, Klaus and Niemietz, Philipp and Trauth, Daniel and Mattfeld, Patrick and Bergs, Thomas} } @Article { 2019_wehrle_dagstuhl_beginners, title = {The Dagstuhl Beginners Guide to Reproducibility for Experimental Networking Research}, journal = {ACM SIGCOMM Computer Communication Review}, year = {2019}, month = {1}, volume = {49}, number = {1}, pages = {24-30}, abstract = {Reproducibility is one of the key characteristics of good science, but hard to achieve for experimental disciplines like Internet measurements and networked systems. This guide provides advice to researchers, particularly those new to the field, on designing experiments so that their work is more likely to be reproducible and to serve as a foundation for follow-on work by others.}, ISSN = {0146-4833}, DOI = {10.1145/3314212.3314217}, author = {Bajpai, Vaibhav and Brunstrom, Anna and Feldmann, Anja and Kellerer, Wolfgang and Pras, Aiko and Schulzrinne, Henning and Smaragdakis, Georgios and W{\"a}hlisch, Matthias and Wehrle, Klaus} } @Inproceedings { 2018-bader-ethereum-car-insurance, title = {Smart Contract-based Car Insurance Policies}, year = {2018}, month = {12}, day = {9}, tags = {mynedata, internet-of-production, rfc}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-bader-ethereum-car-insurance.pdf}, web_url = {https://ieeexplore.ieee.org/document/8644136}, publisher = {IEEE}, booktitle = {2018 IEEE Globecom Workshops (GC Wkshps)}, event_place = {Abu Dhabi, United Arab Emirates}, event_name = {1st International Workshop on Blockchain in IoT, co-located with IEEE Globecom 2018}, event_date = {2018-12-09}, DOI = {10.1109/GLOCOMW.2018.8644136}, reviewed = {1}, author = {Bader, Lennart and B{\"u}rger, Jens Christoph and Matzutt, Roman and Wehrle, Klaus} } @Proceedings { 2018-QuicTesting, title = {Interoperability-Guided Testing of QUIC Implementations using Symbolic Execution}, year = {2018}, month = {12}, day = {4}, tags = {erc,symbiosys}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-rath-quictesting.pdf}, web_url = {https://dl.acm.org/citation.cfm?id=3284853}, web_url2 = {https://arxiv.org/abs/1811.12099}, publisher = {ACM}, event_place = {Heraklion, Greece}, event_name = {EPIQ'18 Workshop Paper}, event_date = {4.12.2018}, language = {en}, ISBN = {978-1-4503-6082-1}, DOI = {10.1145/3284850.3284853}, reviewed = {1}, author = {Rath, Felix and Schemmel, Daniel and Wehrle, Klaus} } @Inproceedings { 2018-zimmermann-webready, title = {Is the Web ready for HTTP/2 Server Push?}, year = {2018}, month = {12}, day = {4}, tags = {maki}, url = {https://dl.acm.org/citation.cfm?id=3281434}, web_url = {https://arxiv.org/abs/1810.05554}, web_url2 = {https://http2.netray.io/interleaving.html}, publisher = {ACM}, booktitle = {Proceedings of the 14th International Conference on emerging Networking EXperiments and Technologies (CoNEXT), Crete, Greete}, event_place = {Crete, Greece}, event_name = {CoNEXT 2018}, event_date = {4.12.18 - 7.12.18}, language = {en}, DOI = {10.1145/3281411.3281434}, reviewed = {1}, author = {Zimmermann, Torsten and Wolters, Benedikt and Hohlfeld, Oliver and Wehrle, Klaus} } @Inproceedings { 2018-ziegeldorf-shield, title = {SHIELD: A Framework for Efficient and Secure Machine Learning Classification in Constrained Environments}, year = {2018}, month = {12}, pages = {1-15}, tags = {iop,mynedata}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-ziegeldorf-acsac-shield.pdf}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the 34rd Annual Computer Security Applications Conference}, event_place = {San Juan, Puerto Rico, USA}, event_name = {The 34rd Annual Computer Security Applications Conference (ACSAC 2018)}, event_date = {2018-12-03 - 2018-12-07}, language = {English}, DOI = {10.1145/3274694.3274716}, reviewed = {1}, author = {Ziegeldorf, Jan Henrik and Metzke, Jan and Wehrle, Klaus} } @Article { 2018-stoffers-on-automated-memoization, title = {On Automated Memoization in the Field of Simulation Parameter Studies}, journal = {ACM Transactions on Modeling and Computer Simulation (TOMACS)}, year = {2018}, month = {10}, volume = {28}, number = {4}, number2 = {Article 26}, pages = {26:1-26:25}, tags = {memosim,symbiosys}, url = {file:2213}, DOI = {10.1145/3186316}, reviewed = {1}, author = {Stoffers, Mirko and Schemmel, Daniel and Soria Dustmann, Oscar and Wehrle, Klaus} } @Inproceedings { 2018-hiller-lcn-lowlatencyiiot, title = {Secure Low Latency Communication for Constrained Industrial IoT Scenarios}, year = {2018}, month = {10}, tags = {connect,iop,nerd-nrw}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-hiller-lcn-secure_low_latency_communication_iiot.pdf}, publisher = {IEEE}, booktitle = {43rd IEEE Conference on Local Computer Networks (LCN), Chicago, USA}, event_place = {Chicago, USA}, event_name = {43nd IEEE Conference on Local Computer Networks (LCN)}, event_date = {October 1-4, 2018}, language = {en}, ISBN = {978-1-5386-4413-3}, DOI = {10.1109/LCN.2018.8638027}, reviewed = {1}, author = {Hiller, Jens and Henze, Martin and Serror, Martin and Wagner, Eric and Richter, Jan Niklas and Wehrle, Klaus} } @Inproceedings { 2018-hohlfeld-santa, title = {Application-Agnostic Offloading of Datagram Processing}, year = {2018}, month = {9}, day = {3}, tags = {maki,ssiclops,reflexes}, url = {https://ieeexplore.ieee.org/document/8493053}, publisher = {IEEE}, booktitle = {Proceedings of the 2018 30th International Teletraffic Congress (ITC 30), Vienna, Austria}, event_place = {Vienna, Austria}, event_name = {International Teletraffic Congress ITC 30}, event_date = {03.09.2018 - 07-09.2018}, language = {en}, DOI = {10.1109/ITC30.2018.00015}, reviewed = {1}, author = {Hohlfeld, Oliver and Reelfs, Jens Helge and R{\"u}th, Jan and Schmidt, Florian and Zimmermann, Torsten and Hiller, Jens and Wehrle, Klaus} } @Inproceedings { 2018-soria-dustmann-parti, title = {PARTI: A Multi-interval Theory Solver for Symbolic Execution}, year = {2018}, month = {9}, tags = {symbiosys}, url = {file:2195}, booktitle = {Proceedings of the 2018 Conference on Automated Software Engineering (ASE'18)}, DOI = {10.1145/3238147.3238179}, reviewed = {1}, author = {Soria Dustmann, Oscar and Wehrle, Klaus and Cadar, Cristian} } @Inproceedings { 2018-serror-ares-iotsec, title = {Towards In-Network Security for Smart Homes}, year = {2018}, month = {8}, day = {27}, tags = {consent, iotrust}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-serror-iotsecfor-in-network-security.pdf}, publisher = {ACM}, howpublished = {online}, booktitle = {Proceedings of the 2nd International Workshop on Security and Forensics of IoT (IoT-SECFOR), co-located with the 13th International Conference on Availability, Reliability and Security (ARES 2018), Hamburg, Germany}, event_place = {Hamburg, Germany}, event_name = {International Conference on Availability, Reliability and Security}, event_date = {August 27--30, 2018}, ISBN = {978-1-4503-6448-5}, DOI = {10.1145/3230833.3232802}, reviewed = {1}, author = {Serror, Martin and Henze, Martin and Hack, Sacha and Schuba, Marko and Wehrle, Klaus} } @Inproceedings { 2018-krude-circuit, title = {Circuit Switched VM Networks for Zero-Copy IO}, year = {2018}, month = {8}, day = {20}, pages = {1-7}, tags = {maki}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-krude-xocks.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 2018 Afternoon Workshop on Kernel Bypassing Networks (KBNets'18)}, event_place = {Budapest, Hungary}, event_name = {Afternoon Workshop on Kernel Bypassing Networks}, event_date = {20.8.2018}, DOI = {10.1145/3229538.3229539}, reviewed = {1}, author = {Krude, Johannes and Stoffers, Mirko and Wehrle, Klaus} } @Inproceedings { 2018-rueth-reflexnetcompute, title = {Towards In-Network Industrial Feedback Control}, year = {2018}, month = {8}, day = {20}, tags = {reflexes}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-rueth-reflexnetcompute.pdf}, publisher = {ACM}, booktitle = {Proceedings of the ACM SIGCOMM 2018 1st Workshop on In-Network Computing (NetCompute '18)}, event_place = {Budapest, Hungary}, event_name = {ACM SIGCOMM 2018 1st Workshop on In-Network Computing (NetCompute 2018)}, event_date = {20.08.2018}, DOI = {10.1145/3229591.3229592}, reviewed = {1}, author = {R{\"u}th, Jan and Glebke, Ren{\'e} and Wehrle, Klaus and Causevic, Vedad and Hirche, Sandra} } @Inproceedings { 2018-cav-schemmel-liveness, title = {Symbolic Liveness Analysis of Real-World Software}, year = {2018}, month = {7}, day = {14}, tags = {symbiosys}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-schemmel-symbolic-liveness-analysis-of-real-world-software.pdf}, booktitle = {Computer Aided Verification (CAV 2018)}, event_place = {Oxford, Great Britain}, event_name = {30th International Conference on Computer Aided Verification}, event_date = {2018-07-14 to 2018-07-17}, language = {en}, DOI = {10.1007/978-3-319-96142-2_27}, reviewed = {1}, author = {Schemmel, Daniel and B{\"u}ning, Julian and Soria Dustmann, Oscar and Noll, Thomas and Wehrle, Klaus} } @Article { 2018-serror-tvt-fb, title = {Finite Blocklength Performance of Cooperative Multi-Terminal Wireless Industrial Networks}, journal = {IEEE Transactions on Vehicular Technology}, year = {2018}, month = {7}, volume = {67}, number = {7}, pages = {5778-5792}, tags = {koi}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-serror-tvt-fbl-performance.pdf}, publisher = {IEEE}, howpublished = {online}, ISSN = {0018-9545}, DOI = {10.1109/TVT.2018.2794178}, reviewed = {1}, author = {Hu, Yulin and Serror, Martin and Wehrle, Klaus and Gross, James} } @Inproceedings { 2018-serror-wowmom-relaying, title = {Practical Evaluation of Cooperative Communication for Ultra-Reliability and Low-Latency}, year = {2018}, month = {6}, day = {11}, tags = {iop}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-serror-wowmom-relaying.pdf}, publisher = {IEEE}, howpublished = {online}, booktitle = {19th IEEE International Symposium on ''A World of Wireless, Mobile and Multimedia Networks'' (IEEE WoWMoM 2018), Chania, Greece}, event_place = {Chania, Crete, Greece}, event_name = {WoWMoM}, event_date = {June 12-15, 2018}, ISBN = {978-1-5386-4725-7}, DOI = {10.1109/WoWMoM.2018.8449807}, reviewed = {1}, author = {Serror, Martin and Vaa{\ss}en, Sebastian and Wehrle, Klaus and Gross, James} } @Inproceedings { 2018-hiller-ic2e-cpplintegration, title = {Giving Customers Control over Their Data: Integrating a Policy Language into the Cloud}, year = {2018}, month = {4}, day = {19}, pages = {241-249}, tags = {ssiclops,iop}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-hiller-ic2e-policy-aware-cloud.pdf}, web_url = {https://ieeexplore.ieee.org/document/8360335}, publisher = {IEEE}, booktitle = {Proceedings of the 2018 IEEE International Conference on Cloud Engineering (IC2E 2018), Orlando, Florida, USA}, event_place = {Orlando, Florida, USA}, event_name = {2018 IEEE International Conference on Cloud Engineering (IC2E 2018)}, event_date = {2018-04-19}, ISBN = {978-1-5386-5008-0}, DOI = {10.1109/IC2E.2018.00050}, reviewed = {1}, author = {Hiller, Jens and Kimmerlin, Mael and Plauth, Max and Heikkila, Seppo and Klauck, Stefan and Lindfors, Ville and Eberhardt, Felix and Bursztynowski, Dariusz and Santos, Jesus Llorente and Hohlfeld, Oliver and Wehrle, Klaus} } @Inproceedings { 2018-matzutt-bitcoin-content-countermeasures, title = {Thwarting Unwanted Blockchain Content Insertion}, year = {2018}, month = {4}, day = {17}, pages = {364-370}, abstract = {Since the introduction of Bitcoin in 2008, blockchain systems have seen an enormous increase in adoption. By providing a persistent, distributed, and append-only ledger, blockchains enable numerous applications such as distributed consensus, robustness against equivocation, and smart contracts. However, recent studies show that blockchain systems such as Bitcoin can be (mis)used to store arbitrary content. This has already been used to store arguably objectionable content on Bitcoin's blockchain. Already single instances of clearly objectionable or even illegal content can put the whole system at risk by making its node operators culpable. To overcome this imminent risk, we survey and discuss the design space of countermeasures against the insertion of such objectionable content. Our analysis shows a wide spectrum of potential countermeasures, which are often combinable for increased efficiency. First, we investigate special-purpose content detectors as an ad hoc mitigation. As they turn out to be easily evadable, we also investigate content-agnostic countermeasures. We find that mandatory minimum fees as well as mitigation of transaction manipulability via identifier commitments significantly raise the bar for inserting harmful content into a blockchain.}, keywords = {Bitcoin,blockchain,security,objectionable content,countermeasure}, tags = {mynedata,iop}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-matzutt-blockchain-contents-countermeasures.pdf}, web_url = {https://ieeexplore.ieee.org/document/8360355}, publisher = {IEEE}, booktitle = {Proceedings of the First IEEE Workshop on Blockchain Technologies and Applications (BTA), co-located with the IEEE International Conference on Cloud Engineering 2018 (IC2E 2018)}, event_place = {Orlando, Florida, USA}, event_name = {First IEEE Workshop on Blockchain Technologies and Applications (BTA)}, event_date = {2018-04-17}, language = {English}, ISBN = {978-1-5386-5008-0}, DOI = {10.1109/IC2E.2018.00070}, reviewed = {1}, author = {Matzutt, Roman and Henze, Martin and Ziegeldorf, Jan Henrik and Hiller, Jens and Wehrle, Klaus} } @Inproceedings { 2018-rueth-reflexdemo, title = {Demo: Towards In-Network Processing for Low-Latency Industrial Control}, year = {2018}, month = {4}, day = {15}, tags = {reflexes}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-rueth-reflexdemo.pdf}, publisher = {IEEE Computer Society}, booktitle = {In Proceedings of IEEE INFOCOM 2018 - IEEE Conference on Computer Communications}, event_place = {Honolulu, HI, USA}, event_name = {International Conference on Computer Communications (INFOCOM)}, event_date = {15.04.2018 - 19.04.2018}, language = {en}, DOI = {10.1109/INFCOMW.2018.8406844}, reviewed = {1}, author = {R{\"u}th, Jan and Glebke, Ren{\'e} and Ulmen, Tanja and Wehrle, Klaus} } @Inproceedings { 2018-cpsbench-schemmel-equiv, title = {Towards Benchmark Optimization by Automated Equivalence Detection}, year = {2018}, month = {4}, day = {10}, tags = {symbiosys,reflexes}, url = {file:2196}, booktitle = {Proceedings of the 1st Workshop on Benchmarking Cyber-Physical Networks and Systems (CPSBench'18)}, event_place = {Porto, Portugal}, event_name = {1st Workshop on Benchmarking Cyber-Physical Networks and Systems}, event_date = {2018-04-10}, ISBN = {978-1-5386-6742-2}, DOI = {10.1109/CPSBench.2018.00011}, reviewed = {1}, author = {Schemmel, Daniel and Glebke, Ren{\'e} and Stoffers, Mirko and Wehrle, Klaus} } @Article { 2016-fgcs-ziegeldorf-bitcoin, title = {Secure and anonymous decentralized Bitcoin mixing}, journal = {Future Generation Computer Systems}, year = {2018}, month = {3}, volume = {80}, pages = {448-466}, keywords = {Pseudonymity, anonymity, and untraceability}, tags = {rfc}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018-ziegeldorf-fgcs-bitcoin.pdf}, misc2 = {Online}, publisher = {Elsevier}, language = {en}, ISSN = {0167-739X}, DOI = {10.1016/j.future.2016.05.018}, reviewed = {1}, author = {Ziegeldorf, Jan Henrik and Matzutt, Roman and Henze, Martin and Grossmann, Fred and Wehrle, Klaus} } @Inproceedings { 2018-matzutt-bitcoin-content, title = {A Quantitative Analysis of the Impact of Arbitrary Blockchain Content on Bitcoin}, year = {2018}, month = {2}, day = {26}, abstract = {Blockchains primarily enable credible accounting of digital events, e.g., money transfers in cryptocurrencies. However, beyond this original purpose, blockchains also irrevocably record arbitrary data, ranging from short messages to pictures. This does not come without risk for users as each participant has to locally replicate the complete blockchain, particularly including potentially harmful content. We provide the first systematic analysis of the benefits and threats of arbitrary blockchain content. Our analysis shows that certain content, e.g., illegal pornography, can render the mere possession of a blockchain illegal. Based on these insights, we conduct a thorough quantitative and qualitative analysis of unintended content on Bitcoin's blockchain. Although most data originates from benign extensions to Bitcoin's protocol, our analysis reveals more than 1600 files on the blockchain, over 99\% of which are texts or images. Among these files there is clearly objectionable content such as links to child pornography, which is distributed to all Bitcoin participants. With our analysis, we thus highlight the importance for future blockchain designs to address the possibility of unintended data insertion and protect blockchain users accordingly.}, tags = {mynedata}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2018/2018_matzutt_bitcoin-contents_preproceedings-version.pdf}, web_url_date = {2018-01-07}, misc2 = {Online}, publisher = {Springer}, booktitle = {Proceedings of the 22nd International Conference on Financial Cryptography and Data Security (FC), Nieuwpoort, Cura\c{c}ao}, event_place = {Nieuwpoort, Cura\c{c}ao}, event_name = {Financial Cryptography and Data Security 2018}, language = {en}, DOI = {10.1007/978-3-662-58387-6_23}, reviewed = {1}, author = {Matzutt, Roman and Hiller, Jens and Henze, Martin and Ziegeldorf, Jan Henrik and M{\"u}llmann, Dirk and Hohlfeld, Oliver and Wehrle, Klaus} } @Inproceedings { 2018-tzimmermann-split, title = {SPLIT: Smart Protocol Loading for the IoT}, year = {2018}, month = {2}, day = {14}, tags = {iop}, url = {https://jenshiller.com/publication/2018-zimmermann-ewsn-split/2018-zimmermann-ewsn-split.pdf}, web_url = {https://dl.acm.org/citation.cfm?id=3234847.3234854}, publisher = {ACM}, booktitle = {Proceedings of the 15th European Conference on Wireless Sensor Networks (EWSN 2018), Madrid, Spain}, event_place = {Madrid, Spain}, event_name = {European Conference on Wireless Sensor Networks (EWSN 2018)}, event_date = {14.2.2018 - 16.2.2018}, language = {en}, ISBN = {978-0-9949886-2-1}, reviewed = {1}, author = {Zimmermann, Torsten and Hiller, Jens and Reelfs, Jens Helge and Hein, Pascal and Wehrle, Klaus} } @Inproceedings { 2018-dedin-energy-packets, title = {A new solution for the Energy Packet-based Dispatching using power/signal dual modulation}, year = {2018}, booktitle = {Proceedings of the Ninth International Conference on Future Energy Systems (ACM e-Energy '18)}, event_place = {Karlsruhe, Germany}, event_name = {Ninth International Conference on Future Energy Systems}, event_date = {2018-06-15}, DOI = {10.1145/3208903.3208931}, reviewed = {1}, author = {De Din, Edoardo and Monti, Antonello and Hagenmeyer, Veit and Wehrle, Klaus} } @Article { 2017-pennekamp-pmc-survey, title = {A Survey on the Evolution of Privacy Enforcement on Smartphones and the Road Ahead}, journal = {Pervasive and Mobile Computing}, year = {2017}, month = {12}, volume = {42}, pages = {58-76}, abstract = {With the increasing proliferation of smartphones, enforcing privacy of smartphone users becomes evermore important. Nowadays, one of the major privacy challenges is the tremendous amount of permissions requested by applications, which can significantly invade users' privacy, often without their knowledge. In this paper, we provide a comprehensive review of approaches that can be used to report on applications' permission usage, tune permission access, contain sensitive information, and nudge users towards more privacy-conscious behavior. We discuss key shortcomings of privacy enforcement on smartphones so far and identify suitable actions for the future.}, keywords = {Smartphones; Permission Granting; Privacy; Nudging}, tags = {trinics}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-pennekamp-pmc-survey.pdf}, misc2 = {Online}, publisher = {Elsevier}, language = {en}, ISSN = {1574-1192}, DOI = {10.1016/j.pmcj.2017.09.005}, reviewed = {1}, author = {Pennekamp, Jan and Henze, Martin and Wehrle, Klaus} } @Inproceedings { 2017-poormohammady, title = {Dynamic Algorithm Selection for the Logic of Tasks in IoT Stream Processing Systems}, journal = {13th International Conference on Network and Service Management}, year = {2017}, month = {11}, day = {26}, misc2 = {Online}, publisher = {IEEE}, booktitle = {13th International Conference on Network and Service Management, Tokyo, Japan}, language = {en}, DOI = {10.23919/CNSM.2017.8256009}, reviewed = {1}, author = {Poormohammady, Ehsan and Reelfs, Jens Helge and Stoffers, Mirko and Wehrle, Klaus and Papageorgiou, Apostolos} } @Incollection { 2017-cps-henze-network, title = {Network Security and Privacy for Cyber-Physical Systems}, year = {2017}, month = {11}, day = {13}, pages = {25-56}, tags = {sensorcloud,ipacs}, editor = {Song, Houbing and Fink, Glenn A. and Jeschke, Sabina}, publisher = {Wiley-IEEE Press}, edition = {First}, chapter = {2}, booktitle = {Security and Privacy in Cyber-Physical Systems: Foundations, Principles and Applications}, language = {en}, ISBN = {978-1-119-22604-8}, DOI = {10.1002/9781119226079.ch2}, reviewed = {1}, author = {Henze, Martin and Hiller, Jens and Hummen, Ren{\'e} and Matzutt, Roman and Wehrle, Klaus and Ziegeldorf, Jan Henrik} } @Inproceedings { 2017-henze-mobiquitous-cloudanalyzer, title = {CloudAnalyzer: Uncovering the Cloud Usage of Mobile Apps}, year = {2017}, month = {11}, day = {7}, pages = {262-271}, abstract = {Developers of smartphone apps increasingly rely on cloud services for ready-made functionalities, e.g., to track app usage, to store data, or to integrate social networks. At the same time, mobile apps have access to various private information, ranging from users' contact lists to their precise locations. As a result, app deployment models and data flows have become too complex and entangled for users to understand. We present CloudAnalyzer, a transparency technology that reveals the cloud usage of smartphone apps and hence provides users with the means to reclaim informational self-determination. We apply CloudAnalyzer to study the cloud exposure of 29 volunteers over the course of 19 days. In addition, we analyze the cloud usage of the 5000 most accessed mobile websites as well as 500 popular apps from five different countries. Our results reveal an excessive exposure to cloud services: 90 \% of apps use cloud services and 36 \% of apps used by volunteers solely communicate with cloud services. Given the information provided by CloudAnalyzer, users can critically review the cloud usage of their apps.}, keywords = {Privacy; Smartphones; Cloud Computing; Traffic Analysis}, tags = {trinics}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-henze-mobiquitous-cloudanalyzer.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 14th EAI International Conference on Mobile and Ubiquitous Systems: Computing, Networking and Services (MobiQuitous '17), November 7-10, 2017, Melbourne, VIC, Australia}, event_place = {Melbourne, VIC, Australia}, event_date = {November 7-10, 2017}, language = {en}, ISBN = {978-1-4503-5368-7}, DOI = {10.1145/3144457.3144471}, reviewed = {1}, author = {Henze, Martin and Pennekamp, Jan and Hellmanns, David and M{\"u}hmer, Erik and Ziegeldorf, Jan Henrik and Drichel, Arthur and Wehrle, Klaus} } @Inproceedings { 2017-liew-schemmel-fp, title = {Floating-Point Symbolic Execution: A Case Study in N-Version Programming}, year = {2017}, month = {10}, day = {30}, tags = {symbiosys}, url = {file:1848}, booktitle = {Proceedings of the 32nd IEEE/ACM International Conference on Automated Software Engineering}, event_place = {Urbana-Champaign, IL, USA}, language = {en}, ISBN = {978-1-5386-2684-9/17}, reviewed = {1}, author = {Liew, Daniel and Schemmel, Daniel and Cadar, Cristian and Donaldson, Alastair and Z{\"a}hl, Rafael and Wehrle, Klaus} } @Inproceedings { 2017-panchenko-wpes-fingerprinting, title = {Analysis of Fingerprinting Techniques for Tor Hidden Services}, year = {2017}, month = {10}, day = {30}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-panchenko-wpes-fingerprinting.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 16th Workshop on Privacy in the Electronic Society (WPES), co-located with the 24th ACM Conference on Computer and Communications Security (CCS), Dallas, TX, USA}, language = {en}, ISBN = {978-1-4503-5175-1}, DOI = {10.1145/3139550.3139564}, reviewed = {1}, author = {Panchenko, Andriy and Mitseva, Asya and Henze, Martin and Lanze, Fabian and Wehrle, Klaus and Engel, Thomas} } @Inproceedings { 2017-stoffers-dsrt-memo-ident, title = {Automated Memoization: Automatically Identifying Memoization Units in Simulation Parameter Studies}, year = {2017}, month = {10}, day = {18}, pages = {33-42}, keywords = {Automatic Memoization; Accelerating Parameter Studies; Performance Prediction}, tags = {memosim,symbiosys}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-stoffers-dsrt-memo-ident.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 21st IEEE/ACM International Symposium on Distributed Simulation and Real Time Applications (DS-RT 2017), Rome, Italy}, event_place = {Rome, Italy}, language = {en}, DOI = {10.1109/DISTRA.2017.8167664}, reviewed = {1}, author = {Stoffers, Mirko and Bettermann, Ralf and Wehrle, Klaus} } @Proceedings { 2017-SymPerfPoster, title = {SymPerf: Predicting Network Function Performance}, year = {2017}, month = {8}, day = {21}, tags = {spp,erc,symbiosys,reflexes}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-rath-sym-perf-poster.pdf}, publisher = {ACM}, event_place = {Los Angeles, USA}, event_name = {ACM SIGCOMM 2017 Poster}, event_date = {21.8.2017 - 25.8.2017}, language = {en}, ISBN = {978-1-4503-5057-0/17/08}, DOI = {10.1145/3123878.3131977}, reviewed = {1}, author = {Rath, Felix and Krude, Johannes and R{\"u}th, Jan and Schemmel, Daniel and Hohlfeld, Oliver and Bitsch Link, J{\'o} Agila and Wehrle, Klaus} } @Inproceedings { 2017-henze-trustcom-dcam, title = {Distributed Configuration, Authorization and Management in the Cloud-based Internet of Things}, year = {2017}, month = {8}, day = {1}, pages = {185-192}, tags = {sscilops, ipacs}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-henze-trustcom-dcam.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 16th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (IEEE TrustCom), Sydney, NSW, Australia}, language = {en}, ISBN = {978-1-5090-4905-9}, ISSN = {2324-9013}, DOI = {10.1109/Trustcom/BigDataSE/ICESS.2017.236}, reviewed = {1}, author = {Henze, Martin and Wolters, Benedikt and Matzutt, Roman and Zimmermann, Torsten and Wehrle, Klaus} } @Article { 2017-ziegeldorf-bmcmedgenomics-bloom, title = {BLOOM: BLoom filter based Oblivious Outsourced Matchings}, journal = {BMC Medical Genomics}, year = {2017}, month = {7}, day = {26}, volume = {10}, number = {Suppl 2}, pages = {29-42}, abstract = {Whole genome sequencing has become fast, accurate, and cheap, paving the way towards the large-scale collection and processing of human genome data. Unfortunately, this dawning genome era does not only promise tremendous advances in biomedical research but also causes unprecedented privacy risks for the many. Handling storage and processing of large genome datasets through cloud services greatly aggravates these concerns. Current research efforts thus investigate the use of strong cryptographic methods and protocols to implement privacy-preserving genomic computations. We propose FHE-Bloom and PHE-Bloom, two efficient approaches for genetic disease testing using homomorphically encrypted Bloom filters. Both approaches allow the data owner to securely outsource storage and computation to an untrusted cloud. FHE-Bloom is fully secure in the semi-honest model while PHE-Bloom slightly relaxes security guarantees in a trade-off for highly improved performance. We implement and evaluate both approaches on a large dataset of up to 50 patient genomes each with up to 1000000 variations (single nucleotide polymorphisms). For both implementations, overheads scale linearly in the number of patients and variations, while PHE-Bloom is faster by at least three orders of magnitude. For example, testing disease susceptibility of 50 patients with 100000 variations requires only a total of 308.31 s (\(\sigma\)=8.73 s) with our first approach and a mere 0.07 s (\(\sigma\)=0.00 s) with the second. We additionally discuss security guarantees of both approaches and their limitations as well as possible extensions towards more complex query types, e.g., fuzzy or range queries. Both approaches handle practical problem sizes efficiently and are easily parallelized to scale with the elastic resources available in the cloud. The fully homomorphic scheme, FHE-Bloom, realizes a comprehensive outsourcing to the cloud, while the partially homomorphic scheme, PHE-Bloom, trades a slight relaxation of security guarantees against performance improvements by at least three orders of magnitude.}, note = {Proceedings of the 5th iDASH Privacy and Security Workshop 2016}, keywords = {Secure outsourcing; Homomorphic encryption; Bloom filters}, tags = {sscilops;mynedata;rfc;health}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-ziegeldorf-bmcmedgenomics-bloom.pdf}, misc2 = {Online}, publisher = {BioMed Central}, event_place = {Chicago, IL, USA}, event_date = {November 11, 2016}, language = {en}, ISSN = {1755-8794}, DOI = {10.1186/s12920-017-0277-y}, reviewed = {1}, author = {Ziegeldorf, Jan Henrik and Pennekamp, Jan and Hellmanns, David and Schwinger, Felix and Kunze, Ike and Henze, Martin and Hiller, Jens and Matzutt, Roman and Wehrle, Klaus} } @Inproceedings { 2017-zimmermann-secon, title = {Resource and Execution Control for Mobile Offloadee Devices}, year = {2017}, month = {6}, day = {12}, tags = {maki}, publisher = {IEEE}, booktitle = {14th IEEE International Conference on Sensing, Communication, and Networking (SECON 2017), San Diego, USA}, event_place = {San Diego, USA}, event_name = {14th IEEE International Conference on Sensing, Communication, and Networking (SECON 2017)}, event_date = {12.06.2017 - 14.06.2017}, language = {en}, ISBN = {978-1-5090-6599-8}, DOI = {10.1109/SAHCN.2017.7964939}, reviewed = {1}, author = {Zimmermann, Torsten and Wirtz, Hanno and Ziegeldorf, Jan Henrik and Steinhaus, Christian and Wehrle, Klaus} } @Inproceedings { 2017-serror-pads-cows, title = {Code-transparent Discrete Event Simulation for Time-accurate Wireless Prototyping}, year = {2017}, month = {5}, day = {24}, tags = {memosim,symbiosys}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-serror-pads-cows.pdf}, publisher = {ACM}, howpublished = {online}, booktitle = {Proceedings of the 5th ACM SIGSIM/PADS Conference on Principles of Advanced Discrete Simulation (SIGSIM-PADS’17), Singapore, Singapore}, event_place = {Singapore, Singapore}, event_name = {5th ACM SIGSIM/PADS Conference on Principles of Advanced Discrete Simulation (SIGSIM-PADS’17)}, event_date = {May 24-26, 2017}, ISBN = {978-1-4503-4489-0}, DOI = {10.1145/3064911.3064913}, reviewed = {1}, author = {Serror, Martin and Kirchhof, J{\"o}rg Christian and Stoffers, Mirko and Wehrle, Klaus and Gross, James} } @Inproceedings { 2017-henze-ic2e-prada, title = {Practical Data Compliance for Cloud Storage}, year = {2017}, month = {4}, day = {4}, pages = {252-258}, tags = {ssiclops, ipacs}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-henze-ic2e-prada.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 2017 IEEE International Conference on Cloud Engineering (IC2E 2017), Vancouver, BC, Canada}, language = {en}, ISBN = {978-1-5090-5817-4}, DOI = {10.1109/IC2E.2017.32}, reviewed = {1}, author = {Henze, Martin and Matzutt, Roman and Hiller, Jens and M{\"u}hmer, Erik and Ziegeldorf, Jan Henrik and van der Giet, Johannes and Wehrle, Klaus} } @Inproceedings { 2017-ziegeldorf-codaspy-priward, title = {Privacy-Preserving HMM Forward Computation}, year = {2017}, month = {3}, day = {22}, pages = {83-94}, tags = {mynedata}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-ziegeldorf-codaspy-priward.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 7th ACM Conference on Data and Application Security and Privacy (CODASPY 2017), Scottsdale, AZ, USA}, language = {en}, ISBN = {978-1-4503-4523-1}, DOI = {10.1145/3029806.3029816}, reviewed = {1}, author = {Ziegeldorf, Jan Henrik and Metzke, Jan and R{\"u}th, Jan and Henze, Martin and Wehrle, Klaus} } @Proceedings { 2017-serror-netsys-industrial, title = {Demo: A Realistic Use-case for Wireless Industrial Automation and Control}, year = {2017}, month = {3}, day = {16}, tags = {koi}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/Ansari_et_al_Wireless_Industrial_Automation_Demo_NetSys_2017.pdf}, publisher = {IEEE}, event_place = {G{\"o}ttingen, Germany}, event_name = {International Conference on Networked Systems (NetSys 2017)}, DOI = {10.1109/NetSys.2017.7931496}, reviewed = {1}, author = {Ansari, Junaid and Aktas, Ismet and Brecher, Christian and Pallasch, Christoph and Hoffmann, Nicolai and Obdenbusch, Markus and Serror, Martin and Wehrle, Klaus and Gross, James} } @Inproceedings { 2017-wirtz-zimmermann-percom-etc, title = {Encrypting Data to Pervasive Contexts}, year = {2017}, month = {3}, day = {13}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-wirtz-zimmermann-percom-etc.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 2017 IEEE International Conference on Pervasive Computing and Communications (PerCom), Kona, Big Island, HI, USA}, language = {en}, ISBN = {978-1-5090-4328-6}, DOI = {10.1109/PERCOM.2017.7917877}, reviewed = {1}, author = {Wirtz, Hanno and Zimmermann, Torsten and Ceriotti, Matteo and Wehrle, Klaus} } @Inproceedings { 2017-ziegeldorf-wons-tracemixer, title = {TraceMixer: Privacy-Preserving Crowd-Sensing sans Trusted Third Party}, year = {2017}, month = {2}, day = {21}, pages = {17-24}, tags = {mynedata}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-ziegeldorf-wons-tracemixer.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 2017 13th Annual Conference on Wireless On-demand Network Systems and Services (WONS), Jackson Hole, WY, USA}, language = {en}, ISBN = {978-3-901882-88-3}, DOI = {10.1109/WONS.2017.7888771}, reviewed = {1}, author = {Ziegeldorf, Jan Henrik and Henze, Martin and Bavendiek, Jens and Wehrle, Klaus} } @Incollection { 2016-iiot-rueth-comm, title = {Communication and Networking for the Industrial Internet of Things}, year = {2017}, pages = {317-346}, misc2 = {Online}, editor = {Jeschke, Sabina and Brecher, Christian and Song, Houbing and Rawat, Danda B.}, publisher = {Springer}, booktitle = {Industrial Internet of Things}, language = {en}, ISBN = {978-3-319-42558-0}, DOI = {10.1007/978-3-319-42559-7_12}, reviewed = {1}, author = {R{\"u}th, Jan and Schmidt, Florian and Serror, Martin and Wehrle, Klaus and Zimmermann, Torsten} } @Inproceedings { 2017-matzutt-mynedata, title = {myneData: Towards a Trusted and User-controlled Ecosystem for Sharing Personal Data}, year = {2017}, pages = {1073-1084}, abstract = {Personal user data is collected and processed at large scale by a handful of big providers of Internet services. This is detrimental to users, who often do not understand the privacy implications of this data collection, as well as to small parties interested in gaining insights from this data pool, e.g., research groups or small and middle-sized enterprises. To remedy this situation, we propose a transparent and user-controlled data market in which users can directly and consensually share their personal data with interested parties for monetary compensation. We define a simple model for such an ecosystem and identify pressing challenges arising within this model with respect to the user and data processor demands, legal obligations, and technological limits. We propose myneData as a conceptual architecture for a trusted online platform to overcome these challenges. Our work provides an initial investigation of the resulting myneData ecosystem as a foundation to subsequently realize our envisioned data market via the myneData platform.}, note = {Presentation slides are in German}, keywords = {Personal User Data, Personal Information Management, Data Protection Laws, Privacy Enhancing Technologies, Platform Design, Profiling}, tags = {mynedata_show}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2017/2017-matzutt-informatik-mynedata.pdf}, web_url = {https://www.comsys.rwth-aachen.de/fileadmin/misc/mynedata/talks/2017-matzutt-informatik-mynedata-presentation.pdf}, web_url_date = {Presentation slides}, editor = {Eibl, Maximilian and Gaedke, Martin}, publisher = {Gesellschaft f{\"u}r Informatik, Bonn}, booktitle = {INFORMATIK 2017}, event_place = {Chemnitz}, event_name = {INFORMATIK 2017}, event_date = {2017-09-28}, language = {English}, ISBN = {978-3-88579-669-5}, ISSN = {1617-5468}, DOI = {10.18420/in2017_109}, reviewed = {1}, author = {Matzutt, Roman and M{\"u}llmann, Dirk and Zeissig, Eva-Maria and Horst, Christiane and Kasugai, Kai and Lidynia, Sean and Wieninger, Simon and Ziegeldorf, Jan Henrik and Gudergan, Gerhard and Spiecker gen. D{\"o}hmann, Indra and Wehrle, Klaus and Ziefle, Martina} } @Inproceedings { 2016-henze-cloudcom-trinics, title = {Towards Transparent Information on Individual Cloud Service Usage}, year = {2016}, month = {12}, day = {12}, pages = {366-370}, tags = {trinics}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2016/2016-henze-cloudcom-trinics.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 2016 IEEE International Conference on Cloud Computing Technology and Science (CloudCom), Luxembourg, Luxembourg}, language = {en}, ISBN = {978-1-5090-1445-3}, DOI = {10.1109/CloudCom.2016.0064}, reviewed = {1}, author = {Henze, Martin and Kerpen, Daniel and Hiller, Jens and Eggert, Michael and Hellmanns, David and M{\"u}hmer, Erik and Renuli, Oussama and Maier, Henning and St{\"u}ble, Christian and H{\"a}u{\ss}ling, Roger and Wehrle, Klaus} } @Inproceedings { 2016-henze-wpes-cppl, title = {CPPL: Compact Privacy Policy Language}, year = {2016}, month = {10}, day = {24}, pages = {99-110}, tags = {ssiclops}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2016/2016-henze-wpes-cppl.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 15th Workshop on Privacy in the Electronic Society (WPES), co-located with the 23rd ACM Conference on Computer and Communications Security (CCS), Vienna, Austria}, language = {en}, ISBN = {978-1-4503-4569-9}, DOI = {10.1145/2994620.2994627}, reviewed = {1}, author = {Henze, Martin and Hiller, Jens and Schmerling, Sascha and Ziegeldorf, Jan Henrik and Wehrle, Klaus} } @Inproceedings { 2016-mitseva-ccs-fingerprinting, title = {POSTER: Fingerprinting Tor Hidden Services}, year = {2016}, month = {10}, day = {24}, pages = {1766-1768}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2016/2016-mitseva-ccs-fingerprinting.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 23rd ACM Conference on Computer and Communications Security (CCS), Vienna, Austria}, language = {en}, ISBN = {978-1-4503-4139-4}, DOI = {10.1145/2976749.2989054}, reviewed = {1}, author = {Mitseva, Asya and Panchenko, Andriy and Lanze, Fabian and Henze, Martin and Wehrle, Klaus and Engel, Thomas} } @Inproceedings { 2016-matzutt-ccs-bitcoin, title = {POSTER: I Don't Want That Content! On the Risks of Exploiting Bitcoin's Blockchain as a Content Store}, year = {2016}, month = {10}, day = {24}, pages = {1769-1771}, tags = {mynedata}, url = {/fileadmin/papers/2016/2016-matzutt-ccs-blockchaincontent.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 23rd ACM Conference on Computer and Communications Security (CCS), Vienna, Austria}, language = {en}, ISBN = {978-1-4503-4139-4}, DOI = {10.1145/2976749.2989059}, reviewed = {1}, author = {Matzutt, Roman and Hohlfeld, Oliver and Henze, Martin and Rawiel, Robin and Ziegeldorf, Jan Henrik and Wehrle, Klaus} } @Inproceedings { 2016-ackermann-healthcom-eeg-emotion, title = {EEG-based Automatic Emotion Recognition: Feature Extraction, Selection and Classification Methods}, year = {2016}, month = {9}, day = {14}, pages = {159--164}, abstract = {Automatic emotion recognition is an interdisciplinary research field which deals with the algorithmic detection of human affect, e.g. anger or sadness, from a variety of sources, such as speech or facial gestures. Apart from the obvious usage for industry applications in human-robot interaction, acquiring the emotional state of a person automatically also is of great potential for the health domain, especially in psychology and psychiatry. Here, evaluation of human emotion is often done using oral feedback or questionnaires during doctor-patient sessions. However, this can be perceived as intrusive by the patient. Furthermore, the evaluation can only be done in a non-continuous manner, e.g. once a week during therapy sessions. In contrast, using automatic emotion detection, the affect state of a person can be evaluated in a continuous non-intrusive manner, for example to detect early on-sets of depression. An additional benefit of automatic emotion recognition is the objectivity of such an approach, which is not influenced by the perception of the patient and the doctor. To reach the goal of objectivity, it is important, that the source of the emotion is not easily manipulable, e.g. as in the speech modality. To circumvent this caveat, novel approaches in emotion detection research the potential of using physiological measures, such as galvanic skin sensors or pulse meters. In this paper we outline a way of detecting emotion from brain waves, i.e., EEG data. While EEG allows for a continuous, real-time automatic emotion recognition, it furthermore has the charm of measuring the affect close to the point of emergence: the brain. Using EEG data for emotion detection is nevertheless a challenging task: Which features, EEG channel locations and frequency bands are best suited for is an issue of ongoing research. In this paper we evaluate the use of state of the art feature extraction, feature selection and classification algorithms for EEG emotion classification using data from the de facto standard dataset, DEAP. Moreover, we present results that help choose methods to enhance classification performance while simultaneously reducing computational complexity.}, url = {/fileadmin/papers/2016/2016-ackermann-healthcom-emorec.pdf}, web_url2 = {http://ieeehealthcom2016.com/}, misc2 = {Online}, publisher = {IEEE}, booktitle = {2016 IEEE 18th International Conference on e-Health Networking, Applications and Services (Healthcom)}, event_place = {Munich, Germany}, event_name = {2016 IEEE 18th International Conference on e-Health Networking, Applications and Services (Healthcom)}, event_date = {September 14-17, 2016}, language = {en}, ISBN = {978-1-5090-3370-6}, reviewed = {1}, author = {Ackermann, Pascal and Kohlschein, Christian and Bitsch Link, J{\'o} Agila and Wehrle, Klaus and Jeschke, Sabina} } @Article { 2015-cheng-piap-jmu, title = {Psychologist in a Pocket: Lexicon Development and Content Validation of a Mobile-Based App for Depression Screening}, journal = {JMIR Mhealth Uhealth}, year = {2016}, month = {7}, day = {20}, volume = {4}, number = {3}, pages = {e88}, tags = {piap}, web_url = {http://mhealth.jmir.org/2016/3/e88/}, web_url2 = {http://www.ncbi.nlm.nih.gov/pubmed/27439444}, misc2 = {Online}, language = {en}, ISSN = {2291-5222}, DOI = {10.2196/mhealth.5284}, reviewed = {1}, author = {Cheng, Paula Glenda Ferrer and Ramos, Roann Munoz and Bitsch Link, J{\'o} Agila and Jonas, Stephan Michael and Ix, Tim and See, Portia Lynn Quetulio and Wehrle, Klaus} } @Techreport { 2016-henze-aib-sensorcloud, title = {The SensorCloud Protocol: Securely Outsourcing Sensor Data to the Cloud}, year = {2016}, month = {7}, day = {11}, number = {AIB-2016-06}, number2 = {arXiv:1607.03239 [cs.NI]}, pages = {1--24}, tags = {sensorcloud}, url = {fileadmin/papers/2016/2016-henze-aib-sensorcloud.pdf}, misc2 = {Online}, publisher = {Department of Computer Science, RWTH Aachen University}, address = {Ahornstr. 55, 52074 Aachen, Germany}, institution = {Department of Computer Science, RWTH Aachen University}, type = {Technical Report}, language = {en}, ISSN = {0935-3232}, author = {Henze, Martin and Hummen, Ren{\'e} and Matzutt, Roman and Wehrle, Klaus} } @Inproceedings { 2016-serror-wowmom-arq, title = {Performance Analysis of Cooperative ARQ Systems for Wireless Industrial Networks}, year = {2016}, month = {6}, day = {21}, tags = {koi}, publisher = {IEEE}, howpublished = {online}, booktitle = {17th IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (IEEE WoWMoM 2016), Coimbra, Portugal}, event_place = {Coimbra, Portugal}, language = {en}, DOI = {10.1109/WoWMoM.2016.7523534}, reviewed = {1}, author = {Serror, Martin and Hu, Yulin and Dombrowski, Christian and Wehrle, Klaus and Gross, James} } @Inproceedings { 2016-werner-networking-stean, title = {STEAN: A Storage and Transformation Engine for Advanced Networking Context}, year = {2016}, month = {5}, day = {17}, tags = {maki}, publisher = {IEEE}, booktitle = {Proceedings of the 15th International IFIP Networking Conference (NETWORKING'16), Vienna, Austira}, event_place = {Vienna, Austria}, event_name = {IFIP Networking 2016}, event_date = {17.-19.5.2016}, ISBN = {978-3-9018-8283-8}, DOI = {10.1109/IFIPNetworking.2016.7497203}, reviewed = {1}, author = {Werner, Marc and Schwandtke, Johannes and Hollick, Matthias and Hohlfeld, Oliver and Zimmermann, Torsten and Wehrle, Klaus} } @Inproceedings { 2016-stoffers-pads-memo, title = {Automated Memoization for Parameter Studies Implemented in Impure Languages}, year = {2016}, month = {5}, day = {15}, pages = {221-232}, note = {Best Paper Award}, keywords = {Automatic Memoization; Accelerating Parameter Studies; Impure Languages}, tags = {memosim,symbiosys}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2016/2016-stoffers-pads-memoization.pdf}, misc2 = {Online}, publisher = {ACM}, address = {New York, NY}, booktitle = {Proceedings of the 4th ACM SIGSIM/PADS Conference on Principles of Advanced Discrete Simulation (SIGSIM-PADS’16), Banff, AB, Canada}, event_place = {Banff, AB, Canada}, language = {en}, DOI = {10.1145/2901378.2901386}, reviewed = {1}, author = {Stoffers, Mirko and Schemmel, Daniel and Soria Dustmann, Oscar and Wehrle, Klaus} } @Inproceedings { 2016-zimmermann-remp, title = {ReMP TCP: Low Latency Multipath TCP}, year = {2016}, month = {5}, publisher = {IEEE}, booktitle = {Proceedings of the IEEE International Conference on Communications (ICC 2016), Kuala Lumpur, Malaysia}, event_place = {Kuala Lumpur, Malaysia}, event_name = {ICC 2016}, event_date = {23.-27.5.2016}, ISBN = {978-1-4799-6664-6}, ISSN = {1938-1883}, DOI = {10.1109/ICC.2016.7510787}, reviewed = {1}, author = {Fr{\"o}mmgen, Alexander and Erbsh{\"a}user, Tobias and Zimmermann, Torsten and Wehrle, Klaus and Buchmann, Alejandro} } @Inproceedings { 2016-henze-claw-dpc, title = {Moving Privacy-Sensitive Services from Public Clouds to Decentralized Private Clouds}, year = {2016}, month = {4}, day = {8}, pages = {130-135}, tags = {ssiclops}, url = {/fileadmin/papers/2016/2016-henze-claw-dpc.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the Second International Workshop on Legal and Technical Issues in Cloud Computing and Cloud-Supported Internet of Things (CLaw 2016), co-located with the 2016 IEEE International Conference on Cloud Engineering (IC2E 2016), Berlin, Germany}, language = {en}, ISBN = {978-1-5090-3684-4}, DOI = {10.1109/IC2EW.2016.24}, reviewed = {1}, author = {Henze, Martin and Hiller, Jens and Hohlfeld, Oliver and Wehrle, Klaus} } @Article { 2016-fgcs-henze-iotprivacy, title = {A Comprehensive Approach to Privacy in the Cloud-based Internet of Things}, journal = {Future Generation Computer Systems}, year = {2016}, month = {3}, volume = {56}, pages = {701-718}, tags = {ipacs}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2016/2016-henze-fgcs-iotprivacy.pdf}, misc2 = {Online}, publisher = {Elsevier}, language = {en}, ISSN = {0167-739X}, DOI = {10.1016/j.future.2015.09.016}, reviewed = {1}, author = {Henze, Martin and Hermerschmidt, Lars and Kerpen, Daniel and H{\"a}u{\ss}ling, Roger and Rumpe, Bernhard and Wehrle, Klaus} } @Inproceedings { 2016-panchenko-ndss-fingerprinting, title = {Website Fingerprinting at Internet Scale}, year = {2016}, month = {2}, day = {21}, abstract = {The website fingerprinting attack aims to identify the content (i.e., a webpage accessed by a client) of encrypted and anonymized connections by observing patterns of data flows such as packet size and direction. This attack can be performed by a local passive eavesdropper – one of the weakest adversaries in the attacker model of anonymization networks such as Tor. In this paper, we present a novel website fingerprinting attack. Based on a simple and comprehensible idea, our approach outperforms all state-of-the-art methods in terms of classification accuracy while being computationally dramatically more efficient. In order to evaluate the severity of the website fingerprinting attack in reality, we collected the most representative dataset that has ever been built, where we avoid simplified assumptions made in the related work regarding selection and type of webpages and the size of the universe. Using this data, we explore the practical limits of website fingerprinting at Internet scale. Although our novel approach is by orders of magnitude computationally more efficient and superior in terms of detection accuracy, for the first time we show that no existing method – including our own – scales when applied in realistic settings. With our analysis, we explore neglected aspects of the attack and investigate the realistic probability of success for different strategies a real-world adversary may follow.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2016/2016-panchenko-ndss-fingerprinting.pdf}, web_url = {https://www.informatik.tu-cottbus.de/\verb=~=andriy/zwiebelfreunde/}, publisher = {Internet Society}, booktitle = {Proceedings of the 23rd Annual Network and Distributed System Security Symposium (NDSS '16), February 21-24, 2016, San Diego, CA, USA}, event_place = {San Diego, CA, USA}, event_date = {February 21-24, 2016}, ISBN = {978-1-891562-41-9}, DOI = {10.14722/ndss.2016.23477}, reviewed = {1}, author = {Panchenko, Andriy and Lanze, Fabian and Zinnen, Andreas and Henze, Martin and Pennekamp, Jan and Wehrle, Klaus and Engel, Thomas} } @Article { 2016-kunz-tomacs-horizon, title = {Parallel Expanded Event Simulation of Tightly Coupled Systems}, journal = {ACM Transactions on Modeling and Computer Simulation (TOMACS)}, year = {2016}, month = {1}, volume = {26}, number = {2}, pages = {12:1--12:26}, abstract = {The technical evolution of wireless communication technology and the need for accurately modeling these increasingly complex systems causes a steady growth in the complexity of simulation models. At the same time, multi-core systems have become the de facto standard hardware platform. Unfortunately, wireless systems pose a particular challenge for parallel execution due to a tight coupling of network entities in space and time. Moreover, model developers are often domain experts with no in-depth understanding of parallel and distributed simulation. In combination, both aspects severely limit the performance and the efficiency of existing parallelization techniques. We address these challenges by presenting parallel expanded event simulation, a novel modeling paradigm that extends discrete events with durations which span a period in simulated time. The resulting expanded events form the basis for a conservative synchronization scheme that considers overlapping expanded events eligible for parallel processing. We furthermore put these concepts into practice by implementing Horizon, a parallel expanded event simulation framework specifically tailored to the characteristics of multi-core systems. Our evaluation shows that Horizon achieves considerable speedups in synthetic as well as real-world simulation models and considerably outperforms the current state-of-the-art in distributed simulation.}, keywords = {Parallel discrete event simulation, Multi-core Systems, Wireless Systems, Simulation Modeling Paradigm, Conservative Synchronization}, tags = {horizon}, publisher = {ACM}, language = {en}, DOI = {10.1145/2832909}, reviewed = {1}, author = {Kunz, Georg and Stoffers, Mirko and Landsiedel, Olaf and Wehrle, Klaus and Gross, James} } @Inproceedings { 2016-zimmermann-wons-mirco, title = {Maintaining Integrity and Reputation in Content Offloading}, year = {2016}, month = {1}, pages = {25-32}, tags = {maki}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2016/2016-zimmermann-wons-mirco.pdf}, publisher = {IEEE}, booktitle = {12th International Conference on Wireless On-demand Network Systems and Services (WONS), Cortina d'Ampezzo, Italy}, event_place = {Cortina d'Ampezzo, Italy}, event_name = {12th International Conference on Wireless On-demand Network Systems and Services (WONS)}, event_date = {January 20 - 22 2016}, language = {en}, ISBN = {978-3-901882-80-7}, reviewed = {1}, author = {Zimmermann, Torsten and R{\"u}th, Jan and Wirtz, Hanno and Wehrle, Klaus} } @Inproceedings { 2015-ziegeldorf-cans-boma, title = {Bandwidth-optimized Secure Two-Party Computation of Minima}, year = {2015}, month = {12}, day = {8}, volume = {9476}, pages = {197-213}, url = {/fileadmin/papers/2015/2015-ziegeldorf-cans-boma.pdf}, misc2 = {Online}, publisher = {Springer}, series = {Lecture Notes in Computer Science}, booktitle = {14th International Conference on Cryptology and Network Security (CANS 2015), Marrakesh, Morocco}, language = {en}, ISBN = {978-3-319-26822-4}, DOI = {10.1007/978-3-319-26823-1_14}, reviewed = {1}, author = {Ziegeldorf, Jan Henrik and Hiller, Jens and Henze, Martin and Wirtz, Hanno and Wehrle, Klaus} } @Inproceedings { 2015-zimmermann-remp, title = {Remp TCP: Low latency Multipath TCP}, year = {2015}, month = {12}, day = {1}, publisher = {ACM}, booktitle = {Proceedings of the 2015 CoNEXT on Student Workshop, CoNEXT Student Workshop, Heidelberg, Germany}, event_place = {Heidelberg, Germany}, event_name = {CoNEXT 2015}, event_date = {1.-4.12.2015}, reviewed = {1}, author = {Fr{\"o}mmgen, Alexander and Erbsh{\"a}user, Tobias and Zimmermann, Torsten and Wehrle, Klaus and Buchmann, Alejandro} } @Inproceedings { 2015-serror-channel-coding, title = {Channel Coding Versus Cooperative ARQ: Reducing Outage Probability in Ultra-Low Latency Wireless Communications}, year = {2015}, month = {12}, tags = {koi}, url = {file:1704}, publisher = {IEEE}, howpublished = {online}, booktitle = {IEEE GC 2015 Workshop on Ultra-Low Latency and Ultra-High Reliability in Wireless Communications (GC'15 - ULTRA2), San Diego, USA}, event_place = {San Diego, USA}, event_name = {IEEE GC 2015 Workshop on Ultra-Low Latency and Ultra-High Reliability in Wireless Communications}, event_date = {December 6-10 2015}, DOI = {10.1109/GLOCOMW.2015.7414150}, reviewed = {1}, author = {Serror, Martin and Dombrowski, Christian and Wehrle, Klaus and Gross, James} } @Inproceedings { 2015-stoffers-mswim-data-deps, title = {Data Dependency based Parallel Simulation of Wireless Networks}, year = {2015}, month = {11}, day = {2}, pages = {291-300}, abstract = {Simulation of wireless systems is highly complex and can only be efficient if the simulation is executed in parallel. To this end, independent events have to be identified to enable their simultaneous execution. Hence, the number of events identified as independent needs to be maximized in order to increase the level of parallelism. Traditionally, dependencies are determined only by time and location of events: If two events take place on the same simulation entity, they must be simulated in timestamp order. Our approach to overcome this limitation is to also investigate data-dependencies between events. This enables event reordering and parallelization even for events at the same simulation entity. To this end, we design the simulation language PSimLa, which aids this process. In this paper, we discuss the PSimLa design and compiler as well as our data-dependency analysis approach in detail and present case studies of wireless network models, speeded up by a factor of 10 on 12 cores where time-based parallelization only achieves a 1.6x speedup.}, note = {Best Paper Award}, keywords = {Parallel simulation; Static code analysis; Data dependencies}, tags = {horizon}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2015/2015-stoffers-mswim-data-deps.pdf}, misc2 = {Online}, publisher = {ACM}, address = {New York, NY}, booktitle = {Proceedings of the 18th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems, Canc{\'u}n, Mexico (MSWiM'15)}, event_place = {Canc{\'u}n, Mexico}, language = {en}, DOI = {10.1145/2811587.2811593}, reviewed = {1}, author = {Stoffers, Mirko and Sehy, Torsten and Gross, James and Wehrle, Klaus} } @Inproceedings { 2015-wirtz-wifi-sharing, title = {Collaborative On-demand Wi-Fi Sharing}, year = {2015}, month = {10}, pages = {19-27}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2015/2015-wirtz-lcn-cows.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {40th IEEE Conference on Local Computer Networks (LCN), Clearwater Beach, USA}, event_place = {Clearwater Beach, Florida, USA}, event_name = {40th IEEE Conference on Local Computer Networks (LCN)}, event_date = {October 26-29 2015}, language = {en}, DOI = {10.1109/LCN.2015.7366279}, reviewed = {1}, author = {Wirtz, Hanno and Zimmermann, Torsten and Serror, Martin and Wehrle, Klaus} } @Poster { serror-zdn-2015, title = {How to Benefit from Cooperation in Latency-Constrained Wireless Communications}, year = {2015}, month = {9}, day = {25}, tags = {cps,koi,hodrian}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2015/2015-serror-zdn-cooperation.pdf}, web_url = {http://kn.inf.uni-tuebingen.de/itg-zdn-2015-poster-session}, publisher = {VDE}, howpublished = {online}, organization = {ITG-Fachtagung ''Zukunft der Netze 2015'' – Poster Session, T{\"u}bingen, Germany}, event_place = {T{\"u}bingen, Germany}, author = {Serror, Martin and Dombrowski, Christian and Wehrle, Klaus and Gross, James} } @Inproceedings { 2015-ziegeldorf-dpm-comparison, title = {Comparison-based Privacy: Nudging Privacy in Social Media (Position Paper)}, year = {2015}, month = {9}, day = {22}, volume = {9481}, pages = {226-234}, url = {fileadmin/papers/2015/2015-ziegeldorf-dpm-cbp.pdf}, misc2 = {Online}, publisher = {Springer}, series = {Lecture Notes in Computer Science}, booktitle = {The 10th DPM International Workshop on Data Privacy Management, Vienna, Austria}, language = {en}, ISBN = {978-3-319-29882-5}, DOI = {10.1007/978-3-319-29883-2_15}, reviewed = {1}, author = {Ziegeldorf, Jan Henrik and Henze, Martin and Hummen, Ren{\'e} and Wehrle, Klaus} } @Inproceedings { 2015-schmidt-santa, title = {Santa: Faster Packet Delivery for Commonly Wished Replies [Poster Abstract]}, year = {2015}, month = {8}, day = {19}, tags = {ssiclops}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2015/2015-schmidt-sigcomm-santa.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 43rd ACM SIGCOMM Conference (SIGCOMM '15), London, United Kingdom}, event_place = {London, United Kingdom}, event_name = {43rd ACM SIGCOMM Conference (SIGCOMM '15)}, event_date = {17–21 August, 2015}, language = {en}, DOI = {10.1145/2785956.2790014}, reviewed = {1}, author = {Schmidt, Florian and Hohlfeld, Oliver and Glebke, Ren{\'e} and Wehrle, Klaus} } @Inproceedings { 2015-ahfe-kowalewski-facebook, title = {Like us on Facebook! - Analyzing user preferences regarding privacy settings in Germany}, journal = {Procedia Manufacturing}, year = {2015}, month = {7}, volume = {3}, pages = {815--822}, publisher = {Elsevier}, booktitle = {The 6th International Conference on Applied Humand Factors and Ergonomics (AHFE 2015), Las Vegas, NV, USA}, language = {en}, ISSN = {2351-9789}, DOI = {10.1016/j.promfg.2015.07.336}, reviewed = {1}, author = {Kowalewski, Sylvia and Ziefle, Martina and Ziegeldorf, Jan Henrik and Wehrle, Klaus} } @Inproceedings { 2015-wirtz-secon, title = {Enabling Ubiquitous Interaction with Smart Things}, year = {2015}, month = {6}, day = {24}, pages = {256-264}, tags = {maki}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2015/2015-wirtz-secon-stif.pdf}, web_url = {http://www.comsys.rwth-aachen.de/short/secon15-stif}, misc2 = {Online}, publisher = {IEEE}, booktitle = {12th IEEE International Conference on Sensing, Communication, and Networking (SECON 2015), Seattle, USA}, event_place = {Seattle, USA}, event_name = {12th IEEE International Conference on Sensing, Communication, and Networking (SECON 2015)}, event_date = {22.06.2015 - 25.06.2015}, language = {en}, DOI = {10.1109/SAHCN.2015.7338324}, reviewed = {1}, author = {Wirtz, Hanno and R{\"u}th, Jan and Serror, Martin and Zimmermann, Torsten and Wehrle, Klaus} } @Inproceedings { 2015-stoffers-pads-data-deps, title = {Analyzing Data Dependencies for Increased Parallelism in Discrete Event Simulation}, year = {2015}, month = {6}, day = {10}, pages = {73-74}, tags = {horizon}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2015/2015-stoffers-pads-data-deps.pdf}, misc2 = {Online}, publisher = {ACM}, address = {New York, NY}, booktitle = {Proceedings of the 3rd ACM SIGSIM/PADS Conference on Principles of Advanced Discrete Simulation (SIGSIM-PADS’15), London, United Kingdom}, event_place = {London, United Kingdom}, language = {en}, DOI = {10.1145/2769458.2769487}, reviewed = {1}, author = {Stoffers, Mirko and Sehy, Torsten and Gross, James and Wehrle, Klaus} } @Inproceedings { 2015-bitsch-phealth-piap, title = {Psychologist in a Pocket: Towards Depression Screening on Mobile Phones}, year = {2015}, month = {6}, day = {2}, volume = {211}, pages = {153 --159}, abstract = {Depression is the most prevalent clinical disorder and one of the main causes of disability. This makes early detection of depressive symptoms critical in its prevention and management. This paper presents and discusses the development of Psychologist in a Pocket (PiaP), a mental mHealth application for Android which screens and monitors for these symptoms, and–given the explicit permission of the user–alerts a trusted contact such as the mental health professional or a close friend, if it detects symptoms. All text inputted electronically–such as short message services, emails, social network posts–is analyzed based on keywords related to depression based on DSM-5 and ICD criteria as well as Beck's Cognitive Theory of Depression and the Self-Focus Model. Data evaluation and collection happen in the background, on- device, without requiring any user involvement. Currently, the application is in an early prototype phase entering initial clinical validation.}, url = {fileadmin/papers/2015/2015-bitsch-phealth-piap.pdf}, misc = {Print}, editor = {Blobel, Bernd and Lind{\'e}n, Maria and Ahmed, Mobyen Uddin}, publisher = {IOS Press}, address = {Amsterdam}, series = {Studies in Health Technology and Informatics}, booktitle = {Proceedings of the 12th International Conference on Wearable Micro and Nano Technologies for Personalized Health}, event_place = {V{\"a}ster{\aa}s, Sweden}, event_name = {12th International Conference on Wearable Micro and Nano Technologies for Personalized Health}, event_date = {June 2-4, 2015}, language = {en}, ISBN = {978-1-61499-515-9}, ISSN = {0926-9630}, DOI = {10.3233/978-1-61499-516-6-153}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Ramos, Roann and Ix, Tim and Ferrer Cheng, Paula Glenda and Wehrle, Klaus} } @Inproceedings { 2015-bitsch-phealth-brain, title = {Towards Brain Research in a Pocket: Bringing EEG Research and Diagnostics out of the Lab}, year = {2015}, month = {6}, day = {2}, volume = {211}, pages = {185 -- 190}, abstract = {Bringing brain research tools like EEG devices out of the lab into the pockets of practitioners and researchers may fundamentally change the way we perform diagnostics and research. While most of the current techniques are limited to research clinics and require excessive set-up, new consumer EEG devices connected to standard, off-the-shelf mobile devices allow us to lift these limitations. This allows neuropsychological assessment and research in mobile settings, possibly even in remote areas with limited accessibility and infrastructure, thus bringing the equip- ment to the patient, instead of bringing the patient to the equipment. We are developing an Android based mobile framework to perform EEG studies. By connecting a mobile consumer EEG headset directly to an unmodified mobile device, presenting auditory and visual stimuli, as well as user interaction, we create a self-contained experimental plat- form. We complement this platform by a toolkit for immediate evalua- tion of the recorded data directly on the device, even without internet connectivity. Initial results from the replication of two Event Related Potentials studies indicate the feasibility of the approach.}, url = {fileadmin/papers/2015/2015-bitsch-phealth-brain.pdf}, misc = {Print}, editor = {Blobel, Bernd and Lind{\'e}n, Maria and Ahmed, Mobyen Uddin}, publisher = {IOS Press}, address = {Amsterdam}, series = {Studies in Health Technology and Informatics}, booktitle = {Proceedings of the 12th International Conference on Wearable Micro and Nano Technologies for Personalized Health}, event_place = {V{\"a}ster{\aa}s, Sweden}, event_name = {12th International Conference on Wearable Micro and Nano Technologies for Personalized Health}, event_date = {June 2-4, 2015}, language = {en}, ISBN = {978-1-61499-515-9}, ISSN = {0926-9630}, DOI = {10.3233/978-1-61499-516-6-185}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Ramos, Roann and Severijns, Cassandra and Wehrle, Klaus} } @Inproceedings { 2015-ziegeldorf-iwpe-comparison, title = {Choose Wisely: A Comparison of Secure Two-Party Computation Frameworks}, year = {2015}, month = {5}, day = {21}, pages = {198-205}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2015/2015-ziegeldorf-iwpe-choose.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {2015 International Workshop on Privacy Engineering (IWPE'15), part of 2015 IEEE Security and Privacy Workshops (SPW 2015), San Jose, CA, USA}, language = {en}, DOI = {10.1109/SPW.2015.9}, reviewed = {1}, author = {Ziegeldorf, Jan Henrik and Metzke, Jan and Henze, Martin and Wehrle, Klaus} } @Proceedings { 2015-sdnflex-heuschkel-dyns, title = {Protocol Virtualization through Dynamic Network Stacks}, year = {2015}, month = {3}, day = {9}, publisher = {IEEE}, event_place = {Cottbus}, event_name = {SDNFlex Workshop (NetSys 2015)}, event_date = {March 2015, 9-12}, language = {en}, DOI = {10.1109/NetSys.2015.7089055}, reviewed = {1}, author = {Heuschkel, Jens and Schweizer, Immanuel and Zimmermann, Torsten and Wehrle, Klaus and M{\"u}hlh{\"a}user, Max} } @Inproceedings { 2014-ziegeldorf-codaspy-coinparty, title = {CoinParty: Secure Multi-Party Mixing of Bitcoins}, year = {2015}, month = {3}, day = {2}, tags = {rfc}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2015/2015-ziegeldorf-codaspy-coinparty.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {The Fifth ACM Conference on Data and Application Security and Privacy (CODASPY 2015), San Antonio, TX, USA}, event_place = {San Antonio, TX, USA}, event_name = {The Fifth ACM Conference on Data and Application Security and Privacy (CODASPY 2015)}, language = {en}, ISBN = {978-1-4503-3191-3}, DOI = {10.1145/2699026.2699100}, reviewed = {1}, author = {Ziegeldorf, Jan Henrik and Grossmann, Fred and Henze, Martin and Inden, Nicolas and Wehrle, Klaus} } @Inproceedings { 2015-ewsn-schmidt-canttaketheheat, title = {If You Can't Take The Heat: Temperature Effects On Low-Power Wireless Networks And How To Mitigate Them}, year = {2015}, month = {2}, day = {10}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2015/2015-schmidt-ewsn-canttaketheheat.pdf}, misc2 = {Online}, publisher = {Springer}, booktitle = {Proceedings of the 12th European Conference on Wireless Sensor Networks (EWSN 2015), Porto, Portugal}, event_place = {Porto, Portugal}, event_name = {12th European Conference on Wireless Sensor Networks (EWSN 2015)}, event_date = {9-11 February, 2015}, language = {en}, ISBN = {978-3-319-15581-4}, DOI = {10.1007/978-3-319-15582-1_19}, reviewed = {1}, author = {Schmidt, Florian and Ceriotti, Matteo and Hauser, Niklas and Wehrle, Klaus} } @Incollection { 2014-tcc-henze-trustpoint, title = {A Trust Point-based Security Architecture for Sensor Data in the Cloud}, year = {2014}, month = {12}, day = {14}, pages = {77-106}, tags = {sensorcloud}, misc2 = {Online}, editor = {Krcmar, Helmut and Reussner, Ralf and Rumpe, Bernhard}, publisher = {Springer}, booktitle = {Trusted Cloud Computing}, ISBN = {978-3-319-12717-0}, DOI = {10.1007/978-3-319-12718-7_6}, reviewed = {1}, author = {Henze, Martin and Hummen, Ren{\'e} and Matzutt, Roman and Wehrle, Klaus} } @Incollection { 2013-wtc-eggert-sensorcloud, title = {SensorCloud: Towards the Interdisciplinary Development of a Trustworthy Platform for Globally Interconnected Sensors and Actuators}, year = {2014}, month = {12}, day = {14}, pages = {203-218}, tags = {sensorcloud}, url = {fileadmin/papers/2013/2013-wtc-eggert-sensorcloud.pdf}, misc2 = {Online}, editor = {Krcmar, Helmut and Reussner, Ralf and Rumpe, Bernhard}, publisher = {Springer}, booktitle = {Trusted Cloud Computing}, language = {en}, ISBN = {978-3-319-12717-0}, DOI = {10.1007/978-3-319-12718-7_13}, reviewed = {1}, author = {Eggert, Michael and H{\"a}u{\ss}ling, Roger and Henze, Martin and Hermerschmidt, Lars and Hummen, Ren{\'e} and Kerpen, Daniel and Navarro P{\'e}rez, Antonio and Rumpe, Bernhard and Thi{\ss}en, Dirk and Wehrle, Klaus} } @Techreport { 2015-aib-schmidt-hotbox, title = {HotBox: Testing Temperature Effects in Sensor Networks}, year = {2014}, month = {12}, day = {4}, number = {AIB-2014-14}, number2 = {arXiv:1412.2257 [cs.NI]}, pages = {1--17}, tags = {senserr}, url = {fileadmin/papers/2014/2014-schmidt-aib-hotbox.pdf}, misc2 = {Online}, publisher = {Department of Computer Science, RWTH Aachen}, address = {Ahornstr. 55, 52074 Aachen, Germany}, institution = {Department of Computer Science, RWTH Aachen}, type = {Technical Report}, language = {en}, ISSN = {0935-3232}, author = {Schmidt, Florian and Ceriotti, Matteo and Hauser, Niklas and Wehrle, Klaus} } @Inproceedings { 2014-wirtz-mum-dcmv, title = {Facilitating Direct and Ubiquitous Mobile Computer Vision}, year = {2014}, month = {11}, day = {27}, url = {fileadmin/papers/2014/2014-wirtz-mum-mcv.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {The 13th International Conference on Mobile and Ubiquitous Multimedia (MUM 2014), Melbourne, Australia}, event_place = {Melbourne, Australia}, event_name = {The 13th International Conference on Mobile and Ubiquitous Multimedia (MUM 2014)}, language = {en}, ISBN = {978-1-4503-3304-7}, DOI = {10.1145/2677972.2677974}, reviewed = {1}, author = {Wirtz, Hanno and R{\"u}th, Jan and Wehrle, Klaus} } @Inproceedings { 2014-mass-wirtz-mafi, title = {High-performance, Energy-efficient Mobile Wireless Networking in 802.11 Infrastructure Mode}, year = {2014}, month = {10}, url = {fileadmin/papers/2014/2014-wirtz-mass-mafi.pdf}, misc2 = {Online}, publisher = {IEEE Computer Society}, booktitle = {Proceedings of The 11th IEEE International Conference on Mobile Ad-hoc and Sensor Systems (IEEE MASS 2014), Philadelphia, PA, USA}, event_place = {Philadelphia, USA}, event_name = {11th IEEE International Conference on Mobile Ad-hoc and Sensor Systems (IEEE MASS 2014)}, event_date = {27 - 30 October 2014}, language = {en}, ISBN = {978-1-4799-6035-4}, DOI = {10.1109/MASS.2014.21}, reviewed = {1}, author = {Wirtz, Hanno and Kunz, Georg and Laudenberg, Johannes and Backhaus, Robert and Wehrle, Klaus} } @Proceedings { 2014-kuvs-zimmermann-mindgap, title = {Mind the Gap – Understanding the Traffic Gap when Switching Communication Protocols}, year = {2014}, month = {9}, day = {29}, event_place = {Stuttgart}, event_name = {1st KuVS Workshop on Anticipatory Networks}, event_date = {September 29-30, 2014}, reviewed = {1}, author = {Werner, Marc and Lange, Tobias and Hollick, Matthias and Zimmermann, Torsten and Wehrle, Klaus} } @Inproceedings { 2014-aasnet-henze-scslib, title = {SCSlib: Transparently Accessing Protected Sensor Data in the Cloud}, year = {2014}, month = {9}, day = {24}, volume = {37}, pages = {370-375}, tags = {sensorcloud}, url = {/fileadmin/papers/2014/2014-henze-aasnet-scslib.pdf}, misc2 = {Online}, publisher = {Elsevier}, series = {Procedia Computer Science}, booktitle = {The 6th International Symposium on Applications of Ad hoc and Sensor Networks (AASNET'14), Halifax, NS, Canada}, event_place = {Halifax, NS, Canada}, event_name = {The 6th International Symposium on Applications of Ad hoc and Sensor Networks (AASNET'14)}, language = {en}, DOI = {10.1016/j.procs.2014.08.055}, reviewed = {1}, author = {Henze, Martin and Bereda, Sebastian and Hummen, Ren{\'e} and Wehrle, Klaus} } @Inproceedings { 2014-aktas-wintech-a-framework-for-remote-automation-configuration-and-monitoring, title = {A Framework for Remote Automation, Configuration, and Monitoring of Real-World Experiments}, year = {2014}, month = {9}, day = {7}, pages = {1--8}, tags = {crawler}, url = {fileadmin/papers/2014/2014-aktas-wintech-remote-cross-layer.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 9th ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation and Characterization (WiNTECH 2014), Hawaii, USA}, event_place = {Hawaii, USA}, event_name = {9th ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation and Characterization (WiNTECH 2014)}, event_date = {7 September 2014}, language = {en}, ISBN = {978-1-4503-3072-5}, DOI = {10.1145/2643230.2643236}, reviewed = {1}, author = {Aktas, Ismet and Pu{\~n}al, Oscar and Schmidt, Florian and Dr{\"u}ner, Tobias and Wehrle, Klaus} } @Inproceedings { 2014-chants-wirtz-disco, title = {Opportunistic Interaction in the Challenged Internet of Things}, year = {2014}, month = {9}, day = {7}, pages = {1-8}, url = {fileadmin/papers/2014/2014-wirtz-chants-challenged_iot.pdf}, misc2 = {online}, publisher = {ACM}, booktitle = {Proceedings of the 9th ACM MobiCom Workshop on Challenged Networks (CHANTS 2014), Maui, USA}, event_place = {Maui, Hawaii, USA}, event_name = {Proceedings of the 9th ACM MobiCom Workshop on Challenged Networks (CHANTS 2014)}, event_date = {7 September 2014}, language = {en}, ISBN = {978-1-4503-3071-8}, DOI = {10.1145/2645672.2645679}, reviewed = {1}, author = {Wirtz, Hanno and R{\"u}th, Jan and Serror, Martin and Bitsch Link, J{\'o} Agila and Wehrle, Klaus} } @Inproceedings { 2014-stoffers-omnet-parallel-inet, title = {Enabling Distributed Simulation of OMNeT++ INET Models}, year = {2014}, month = {9}, day = {3}, url = {http://arxiv.org/pdf/1409.0994}, misc = {arXiv:1409.0994}, misc2 = {Online}, publisher = {Cornell University}, address = {Ithaca, New York, United States}, booktitle = {Proceedings of the 1st OMNeT++ Community Summit, Hamburg, Germany}, event_place = {Hamburg, Germany}, language = {en}, author = {Stoffers, Mirko and Bettermann, Ralf and Gross, James and Wehrle, Klaus} } @Inproceedings { 2014-ficloud-henze-upecsi, title = {User-driven Privacy Enforcement for Cloud-based Services in the Internet of Things}, year = {2014}, month = {8}, day = {27}, pages = {191-196}, tags = {ipacs}, url = {/fileadmin/papers/2014/2014-ficloud-henze-upecsi.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {2014 International Conference on Future Internet of Things and Cloud (FiCloud 2014), Barcelona, Spain}, event_place = {Barcelona, Spain}, event_name = {2014 International Conference on Future Internet of Things and Cloud (FiCloud 2014)}, language = {en}, ISBN = {978-1-4799-4357-9}, DOI = {10.1109/FiCloud.2014.38}, reviewed = {1}, author = {Henze, Martin and Hermerschmidt, Lars and Kerpen, Daniel and H{\"a}u{\ss}ling, Roger and Rumpe, Bernhard and Wehrle, Klaus} } @Inproceedings { 2014-bitsch-extremecom-demo, title = {Demo: Opportunistic Mobile Brain Research}, year = {2014}, month = {8}, day = {14}, pages = {1--2}, abstract = {The majority of research using brain imaging and EEG techniques is currently limited to clinical environments, restricting experiments to synthetic tasks in controlled conditions. Lifting these limitations brought about by this artificial set-up would allow us to perform neuropsychological assessments and research in mobile settings or at locations easier accessible to patients, possibly even in remote, hard to access areas. We developed a tablet based mobile framework to present auditory and visual stimuli, capture wireless commercial EEG and screen interaction data, and analyze the recorded data for immediate evaluation, as well as share the data over internet or local opportunistic links. To demonstrate the feasibility of our approach, we successfully replicated the experimental set-up and evaluation pipeline of two existing EEG studies on event-related potentials. This work therefore lays the foundation to further truly mobile brain research and health-care applications.}, url = {fileadmin/papers/2014/2014-bitsch-extremcom-mobile-eeg-demo.pdf}, misc = {Online}, editor = {Hui, Pan and Lindgren, Anders}, publisher = {ACM}, booktitle = {Proceedings of the 6th Extreme Conference on Communication}, event_place = {Galapagos Islands, Ecuador}, event_name = {6th Extreme Conference on Communication}, event_date = {August 11-15, 2014}, language = {en}, ISBN = {978-1-4503-2929-3}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Ramos, Roann and Orlea, David and Wehrle, Klaus} } @Inproceedings { 2014-bitsch-extremecom-liquid-democracy, title = {WIP: Opportunistic Vote Delegation for e-Voting based on Liquid Democracy}, year = {2014}, month = {8}, day = {14}, pages = {1--4}, note = {Work in Progress Paper}, url = {fileadmin/papers/2014/2014-bitsch-extremecom-liquid-democracy.pdf}, misc = {Online}, editor = {Hui, Pan and Lindgren, Anders}, publisher = {ACM}, booktitle = {Proceedings of the 6th Extreme Conference on Communication}, event_place = {Galapagos Islands, Ecuador}, event_name = {6th Extreme Conference on Communication}, event_date = {August 11-15, 2014}, language = {en}, ISBN = {978-1-4503-2929-3}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Tchorbadjiiski, Angel and Wehrle, Klaus} } @Poster { 2014-wisec-ziegeldorf-ipin, title = {POSTER: Privacy-preserving Indoor Localization}, year = {2014}, month = {7}, day = {23}, tags = {rfc}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2014/2014-ziegeldorf-poster-wisec.pdf}, organization = {7th ACM Conference on Security and Privacy in Wireless and Mobile Networks (WiSec '14) (Poster)}, language = {en}, DOI = {10.13140/2.1.2847.4886}, reviewed = {1}, author = {Ziegeldorf, Jan Henrik and Viol, Nicolai and Henze, Martin and Wehrle, Klaus} } @Inproceedings { 2014-hummen-delegation, title = {Delegation-based Authentication and Authorization for the IP-based Internet of Things}, year = {2014}, month = {6}, day = {30}, pages = {284-292}, tags = {iotsec; sensorcloud}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2014/2014-hummen-secon-delegation.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {11th IEEE International Conference on Sensing, Communication, and Networking (SECON 2014)}, event_place = {Singapore}, event_name = {11th IEEE International Conference on Sensor, Communication, and Networking (SECON 2014)}, event_date = {30.06. - 03.07.2014}, language = {en}, DOI = {10.1109/SAHCN.2014.6990364}, reviewed = {1}, author = {Hummen, Ren{\'e} and Shafagh, Hossein and Raza, Shahid and Voigt, Thiemo and Wehrle, Klaus} } @Inproceedings { 2014-schmidt-piccett, title = {Piccett: Protocol-Independent Classification of Corrupted Error-Tolerant Traffic}, year = {2014}, month = {6}, day = {24}, tags = {refector}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2014/2014-schmidt-iscc-piccett.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 18th IEEE Symposium on Computers and Communications (ISCC), Madeira, Portugal}, language = {en}, DOI = {10.1109/ISCC.2014.6912582}, reviewed = {1}, author = {Schmidt, Florian and Henze, Martin and Wehrle, Klaus} } @Inproceedings { 2014-wowmom-wirtz-sofi, title = {Pervasive Content-centric Wireless Networking}, year = {2014}, month = {6}, day = {18}, url = {fileadmin/papers/2014/2014-wirtz-wowmom-sofi.pdf}, misc = {online}, publisher = {IEEE}, booktitle = {15th IEEE International Symposium on a World of Wireless Mobile and Multimedia Networks (WoWMoM'14), Sydney, Australia}, event_place = {Sydney, Australia}, event_name = {WoWMoM}, event_date = {June, 2014}, language = {en}, DOI = {10.1109/WoWMoM.2014.6918968}, reviewed = {1}, author = {Wirtz, Hanno and Ceriotti, Matteo and Grap, Benjamin and Wehrle, Klaus} } @Inproceedings { 2014-wowmom-wirtz-cafi, title = {CA-Fi: Ubiquitous Mobile Wireless Networking without 802.11 Overhead and Restrictions}, year = {2014}, month = {6}, day = {17}, url = {fileadmin/papers/2014/2014-wirtz-wowmom-cafi.pdf}, misc = {online}, publisher = {IEEE}, booktitle = {15th IEEE International Symposium on a World of Wireless Mobile and Multimedia Networks (WoWMoM'14), Sydney, Australia}, language = {en}, DOI = {10.1109/WoWMoM.2014.6918950}, reviewed = {1}, author = {Wirtz, Hanno and Zimmermann, Torsten and Ceriotti, Matteo and Wehrle, Klaus} } @Inproceedings { 2014-aktas-punal-wowmom-machine-learning-based-jamming-detection-for-80211-conference, title = {Machine Learning-based Jamming Detection for IEEE 802.11: Design and Experimental Evaluation}, journal = {Proceedings of the 15th International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM'14), Sydney, Australia}, year = {2014}, month = {6}, day = {16}, pages = {1--10}, tags = {crawler}, url = {fileadmin/papers/2014/2014-aktas-wowmom-jammingdetection.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 15th International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM'14), Sydney, Australia}, event_place = {Sydney}, event_name = {15th International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM'14)}, event_date = {16-19 June, 2014}, language = {en}, reviewed = {1}, author = {Pu{\~n}al, Oscar and Aktas, Ismet and Schnelke, Caj-Julian and Abidin, Gloria and Gross, James and Wehrle, Klaus} } @Inproceedings { 2014-mobisys-rueth-uiso, title = {Demo: Ubiquitous Interaction with Smart Objects}, year = {2014}, month = {6}, pages = {355-356}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2014/2014-rueth-mobisys-uiso.pdf}, web_url = {http://www.comsys.rwth-aachen.de/short/mobisys14-demo}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 12th Annual International Conference on Mobile Systems, Applications, and Services (MobiSys '14), Bretton Woods, New Hampshire, USA}, event_place = {Bretton Woods}, event_name = {12th Annual International Conference on Mobile Systems, Applications, and Services}, event_date = {16-19 June 2014}, language = {en}, ISBN = {978-1-4503-2793-0}, DOI = {10.1145/2594368.2601477}, reviewed = {1}, author = {R{\"u}th, Jan and Wirtz, Hanno and Wehrle, Klaus} } @Inproceedings { 2014-smartcity-zimmermann-pubtrans, title = {Analyzing Metropolitan-area Networking within Public Transportation Systems for Smart City Applications}, year = {2014}, month = {3}, day = {30}, url = {fileadmin/papers/2014/2014-zimmermann-smartcity-pubtrans.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 1st International IEEE Workshop on Architectures and Technologies for Smart Cities (SmartCitiy'14), Dubai, UAE}, event_place = {Dubai, UAE}, event_name = {1st International IEEE Workshop on Architectures and Technologies for Smart Cities (SmartCitiy'14)}, event_date = {30 March - 2 April 2014}, language = {en}, DOI = {10.1109/NTMS.2014.6814007}, reviewed = {1}, author = {Zimmermann, Torsten and Wirtz, Hanno and Pu{\~n}al, Oscar and Wehrle, Klaus} } @Inproceedings { 2014-stoffers-simutools-distributed-horizon, title = {Large-Scale Network Simulation: Leveraging the Strengths of Modern SMP-based Compute Clusters}, year = {2014}, month = {3}, day = {17}, pages = {31-40}, tags = {horizon}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2014/2014-stoffers-simutools-distributed-horizon.pdf}, misc2 = {Online}, publisher = {ICST}, address = {Brussels, Belgium}, booktitle = {Proceedings of the 7th International ICST Conference on Simulation Tools and Techniques (SIMUTools'14), Lisbon, Portugal}, event_place = {Lisbon, Portugal}, language = {en}, ISBN = {978-1-63190-007-5}, DOI = {10.4108/icst.simutools.2014.254622}, reviewed = {1}, author = {Stoffers, Mirko and Schmerling, Sascha and Kunz, Georg and Gross, James and Wehrle, Klaus} } @Inproceedings { 2014-mmsys-wirtz-ubifi, title = {A Wireless Application Overlay for Ubiquitous Mobile Multimedia Sensing and Interaction}, year = {2014}, month = {3}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2014/2014-wirtz-mmsys-ubifi.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 5th ACM Multimedia Systems Conference (MMSys 2014), Special Session on Mobile Multimedia Sensing, Singapore}, event_place = {Singapore}, event_name = {5th ACM Multimedia Systems Conference}, event_date = {19-21 March 2014}, language = {en}, ISBN = {978-1-4503-2705-3}, DOI = {10.1145/2557642.2578224}, reviewed = {1}, author = {Wirtz, Hanno and R{\"u}th, Jan and Zimmermann, Torsten and Ceriotti, Matteo and Wehrle, Klaus} } @Inproceedings { 2014-comsnets-aktas-graph-based-redundancy-removal, title = {Graph-based Redundancy Removal Approach for Multiple Cross-Layer Interactions}, year = {2014}, month = {1}, day = {7}, pages = {1-8}, tags = {crawler}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2014/2014-aktas-comsnets-redundancy.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 2014 Sixth International Conference on Communication Systems and Networks (COMSNETS), Bangalore, India}, event_place = {Bangalore, India}, event_name = {2014 Sixth International Conference on Communication Systems and Networks (COMSNETS)}, event_date = {7-10 January, 2014}, language = {en}, ISBN = {978-1-4799-3635-9}, DOI = {10.1109/COMSNETS.2014.6734899}, reviewed = {1}, author = {Aktas, Ismet and Henze, Martin and Alizai, Muhammad Hamad and M{\"o}llering, Kevin and Wehrle, Klaus} } @Article { 2014-alizai-pad-jnca, title = {Probabilistic Location-Free Addressing in Wireless Networks}, journal = {Elsevier Journal of Network and Computer Applications (JNCA)}, year = {2014}, state = {unpublished}, language = {en}, reviewed = {1}, author = {Alizai, Muhammad Hamad and Wehrle, Klaus} } @Techreport { 2013-schmidt-rtp-extended, title = {Support for Error Tolerance in the Real-Time Transport Protocol}, year = {2013}, month = {12}, day = {20}, number = {AIB-2013-19}, number2 = {arXiv:1312.5892 [cs.NI]}, pages = {1--24}, tags = {refector}, url = {fileadmin/papers/2013/2013-schmidt-aib-rtp.pdf}, misc2 = {Online}, publisher = {Department of Computer Science, RWTH Aachen}, address = {Ahornstr. 55, 52074 Aachen, Germany}, institution = {Department of Computer Science, RWTH Aachen}, type = {Technical Report}, language = {en}, ISSN = {0935-3232}, author = {Schmidt, Florian and Orlea, David and Wehrle, Klaus} } @Inproceedings { 2013-cloudcom-henze-cloud-data-handling, title = {Towards Data Handling Requirements-aware Cloud Computing (Poster Abstract)}, year = {2013}, month = {12}, day = {2}, pages = {266-269}, tags = {ipacs}, url = {fileadmin/papers/2013/2013-cloudcom-henze-cloud-data-handling.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 2013 IEEE International Conference on Cloud Computing Technology and Science (CloudCom), Bristol, UK}, event_place = {Bristol, UK}, event_name = {2013 IEEE International Conference on Cloud Computing Technology and Science (CloudCom 2013)}, language = {en}, ISBN = {978-0-7695-5095-4}, DOI = {10.1109/CloudCom.2013.145}, reviewed = {1}, author = {Henze, Martin and Gro{\ss}fengels, Marcel and Koprowski, Maik and Wehrle, Klaus} } @Article { 2013-ijghpc-henze-sensorcloud, title = {Maintaining User Control While Storing and Processing Sensor Data in the Cloud}, journal = {International Journal of Grid and High Performance Computing (IJGHPC)}, year = {2013}, month = {12}, volume = {5}, number = {4}, pages = {97-112}, tags = {sensorcloud}, url = {fileadmin/papers/2013/2013-ijghpc-henze-sensorcloud.pdf}, misc2 = {Online}, publisher = {IGI Global}, language = {en}, ISSN = {1938-0259}, DOI = {10.4018/ijghpc.2013100107}, reviewed = {1}, author = {Henze, Martin and Hummen, Ren{\'e} and Matzutt, Roman and Catrein, Daniel and Wehrle, Klaus} } @Inproceedings { 2013-hummen-standards, title = {Standards-based End-to-End IP Security for the Internet of Things}, year = {2013}, month = {10}, day = {7}, pages = {1-3}, tags = {iotsec}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2013/2013-hummen-standards.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {21st IEEE International Conference on Network Protocols (ICNP 2013 PhD Forum), G{\"o}ttingen, Germany}, event_place = {G{\"o}ttingen, Germany}, event_name = {PhD Forum of 21st IEEE International Conference on Network Protocols (ICNP 2013 PhD Forum)}, event_date = {7 Oct. 2013}, language = {en}, ISBN = {978-1-4799-1270-4}, DOI = {10.1109/ICNP.2013.6733648}, reviewed = {1}, author = {Hummen, Ren{\'e} and Wehrle, Klaus} } @Inproceedings { 2013-hummen-slimfit, title = {Slimfit - A HIP DEX Compression Layer for the IP-based Internet of Things}, year = {2013}, month = {10}, day = {7}, pages = {259-266}, tags = {iotsec}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2013/2013-hummen-slimfit.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Wireless and Mobile Computing, Networking and Communications (WiMob), 2013 IEEE 9th International Conference on}, event_place = {Lyon, France}, event_name = {IEEE WiMob 2013 Workshop on the Internet of Things Communications and Technologies (IoT 2013)}, language = {en}, ISBN = {978-1-4577-2014-7}, ISSN = {2160-4886}, DOI = {10.1109/WiMOB.2013.6673370}, reviewed = {1}, author = {Hummen, Ren{\'e} and Hiller, Jens and Henze, Martin and Wehrle, Klaus} } @Inproceedings { 2013-icnp-hummen-tailoring, title = {Tailoring End-to-End IP Security Protocols to the Internet of Things}, year = {2013}, month = {10}, day = {7}, pages = {1-10}, tags = {iotsec}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2013/2013-hummen-tailoring.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {In Proceedings of the 21st IEEE International Conference on Network Protocols (ICNP 2013), G{\"o}ttingen, Germany}, event_place = {G{\"o}ttingen, Germany}, event_name = {21st IEEE International Conference on Network Protocols (ICNP 2013)}, event_date = {7-10 Oct. 2013}, language = {en}, ISBN = {978-1-4799-1270-4}, DOI = {10.1109/ICNP.2013.6733571}, reviewed = {1}, author = {Hummen, Ren{\'e} and Wirtz, Hanno and Ziegeldorf, Jan Henrik and Hiller, Jens and Wehrle, Klaus} } @Article { 2013-elsevir-aktas-harnessing-cross-layer-design, title = {Harnessing Cross-Layer Design}, journal = {Elsevir Ad-hoc Networks}, year = {2013}, month = {10}, day = {1}, tags = {crawler}, reviewed = {1}, author = {Aktas, Ismet and Alizai, Muhammad Hamad and Schmidt, Florian and Wirtz, Hanno and Wehrle, Klaus} } @Inproceedings { 2013-wintech-schmidt-senserr, title = {Bit Error Distribution and Mutation Patterns of Corrupted Packets in Low-Power Wireless Networks}, year = {2013}, month = {9}, day = {30}, pages = {49--56}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2013/2013-schmidt-wintech-errors.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 8th ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation and Characterization (WiNTECH 2013), Miami, USA}, event_place = {Miami, USA}, event_name = {8th ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation and Characterization (WiNTECH 2013)}, event_date = {30 September 2013}, language = {en}, DOI = {10.1145/2505469.2505475}, reviewed = {1}, author = {Schmidt, Florian and Ceriotti, Matteo and Wehrle, Klaus} } @Inproceedings { 2013-chants-wirtz-heaven, title = {Interest-based Cloud-facilitated Opportunistic Networking}, year = {2013}, month = {9}, day = {30}, pages = {1--8}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2013/2013-CHANTS-heaven-wirtz.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 8th ACM MobiCom Workshop on Challenged Networks (CHANTS 2013), Miami, USA}, event_place = {Miami, USA}, event_name = {Proceedings of the 8th ACM MobiCom Workshop on Challenged Networks (CHANTS 2013)}, event_date = {30 September 2013}, language = {en}, ISBN = {978-1-4503-2363-5}, DOI = {10.1145/2505494.2505504}, reviewed = {1}, author = {Wirtz, Hanno and R{\"u}th, Jan and Zimmermann, Torsten and Wehrle, Klaus} } @Inproceedings { 2013-wintech-bosling-models, title = {Fingerprinting Channel Dynamics in Indoor Low-Power Wireless Networks}, year = {2013}, month = {9}, day = {30}, pages = {65--72}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2013/2013-bosling-wintech-fingerprint.pdf}, misc2 = {Online}, publisher = {ACM}, booktitle = {Proceedings of the 8th ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation and Characterization (WiNTECH 2013), Miami, USA}, event_place = {Miami, USA}, event_name = {8th ACM International Workshop on Wireless Network Testbeds, Experimental Evaluation and Characterization (WiNTECH 2013)}, event_date = {30 September 2013}, language = {en}, DOI = {10.1145/2505469.2505477}, reviewed = {1}, author = {Bosling, Marcel and Ceriotti, Matteo and Zimmermann, Torsten and Bitsch Link, J{\'o} Agila and Wehrle, Klaus} } @Techreport { 2013-ceriotti-fgsn-appcentric, title = {Towards Application-Centric Deployment of Low-Power Wireless Networks}, year = {2013}, month = {9}, day = {13}, number = {SEEMOO-TR-2013-0}, number2 = {12. GI/ITG KuVS Fachgespr{\"a}ch ''Drahtlose Sensornetze''}, institution = {TU Cottbus}, type = {Technical Report}, author = {Ceriotti, Matteo and Krylovskiy, Alexandr and Wehrle, Klaus} } @Inproceedings { 2013-smith-extremecom-demo, title = {Demo: Opportunistic Deployment Support for Wireless Sensor Networks}, year = {2013}, month = {8}, day = {24}, pages = {1--2}, note = {won ''coolest demo award''}, url = {fileadmin/papers/2013/2013-smith-extremecom-opportunistic-deployment-support.pdf}, misc = {Online}, editor = {Hui, Pan and Lindgren, Anders}, publisher = {ACM}, booktitle = {Proceedings of the 5th Extreme Conference on Communication}, event_place = {Thorsmork, Iceland}, event_name = {5th Extreme Conference on Communication}, event_date = {August 24-30, 2013}, language = {en}, ISBN = {978-1-4503-2171-6}, reviewed = {1}, author = {Smith, Paul and Bitsch Link, J{\'o} Agila and Wehrle, Klaus} } @Inproceedings { 2013-bitsch-extremecom-oneway, title = {A Global One-Way Control Channel for Opportunistic Networks}, year = {2013}, month = {8}, day = {24}, pages = {1--6}, url = {fileadmin/papers/2013/2013-bitsch-extremecom-oneway.pdf}, misc2 = {Online}, editor = {Hui, Pan and Lindgren, Anders}, publisher = {ACM}, booktitle = {Proceedings of the 5th Extreme Conference on Communication}, event_place = {Thorsmork, Iceland}, event_name = {5th Extreme Conference on Communication}, event_date = {August 24-30, 2013}, language = {en}, ISBN = {978-1-4503-2171-6}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Alhamoud, Alaa and Wehrle, Klaus} } @Inproceedings { 2013-wirtz-iot-nc-loops, title = {Opening the Loops - Towards Semantic, Information-centric Networking in the Internet of Things}, year = {2013}, month = {6}, day = {24}, url = {/fileadmin/papers/2013/2013-wirtz-control_loops.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the IEEE International Workshop on Internet-of-Things Networking and Control 2013 (IoT-NC'13)}, event_place = {New Orleans, USA}, event_name = {IEEE International Workshop on Internet-of-Things Networking and Control 2013 (in conjunction with IEEE SECON'13)}, event_date = {2013-06-24}, language = {en}, ISBN = {978-1-4673-3122-7}, DOI = {10.1109/SAHCN.2013.6644955}, reviewed = {1}, author = {Wirtz, Hanno and Wehrle, Klaus} } @Article { 2013-scn-ziegeldorf-iot-privacy, title = {Privacy in the Internet of Things: Threats and Challenges}, journal = {Security and Communication Networks - Special Issue on 'Security in a Completely Interconnected World'}, year = {2013}, month = {6}, day = {10}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2013/2013-ziegeldorf-scn-privacy-in-the-iot.pdf}, misc2 = {Online}, publisher = {Wiley}, language = {en}, DOI = {10.1002/sec.795}, reviewed = {1}, author = {Ziegeldorf, Jan Henrik and Garcia-Morchon, Oscar and Wehrle, Klaus} } @Inproceedings { 2013-sec-routing-switching-maki, title = {A Blueprint for Switching Between Secure Routing Protocols in Wireless Multihop Networks}, year = {2013}, month = {6}, day = {4}, booktitle = {Proceedings of the 4th IEEE International Workshop on Data Security and Privacy in Wireless Networks (D-SPAN 2013)}, state = {accepted}, reviewed = {1}, author = {Werner, Marc and Kaiser, J{\"o}rg and Hollick, Matthias and Weingaertner, Elias and Wehrle, Klaus} } @Inproceedings { 2013-duma-henze-cloud-annotations, title = {The Cloud Needs Cross-Layer Data Handling Annotations (Position Paper)}, year = {2013}, month = {5}, day = {23}, pages = {18-22}, tags = {sensorcloud}, url = {fileadmin/papers/2013/2013-duma-henze-cloudannotations.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 4th International Workshop on Data Usage Management (DUMA 2013), part of 2013 IEEE Security and Privacy Workshops (SPW), San Francisco, CA, USA}, language = {en}, ISBN = {978-1-4799-0458-7}, DOI = {10.1109/SPW.2013.31}, reviewed = {1}, author = {Henze, Martin and Hummen, Ren{\'e} and Wehrle, Klaus} } @Inproceedings { 2013-hummen-towards, title = {Towards Viable Certificate-based Authentication for the Web of Things}, year = {2013}, month = {4}, day = {19}, tags = {iotsec}, url = {fileadmin/papers/2013/2013-hummen-towards.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 2nd ACM Workshop on Hot Topics on Wireless Network Security and Privacy (HotWiSec '13)}, event_place = {Budapest, Hungary}, event_name = {2nd ACM Workshop on Hot Topics on Wireless Network Security and Privacy}, language = {en}, ISBN = {978-1-4503-2003-0}, DOI = {10.1145/2463183.2463193}, reviewed = {1}, author = {Hummen, Ren{\'e} and Ziegeldorf, Jan Henrik and Shafagh, Hossein and Raza, Shahid and Wehrle, Klaus} } @Inproceedings { 2013-hummen-6lowpan, title = {6LoWPAN Fragmentation Attacks and Mitigation Mechanisms}, year = {2013}, month = {4}, day = {17}, tags = {iotsec; sensorcloud}, url = {fileadmin/papers/2013/2013-hummen-6lowpan.pdf}, publisher = {ACM}, booktitle = {Proceedings of the 6th ACM Conference on Security and Privacy in Wireless and Mobile Networks (WiSec '13)}, event_place = {Budapest, Hungary}, event_name = {6th ACM Conference on Security and Privacy in Wireless and Mobile Networks (WiSec '13)}, language = {en}, ISBN = {978-1-4503-1998-0}, DOI = {10.1145/2462096.2462107}, reviewed = {1}, author = {Hummen, Ren{\'e} and Hiller, Jens and Wirtz, Hanno and Henze, Martin and Shafagh, Hossein and Wehrle, Klaus} } @Poster { 2013-fkie-aktas-poster-cross-layer-koordination-jamming, title = {Cross-Layer-Koordination zur Erkennung und Behandlung von Jamming-Angriffen (Poster)}, year = {2013}, month = {4}, note = {F\&T Tag, Wachtenberg}, tags = {crawler}, publisher = {Fraunhofer Institute FKIE}, organization = {F\&T Tag}, extern = {1}, author = {Aktas, Ismet and Wehrle, Klaus} } @Inproceedings { 2013-schmidt-wons-rtp, title = {A Heuristic Header Error Recovery Scheme for RTP}, year = {2013}, month = {3}, day = {19}, pages = {186--190}, tags = {refector}, url = {fileadmin/papers/2013/2013-schmidt-wons-rtp-refector.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 10th International Conference on Wireless On-demand Network Systems and Services (WONS'13), Banff, Canada}, event_place = {Banff, Canada}, event_name = {10th International Conference on Wireless On-demand Network Systems and Services (WONS'13)}, event_date = {17-20 March 2013}, language = {en}, ISBN = {978-1-4799-0747-2}, DOI = {10.1109/WONS.2013.6578345}, reviewed = {1}, author = {Schmidt, Florian and Orlea, David and Wehrle, Klaus} } @Article { 2013-fernandez-ceriotti-bitsch-and-then-the-weekend-jsan, title = {“And Then, the Weekend Started”: Story of a WSN Deployment on a Construction Site}, journal = {Journal of Sensor and Actuator Networks}, year = {2013}, month = {3}, day = {11}, volume = {2}, number = {1}, pages = {156--171}, abstract = {Wireless Sensor Networks (WSNs) are versatile monitoring systems that can provide a large amount of real-time data in scenarios where wired infrastructures are inapplicable or expensive. This technology is expected to be handled by domain experts, who perceive a WSN as a (promised to be) easy to deploy black box. This work presents the deployment experience of a WSN, as conducted by domain experts, in a ground improvement area. Building upon off-the-shelf solutions, a fuel cell powered gateway and 21 sensor devices measuring acceleration, inclination, temperature and barometric pressure were installed to monitor ground subsidence. We report about how poor GSM service, malfunctioning hardware, unknown communication patterns and obscure proprietary software required in-field ad-hoc solutions. Through the lessons learned, we look forward to investigating how to make the deployment of these systems an easier task.}, keywords = {sensor network deployment; experiences; in-field debugging}, web_url = {http://www.mdpi.com/2224-2708/2/1/156}, misc2 = {Online}, language = {en}, ISSN = {2224-2708}, DOI = {10.3390/jsan2010156}, reviewed = {1}, author = {Fern{\'a}ndez-Steeger, Tom{\'a}s and Ceriotti, Matteo and Bitsch Link, J{\'o} Agila and May, Matthias and Hentschel, Klaus and Wehrle, Klaus} } @Inproceedings { 2013-wons-wirtz-fuzzy, title = {Fuzzy Logical Coordinates and Location Services for Scalable Addressing in Wireless Networks}, year = {2013}, month = {3}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 10th International Conference on Wireless On-demand Network Systems and Services (WONS '13), Banff, Canada}, event_place = {Banff, Canada}, language = {en}, ISBN = {978-1-4799-0747-2}, DOI = {10.1109/WONS.2013.6578338}, reviewed = {1}, author = {Wirtz, Hanno and Alizai, Muhammad Hamad and Wehrle, Klaus} } @Inproceedings { 2013-ccnc-lora-gossipmule, title = {Gossipmule: Improving Association Decisions via Opportunistic Recommendations}, year = {2013}, month = {1}, day = {11}, booktitle = {Proceedings of the 1st Workshop on People Centric Sensing and Communications}, state = {accepted}, reviewed = {1}, author = {Lora Gir{\'o}n, M{\'o}nica Alejandra and Paulus, Alexander and Wehrle, Klaus} } @Inproceedings { 2013-ccncdemo-lora-gossipmule, title = {Demo: Improving Associations in IEEE 802.11 WLANs}, year = {2013}, month = {1}, booktitle = {Proceedings of the 10th IEEE Consumer Communications \& Networking Conference, CCNC}, event_place = {Las Vegas, Nevada, USA}, event_name = {CCNC 2013 Demonstration Track}, state = {accepted}, author = {Lora Gir{\'o}n, M{\'o}nica Alejandra and Paulus, Alexander and Wehrle, Klaus} } @Article { 2013-wirtz-alizai-tinywifi-jnca, title = {Portable Wireless-Networking Protocol Evaluation}, journal = {Journal of Network and Computer Applications (JNCA)}, year = {2013}, note = {Co-primary authorship Alizai, Wirtz fileadmin/papers/2013/2013-wirtz-alizai-tinywifi-jnca.pdf}, web_url = {http://www.sciencedirect.com/science/article/pii/S108480451300060X}, language = {en}, ISSN = {1084-8045}, DOI = {10.1016/j.jnca.2013.02.022}, reviewed = {1}, author = {Wirtz, Hanno and Alizai, Muhammad Hamad and Kirchen, Bernhard and Wehrle, Klaus} } @Inproceedings { 2012-hummen-cloud, title = {A Cloud Design for User-controlled Storage and Processing of Sensor Data}, year = {2012}, month = {12}, day = {3}, pages = {232-240}, tags = {sensorcloud}, url = {fileadmin/papers/2012/2012-hummen-cloud.pdf}, publisher = {IEEE}, booktitle = {Proceedings of the 2012 IEEE 4th International Conference on Cloud Computing Technology and Science (CloudCom), Taipei, Taiwan}, event_place = {Taipei, Taiwan}, event_name = {Fourth IEEE International Conference on Cloud Computing Technology and Science}, language = {en}, ISBN = {978-1-4673-4511-8}, DOI = {10.1109/CloudCom.2012.6427523}, reviewed = {1}, author = {Hummen, Ren{\'e} and Henze, Martin and Catrein, Daniel and Wehrle, Klaus} } @Inproceedings { 2012-IPIN-Peter-Versatile-Maps, title = {Versatile Geo-referenced Maps for Indoor Navigation of Pedestrians}, year = {2012}, month = {11}, day = {13}, pages = {1--4}, url = {fileadmin/papers/2012/2012-bitsch-IPIN-vegemite.pdf}, web_url2 = {http://www.surveying.unsw.edu.au/ipin2012/proceedings/session.php?code=6C\&name=SLAM}, misc2 = {Online}, editor = {Li, Binghao Li and Gallagher, Thomas}, publisher = {School of Surveying and Geospatial Engineering, University of New South Wales, Sydney, Australia}, booktitle = {Proceedings of the 2012 International Conference on Indoor Positioning and Indoor Navigation (IPIN), Sydney, Australia}, event_place = {Sydney, Australia}, event_name = {2012 International Conference on Indoor Positioning and Indoor Navigation}, event_date = {November 13--15, 2012}, language = {en}, ISBN = {978-0-646-57851-4}, reviewed = {1}, author = {Peter, Michael and Fritsch, Dieter and Sch{\"a}fer, Bernhardt and Kleusberg, Alfred and Bitsch Link, J{\'o} Agila and Wehrle, Klaus} } @Inproceedings { 2012-IPIN-Viol-HMM, title = {Hidden Markov Model-based 3D Path-matching using Raytracing-generated Wi-Fi Models}, year = {2012}, month = {11}, day = {13}, pages = {1--10}, url = {fileadmin/papers/2012/2012-11-viol-ipin.pdf}, web_url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6418873\&tag=1}, misc2 = {Online}, booktitle = {Proceedings of the 2012 International Conference on Indoor Positioning and Indoor Navigation (IPIN), Sydney, Australia}, event_place = {Sydney, Australia}, event_name = {2012 International Conference on Indoor Positioning and Indoor Navigation}, event_date = {November 13--15, 2012}, language = {en}, ISBN = {978-1-4673-1955-3}, DOI = {10.1109/IPIN.2012.6418873}, reviewed = {1}, author = {Viol, Nicolai and Bitsch Link, J{\'o} Agila and Wirtz, Hanno and Rothe, Dirk and Wehrle, Klaus} } @Inproceedings { 2012-IPIN-Bitsch-FlowPath, title = {Indoor Navigation on Wheels (and on Foot) using Smartphones}, year = {2012}, month = {11}, day = {13}, pages = {10 S.}, url = {fileadmin/papers/2012/2012-bitsch-IPIN-navigation-on-wheels.pdf}, web_url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=\&arnumber=6418931}, misc2 = {Print}, address = {Piscataway, NJ, USA}, booktitle = {Proceedings of the 2012 International Conference on Indoor Positioning and Indoor Navigation (IPIN), 11-13 November 2012 Sydney, Australia}, organization = {IEEE}, event_place = {Sydney, Australia}, event_name = {2012 International Conference on Indoor Positioning and Indoor Navigation}, event_date = {November 13--15, 2012}, language = {en}, ISBN = {978-1-4673-1955-3}, DOI = {10.1109/IPIN.2012.6418931}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Gerdsmeier, Felix and Smith, Paul and Wehrle, Klaus} } @Inproceedings { 2012-mass-wirtz-dlsd, title = {DHT-based Localized Service Discovery in Wireless Mesh Networks}, year = {2012}, month = {10}, pages = {10 S.}, url = {fileadmin/papers/2012/2012-mass-wirtz-dlsd.pdf}, misc2 = {Online}, publisher = {IEEE Computer Society}, address = {Washington, DC, USA}, booktitle = {Proceedings of The Ninth IEEE International Conference on Mobile Ad-hoc and Sensor Systems (IEEE MASS 2012), October 8-11 2012, Las Vegas, NV, USA}, event_place = {Las Vegas, USA}, event_name = {Ninth IEEE International Conference on Mobile Ad-hoc and Sensor Systems (IEEE MASS 2012)}, event_date = {8-11 October 2012}, language = {en}, ISBN = {978-1-4673-2433-5}, DOI = {10.1109/MASS.2012.6502498}, reviewed = {1}, author = {Wirtz, Hanno and Heer, Tobias and Serror, Martin and Wehrle, Klaus} } @Inproceedings { 2012-wripe-sasnauskas-symnet, title = {Integration Testing of Protocol Implementations using Symbolic Distributed Execution}, year = {2012}, month = {10}, pages = {6 S.}, tags = {kleenet}, url = {fileadmin/papers/2012/2012-09-wripe-sasnauskas-SymNet.pdf}, misc2 = {Print Online}, address = {Piscataway, NJ, USA}, booktitle = {The 2nd International Workshop on Rigorous Protocol Engineering (WRiPE 2012), 30 October - 02 November 2012, Austin, TX, USA}, organization = {IEEE}, event_place = {Austin, TX, USA}, event_name = {The 2nd International Workshop on Rigorous Protocol Engineering (WRiPE 2012)}, event_date = {October 30 - November 02 2012}, language = {en}, ISBN = {978-1-4673-2445-8}, DOI = {10.1109/ICNP.2012.6459940}, reviewed = {1}, author = {Sasnauskas, Raimondas and Kaiser, Philipp and Jukić, Russ Lucas and Wehrle, Klaus} } @Techreport { 2012-weingaertner-fgsn-sim-iot, title = {How to simulate the Internet of Things?}, year = {2012}, month = {9}, day = {26}, number = {SEEMOO-TR-2012-0}, booktitle = {11. GI/ITG KuVS Fachgespr{\"a}ch ''Drahtlose Sensornetze''}, institution = {TU Darmstadt}, type = {Sammelband der Beitr{\"a}ge zum 11. GI/ITG KuVS Fachgespr{\"a}ch ''Drahtlose Sensornetze'' (Technical Report)}, author = {Weingaertner, Elias and Ceriotti, Matteo and Wehrle, Klaus} } @Inproceedings { 2012-pimrc-schmidt-ofra, title = {A Receiver-Based 802.11 Rate Adaptation Scheme with On-Demand Feedback}, year = {2012}, month = {9}, day = {10}, pages = {1--7}, abstract = {Classical 802.11 rate adaptation algorithms rely on feedback from the receiver to correctly choose a sending rate, typically in the form of acknowledgments (ACKs). In the absence of such frames, novel techniques are required for rate selection. We present OFRA, a receiver-based rate adaptation algorithm that works with ACK-less traffic. Feedback information is sent on-demand using a control frame to explicitly inform the transmitter about which bit rate to use on subsequent data frames. This approach guarantees standard conformity and exhibits fast and accurate bit rate adaptation at the cost of a modest overhead increase. We evaluate the performance of OFRA against various state-of-the-art rate adaptation schemes by means of simulations. If ACK frames are to be transmitted, OFRA performs better than related work in most considered scenarios, and on par in the others. In the absence of ACKs, OFRA provides large goodput gains under good channel conditions and comparable goodput in other situations.}, tags = {OFRA refector}, url = {fileadmin/papers/2012/2012-schmidt-pimrc-ofra.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 23rd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC'12), Sydney, Australia}, event_place = {Sydney, Australia}, event_name = {23rd IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC'12)}, event_date = {9-12 September 2012}, language = {en}, ISBN = {978-1-4673-2566-0}, ISSN = {2166-9570}, DOI = {10.1109/PIMRC.2012.6362818}, reviewed = {1}, author = {Schmidt, Florian and Hithnawi, Anwar and Pu{\~n}al, Oscar and Gross, James and Wehrle, Klaus} } @Inproceedings { 2012-aktas-new2an-AnAdaptiveCodecSwitchingSchemeforSIPbasedVoIP-conference, title = {An Adaptive Codec Switching Scheme for SIP-based VoIP}, journal = {Proceedings of the 12th International Conference on Next Generation Wired/Wireless Networking (NEW2AN 2012)}, year = {2012}, month = {8}, day = {27}, pages = {1-12}, abstract = {Contemporary Voice-Over-IP (VoIP) systems typically ne- gotiate only one codec for the entire VoIP session life time. However, as different codecs perform differently well under certain network conditions like delay, jitter or packet loss, this can lead to a reduction of quality if those conditions change during the call. This paper makes two core contributions: First, we compare the speech quality of a set of stan- dard VoIP codecs given different network conditions. Second, we propose an adaptive end-to-end based codec switching scheme that fully conforms to the SIP standard. Our evaluation with a real-world prototype based on Linphone shows that our codec switching scheme adapts well to changing network conditions, improving overall speech quality.}, tags = {crawler}, url = {fileadmin/papers/2012/2012-aktas-new2an-codecswitching.pdf}, misc2 = {Online}, publisher = {LNCS}, booktitle = {Proceedings of the 12th International Conference on Next Generation Wired/Wireless Networking (NEW2AN 2012), St. Pettersburg, Russia.}, event_place = {St. Pettersburg, Russia}, event_name = {12th International Conference on Next Generation Wired/Wireless Networking (NEW2AN 2012)}, event_date = {27-29 August, 2012}, language = {en}, ISBN = {978-3-642-32685-1}, DOI = {10.1007/978-3-642-32686-8_32}, reviewed = {1}, author = {Aktas, Ismet and Schmidt, Florian and Weingaertner, Elias and Schnelke, Caj-Julian and Wehrle, Klaus} } @Inproceedings { 2012-mobicom-wirtz-sofi, title = {Demo: On-demand Content-centric Wireless Networking}, year = {2012}, month = {8}, pages = {451-454}, misc2 = {Online}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the 18th ACM Annual International Conference on Mobile Computing and Networking (MobiCom'12), Istanbul, Turkey}, event_place = {Istanbul, Turkey}, event_name = {18th ACM Annual International Conference on Mobile Computing and Networking}, event_date = {22-26 August 2012}, language = {en}, ISBN = {978-1-4503-1159-5}, DOI = {10.1145/2348543.2348608}, reviewed = {1}, author = {Wirtz, Hanno and Martin, David and Grap, Benjamin and Wehrle, Klaus} } @Inproceedings { 2012-kunz-pads-gpu, title = {Multi-level Parallelism for Time- and Cost-efficient Parallel Discrete Event Simulation on GPUs}, year = {2012}, month = {7}, day = {20}, pages = {23--32}, tags = {horizon}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2012/2012-kunz-pads-gpu.pdf}, misc2 = {Print}, publisher = {IEEE}, booktitle = {Proceedings of the 26th ACM/IEEE/SCS Workshop on Principles of Advanced and Distributed Simulation (PADS'12), Zhangjiajie, China}, language = {en}, ISBN = {978-0-7695-4714-5}, ISSN = {1087-4097}, DOI = {10.1109/PADS.2012.27}, reviewed = {1}, author = {Kunz, Georg and Schemmel, Daniel and Gross, James and Wehrle, Klaus} } @Article { 2012-JLBS-Bitsch-FootPath, title = {Accurate Map-based Indoor Navigation on the Mobile}, journal = {Journal of Location Based Services}, year = {2012}, month = {7}, day = {11}, volume = {7}, number = {1}, pages = {23-43}, abstract = {We present FootPath, a self-contained, map-based indoor navigation system. Using only the accelerometer and the compass readily available in modern smartphones, we accurately localise a user on her route and provide her with turn-by-turn instructions to her destination. To compensate for inaccuracies in step detection and heading estimation, we match the detected steps onto the expected route using sequence alignment algorithms from the field of bioinformatics. As our solution integrates well with OpenStreetMap, it allows painless and cost-efficient collaborative deployment, without the need for additional infrastructure.}, web_url = {http://www.tandfonline.com/doi/abs/10.1080/17489725.2012.692620}, misc2 = {Online}, publisher = {Taylor \& Francis}, address = {Bristol, PA, USA}, language = {en}, ISSN = {1748-9733}, DOI = {10.1080/17489725.2012.692620}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Smith, Paul and Viol, Nicolai and Wehrle, Klaus} } @Inproceedings { 2012-aktas-wowmom-CRAWLER:AnExperimentationPlatformforSystemMonitoringandCross-Layer-Coordination-conference, title = {CRAWLER: An Experimentation Architecture for System Monitoring and Cross-Layer-Coordination}, journal = {Proceedings of the 13th International Symposium on a World of Wireless, Mobile and MultimediaNetworks (WoWMoM'12), San Francisco, USA}, year = {2012}, month = {6}, day = {25}, pages = {1--9}, tags = {crawler}, url = {fileadmin/papers/2012/2012-aktas-wowmom-crawler.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 13th International Symposium on a World of Wireless, Mobile and MultimediaNetworks (WoWMoM'12), San Francisco, USA}, event_place = {San Francisco}, event_name = {13th International Symposium on a World of Wireless, Mobile and MultimediaNetworks (WoWMoM'12)}, event_date = {25-28 June, 2012}, language = {en}, ISBN = {978-1-4673-1238-7}, DOI = {10.1109/WoWMoM.2012.6263686}, reviewed = {1}, author = {Aktas, Ismet and Schmidt, Florian and Alizai, Muhammad Hamad and Dr{\"u}ner, Tobias and Wehrle, Klaus} } @Inproceedings { 2012-hummen-seams, title = {SEAMS: A Signaling Layer for End-host-Assisted Middlebox Services}, year = {2012}, month = {6}, day = {25}, pages = {525--532}, url = {fileadmin/papers/2012/2012-hummen-seams.pdf}, booktitle = {Proceedings of the 11th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (IEEE TrustCom-12)}, organization = {IEEE}, event_place = {Liverpool, United Kingdom}, language = {en}, ISBN = {978-1-4673-2172-3}, DOI = {10.1109/TrustCom.2012.250}, reviewed = {1}, author = {Hummen, Ren{\'e} and Ziegeldorf, Jan Henrik and Heer, Tobias and Wirtz, Hanno and Wehrle, Klaus} } @Inproceedings { WirtzHHW2012, title = {Mesh-DHT: A Locality-Based Distributed Look-Up Structure for Wireless Mesh Networks}, year = {2012}, month = {6}, day = {14}, pages = {653-658}, url = {fileadmin/papers/2012/2012_wirtz_icc_mesh_dht.pdf}, misc2 = {Print Online}, publisher = {IEEE}, booktitle = {Proceedings of the IEEE International Conference on Communications (ICC 2012), Ottawa, Canada}, event_place = {Ottawa, Canada}, event_name = {ICC 2012}, event_date = {10.-15.06.2012}, language = {en}, ISBN = {978-1-4577-2051-2}, DOI = {10.1109/ICC.2012.6364336}, reviewed = {1}, author = {Wirtz, Hanno and Heer, Tobias and Hummen, Ren{\'e} and Wehrle, Klaus} } @Article { 2012-4-alizai-wild-ijdsn, title = {Exploiting the Burstiness of Intermediate Quality Wireless Links}, journal = {International Journal of Distributed Sensor Networks (IJDSN)}, year = {2012}, month = {4}, day = {2}, tags = {wld}, url = {fileadmin/papers/2012/2012-ijdsn-wld-alizai.pdf}, state = {unpublished}, language = {en}, ISSN = {1550-1329}, reviewed = {1}, author = {Alizai, Muhammad Hamad and Landsiedel, Olaf and Wehrle, Klaus} } @Inproceedings { 2012-taicpart-dustmann-symbolic-time, title = {Position Paper: Symbolic System Time in Distributed Systems Testing}, year = {2012}, month = {4}, abstract = {We propose an extension of symbolic execution of distributed systems to test software parts related to timing. Currently, the execution model is limited to symbolic input for individual nodes, not capturing the important class of timing errors resulting from varying network conditions. In this paper, we introduce symbolic system time in order to systematically find timing-related bugs in distributed systems. Instead of executing time events at a concrete time, we execute them at a set of times and analyse possible event interleavings on demand. We detail on the resulting problem space, discuss possible algorithmic optimisations, and highlight our future research directions.}, tags = {kleenet}, url = {fileadmin/papers/2012/2012-04-taicpart-soriadustmann-symtime.pdf}, booktitle = {TAICPART'2012}, language = {en}, reviewed = {1}, author = {Soria Dustmann, Oscar and Sasnauskas, Raimondas and Wehrle, Klaus} } @Conference { 2012-wns3-weingaertner-glebke-vodsim, title = {Building a modular BitTorrent model for ns-3}, year = {2012}, month = {3}, day = {26}, pages = {373-344}, abstract = {Over the past decade BitTorrent has established itself as the virtual standard for P2P file sharing in the Internet. However, it is currently not possible to investigate BitTorrent with ns-3 due to the unavailability of an according application model. In this paper we eliminate this burden. We present a highly modular BitTorrent model which allows for the easy simulation of different BitTorrent systems such as file sharing as well as present and future BitTorrent-based Video-on-Demand systems.}, note = {Best Paper Award, Best Student Paper Award}, web_url = {http://dl.acm.org/citation.cfm?id=2263019.2263073}, publisher = {ICST}, address = {Brussels, Belgium}, booktitle = {Proceedings of the 2012 workshop on ns-3 (WNS3 2012), 26 March 2012, Desenzano del Garda, Italy}, event_place = {Desenzano del Garda, Italy}, event_name = {Proceedings of the 2012 workshop on ns-3 (WNS3 2012)}, ISBN = {978-1-4503-1510-4}, reviewed = {1}, author = {Weingaertner, Elias and Glebke, Ren{\'e} and Lang, Martin and Wehrle, Klaus} } @Poster { 2012-kunz-omnetpp-sequencechart, title = {Poster Abstract: Extending the OMNeT++ Sequence Chart for Supporting Parallel Simulations in Horizon}, year = {2012}, month = {3}, day = {23}, affiliation = {5th International Workshop on OMNeT++ (OMNeT++'12), Desenzano del Garda, Italy}, tags = {horizon}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2012/2012-kunz-omnetpp-sequencechart.pdf}, misc2 = {Online}, publisher = {ICST}, event_name = {5th International Workshop on OMNeT++ (OMNeT++'12), Desezano del Garda, Italy}, language = {en}, reviewed = {1}, author = {Kunz, Georg and Tenbusch, Simon and Gross, James and Wehrle, Klaus} } @Inproceedings { 2012-kunz-simutools-probabilistic-sync, title = {Know Thy Simulation Model: Analyzing Event Interactions for Probabilistic Synchronization in Parallel Simulations}, year = {2012}, month = {3}, day = {20}, pages = {119-128}, tags = {horizon}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2012/2012-kunz-simutools-prob-synch.pdf}, misc2 = {Online}, publisher = {ICST}, address = {Brussels, Belgium}, booktitle = {Proceedings of the 5th International ICST Conference on Simulation Tools and Techniques (SIMUTools'12), Desenzano del Garda, Italy}, event_place = {Desenzano, Italy}, language = {en}, ISBN = {978-1-4503-1510-4}, DOI = {10.4108/icst.simutools.2012.247716}, reviewed = {1}, author = {Kunz, Georg and Stoffers, Mirko and Gross, James and Wehrle, Klaus} } @Miscellaneous { 2012-hummen-iot-trust, title = {Modeling User-defined Trust Overlays for the IP-based Internet of Things (Position Paper)}, year = {2012}, month = {3}, day = {20}, tags = {iotsec}, url = {fileadmin/papers/2012/2012-hummen-iot-trust.pdf}, misc2 = {Online}, howpublished = {Workshop on Smart Object Security}, language = {en}, reviewed = {1}, author = {Hummen, Ren{\'e} and R{\"o}ller, Christian and Wehrle, Klaus} } @Inproceedings { 2012-aktas-simutools-FANTASY:FullyAutomaticNetworkEmulationArchitecturewithCross-LayerSupport-conference, title = {FANTASY: Fully Automatic Network Emulation Architecture with Cross-Layer Support}, year = {2012}, month = {3}, day = {19}, pages = {57-64}, tags = {crawler, fantasy}, url = {fileadmin/papers/2012/2012-aktas-simutools-fantasy.pdf}, web_url = {http://dl.acm.org/citation.cfm?id=2263019\&CFID=88550183\&CFTOKEN=31687193}, misc2 = {Online}, publisher = {ICST}, address = {Brussels, Belgium}, booktitle = {Proceedings of the 5th ACM International ICST Conference on Simulation Tools and Techniques (SIMUTools '12), Desenzano del Garda, Italy}, event_place = {Desenzano, Italy}, event_name = {5th ACM International ICST Conference on Simulation Tools and Techniques (SIMUTools '12)}, event_date = {19-23 March, 2012}, language = {en}, ISBN = {978-1-4503-1510-4}, DOI = {10.4108/icst.simutools.2012.247759}, reviewed = {1}, author = {Aktas, Ismet and vom Lehn, Hendrik and Habets, Christoph and Schmidt, Florian and Wehrle, Klaus} } @Inproceedings { 2012-lora-mobiopp-Gossipmule:ScanningandDisseminatingInformationBetweenStationsinCooperativeWLANs, title = {Gossipmule: Scanning and Disseminating Information Between Stations in Cooperative WLANs (Poster)}, year = {2012}, month = {3}, day = {15}, pages = {87-88}, abstract = {In Cooperative WLAN scenarios, the lack of a centralized management, the existence of many administrative domains and the current association process in wireless networks make it difficult to guarantee the quality that users expect from services and networks. We present Gossipmule, an agent for wireless nodes that enhances the QoE perceived by users in Cooperative WLANs. Gossipmule uses mobile Crowdsensing between the wireless nodes to collect and disseminate information regarding the network. This information is used by the agent to have a more assertive association when making decisions regarding the user-AP association.}, note = {(Poster)}, url = {/fileadmin/papers/2012/2012-lora-MobiOpp12-Gossipmule.pdf}, web_url = {http://dl.acm.org/citation.cfm?id=2159576\&CFID=88550183\&CFTOKEN=31687193}, misc2 = {Online}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the Workshop on Mobile Opportunistic Networking ACM/SIGMOBILE MobiOpp 2012, Zurich, Switzerland}, event_place = {Zurich, Switzerland}, event_name = {Proceedings of the Workshop on Mobile Opportunistic Networking ACM/SIGMOBILE MobiOpp 2012}, event_date = {2012-03-15}, language = {en}, ISBN = {978-1-4503-1208-0}, DOI = {10.1145/2159576.2159598}, reviewed = {1}, author = {Lora Gir{\'o}n, M{\'o}nica Alejandra and Paulus, Alexander and Bitsch Link, J{\'o} Agila and Wehrle, Klaus} } @Inproceedings { 2012-extremecom-goliath-adama, title = {A Versatile Architecture for DTN Services (Demo)}, year = {2012}, month = {3}, day = {10}, pages = {1--2}, abstract = {In this demo we present our architecture for delivering ap- plication services via Disruption or Delay Tolerant Networks (DTNs). The search for a killer application is still ongoing. Our architecture enables the community to quickly proto- type new services and test them in the real world, outside of simulators. Common tasks such as data transportation through the network is handled by the framework but can still be in uenced by the service, if required. A robust plu- gin architecture allows to deploy new applications and rout- ing schemes without a ecting stable-running services on the same network, even if the source of the new plugin is un- trusted.}, annotation = {Demo Abstract}, web_url = {http://extremecom2012.ee.ethz.ch/papers/7-extremecom2012-Goliath.pdf}, misc2 = {Online}, editor = {Hui, Pan and Lindgren, Anders}, publisher = {ETH Zurich}, address = {Zurich, Switzerland}, booktitle = {Proceedings of the 4th Extreme Conference on Communication}, event_place = {Zurich Switzerland}, event_name = {4th Extreme Conference on Communication}, event_date = {March 10-14, 2012}, language = {en}, reviewed = {1}, author = {Goliath, Andr{\'e} and Bitsch Link, J{\'o} Agila and Wehrle, Klaus} } @Miscellaneous { flowpath-patent-pending, title = {Kamerabasierte Geschwindigkeits- und Richtungs{\"a}nderungsbestimmung bei langsamen Geschwindigkeiten mittels Smartphones (FlowPath)}, year = {2012}, month = {2}, day = {24}, note = {Amtliches Aktenzeichen 10 2012 101 513.9 beim Deutschen Patent- und Markenamt, Anmeldetag: 24.2.2012}, tags = {footpath}, howpublished = {Patent pending}, language = {de}, author = {Bitsch Link, J{\'o} Agila and Smith, Paul and Wehrle, Klaus} } @Inproceedings { 2012-wons-bosling-redmann-weingaertner, title = {Can P2P swarm loading improve the robustness of 6LoWPAN data transfer?}, year = {2012}, month = {1}, day = {9}, pages = {131-134}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2012/2012-students-6lowpan-wons2012.pdf}, web_url = {http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=6138950\#}, misc2 = {Online}, publisher = {IEEE}, address = {Piscataway, NJ, USA}, booktitle = {Proceedings of the 9th International Conference on Wireless On-demand Network Systems and Services (WONS '12), Courmayeur, Italy}, event_place = {Courmayeur, Italy}, language = {en}, ISBN = {978-1-4577-1722-2}, DOI = {10.1109/WONS.2012.6152218}, reviewed = {1}, author = {Bosling, Marcel and Redmann, Torsten and Tekam, Jean and Weingaertner, Elias and Wehrle, Klaus} } @Inproceedings { 2011-wirtz-kaleidoscope, title = {Cooperative Wi-Fi-Sharing: Encouraging Fair Play}, year = {2011}, month = {12}, day = {14}, tags = {mobile_access}, url = {fileadmin/papers/2011/2011-wirtz-kaleidoscope.pdf}, misc = {Online}, address = {ITU}, booktitle = {Proceedings of the ITU-T Kaleidoscope Event 2011, Cape Town, South Africa}, event_place = {Cape Town, South Africa}, event_name = {ITU-T Kaleidoscope: The fully networked human?}, event_date = {2011-12-12}, language = {en}, ISBN = {978-92-61-13651-2}, reviewed = {1}, author = {Wirtz, Hanno and Hummen, Ren{\'e} and Viol, Nicolai and Heer, Tobias and Lora Gir{\'o}n, M{\'o}nica Alejandra and Wehrle, Klaus} } @Inproceedings { 2011-12-conext-schmidt-refector, title = {Refector: Heuristic Header Error Recovery for Error-Tolerant Transmissions}, year = {2011}, month = {12}, day = {6}, pages = {1--12}, tags = {refector}, url = {fileadmin/papers/2011/2011-schmidt-refector-conext.pdf}, misc2 = {Online}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the 7th International Conference on emerging Networking EXperiments and Technologies (CoNEXT), Tokyo, Japan}, event_place = {Tokyo, Japan}, event_name = {7th ACM International Conference on emerging Networking EXperiments and Technologies (CoNEXT)}, event_date = {6-9 December, 2011}, language = {en}, ISBN = {978-1-4503-1041-3}, DOI = {10.1145/2079296.2079318}, reviewed = {1}, author = {Schmidt, Florian and Alizai, Muhammad Hamad and Aktas, Ismet and Wehrle, Klaus} } @Inproceedings { 2011-globecom-bitsch-geodtn, title = {geoDTN: Geographic Routing in Disruption Tolerant Networks}, year = {2011}, month = {12}, day = {5}, pages = {1 -- 5}, abstract = {In this paper we present a disruption tolerant routing algorithm based on geographic location information, which improves upon the hop count compared to the current state of the art by up to a factor of three in large scale human networks. Leveraging only the history of geographic movement patterns in the two-hop neighborhood, our algorithm is able to perform well in the absence of knowledge of social interaction between nodes and without detailed future schedule information. Representing previously visited locations as probability distributions encoded in an efficient vector, we formalize a heuristic for efficiently forwarding messages in disruption tolerant networks, implement a framework for comparing our approach with the state of the art, and evaluate key metrics, such as hop count and delivery rate, as well as energy consumption and battery depletion fairness on real world data. We are able to outperform the state of the art in human mobility based networks considerably in terms of energy usage per node, thereby extending data network availability further into areas devoid of otherwise necessary communication infrastructure.}, url = {fileadmin/papers/2011/2011-GlobeCom-bitsch-geoDTN.pdf}, misc2 = {Online}, address = {Piscataway, NJ, USA}, booktitle = {IEEE GLOBECOM 2011 - Next Generation Networking Symposium (GC'11 - NGN), Houston, Texas, USA}, organization = {IEEE}, event_place = {Houston, Texas, USA}, event_name = {IEEE GLOBECOM 2011 - Next Generation Networking Symposium (GC'11 - NGN)}, event_date = {5-9 December 2011}, language = {en}, ISBN = {978-1-4244-9268-8}, ISSN = {1930-529X}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Schmitz, Daniel and Wehrle, Klaus} } @Article { 2011-heer-iot-journal, title = {Security Challenges in the IP-based Internet of Things}, journal = {Springer Wireless Personal Communications Journal}, year = {2011}, month = {10}, volume = {61}, number = {3}, pages = {527-542}, abstract = {A direct interpretation of the term Internet of Things refers to the use of standard Internet protocols for the human-to-thing or thing-to-thing communication in embedded networks. Although the security needs are well-recognized in this domain, it is still not fully understood how existing IP security protocols and architectures can be deployed. In this paper, we discuss the applicability and limitations of existing Internet protocols and security architectures in the context of the Internet of Things. First, we give an overview of the deployment model and general security needs. We then present challenges and requirements for IP-based security solutions and highlight specific technical limitations of standard IP security protocols.}, tags = {iotsec}, url = {fileadmin/papers/2011/2011-heer-iot-challenges.pdf}, misc2 = {Online}, publisher = {Springer}, address = {Netherlands}, language = {en}, ISSN = {0929-6212}, DOI = {10.1007/s11277-011-0385-5}, reviewed = {1}, author = {Heer, Tobias and Garcia-Morchon, Oscar and Hummen, Ren{\'e} and Keoh, Sye Loong and Kumar, Sandeep S. and Wehrle, Klaus} } @Inproceedings { 2011-extremecom-bitsch-neighbordiscovery, title = {Perfect Difference Sets for Neighbor Discovery}, year = {2011}, month = {9}, day = {26}, pages = {1--6}, abstract = {We present an energy efficient neighbor discovery framework that enables Linux and TinyOS based systems to discover and connect to neighbors via IEEE 802.11 and IEEE 802.15.4, which are only available sporadically. Using quorum schemes, we schedule on and off times of the wireless transmitters, to guarantee mutual discovery with minimum power given a specific latency requirement. Neighbor discovery is fundamental to intermittently connected networks, such as disruption and delay tolerant networks and optimizing it, can lead to significant overall energy savings. Using perfect difference sets, our results indicate that we reduce the latency by up to 10 times at a duty cycle of 2\% compared to the state of the art. We further define and characterize our neighbor discovery scheme with respect to fairness for asymmetric energy scenarios. Using these results, we allow energy-harvesting applications to adjust neighbor discovery based on their current energy requirements as a well defined trade-off.}, keywords = {Neighbor Discovery; Sporadic Connectivity; Wireless Networks}, url = {fileadmin/papers/2011/2011-ExtremeCom-bitsch-NeighborDiscovery.pdf}, web_url = {http://www.cl.cam.ac.uk/\verb=~=fb375/extremecom/2011/program.html}, web_url2 = {http://dl.acm.org/citation.cfm?id=2414398\&CFID=194814085\&CFTOKEN=73001357}, misc2 = {Online}, editor = {Hui, Pan and Lindgren, Anders}, publisher = {ACM}, booktitle = {Proceedings of the 3rd Extreme Conference of Communication (ExtremeCom 2011), Manaus, Brazil}, event_place = {Manaus, Brazil}, event_name = {ExtremeCom 2011}, event_date = {26-30 September 2011}, language = {en}, ISBN = {978-1-4503-1079-6}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Wollgarten, Christoph and Schupp, Stefan and Wehrle, Klaus} } @Inproceedings { 2011-wirtz-chants, title = {Establishing Mobile Ad-Hoc Networks in 802.11 Infrastructure Mode}, year = {2011}, month = {9}, day = {23}, url = {fileadmin/papers/2011/2011-wirtz-chants.pdf}, misc = {Online}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the ACM MobiCom Workshop on Challenged Networks (Chants 2011), Las Vegas, NV, USA}, event_place = {Las Vegas, NV, USA}, event_name = {ACM MobiCom Workshop on Challenged Networks (Chants 2011)}, event_date = {2011-09-23}, language = {en}, ISBN = {978-1-4503-0870-0}, DOI = {10.1145/2030652.2030666}, reviewed = {1}, author = {Wirtz, Hanno and Heer, Tobias and Backhaus, Robert and Wehrle, Klaus} } @Inproceedings { 2011-ipin-bitsch-footpath-long, title = {FootPath: Accurate Map-based Indoor Navigation Using Smartphones}, year = {2011}, month = {9}, day = {21}, pages = {1--8}, abstract = {We present FootPath, a self-contained, map-based indoor navigation system. Using only the accelerometer and the compass readily available in modern smartphones we accurately localize a user on her route, and provide her with turn-by-turn instructions to her destination. To compensate for inaccuracies in step detection and heading estimation, we match the detected steps onto the expected route using sequence alignment algorithms from the field of bioinformatics. As our solution integrates well with OpenStreetMap, it allows painless and cost-efficient collaborative deployment, without the need for additional infrastructure.}, tags = {footpath}, url = {fileadmin/papers/2011/2011-IPIN-bitsch-footpath-long.pdf}, web_url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6071934\&tag=1}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 2011 International Conference on Indoor Positioning and Indoor Navigation (IPIN), Guimaraes, Portugal}, event_place = {Guimar{\~a}es, Portugal}, event_name = {2011 International Conference on Indoor Positioning and Indoor Navigation (IPIN)}, event_date = {21-23 September 2011}, language = {en}, ISBN = {978-1-4577-1803-8}, DOI = {http://dx.doi.org/10.1109/IPIN.2011.6071934}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Smith, Paul and Viol, Nicolai and Wehrle, Klaus} } @Inproceedings { 2011-ipin-bitsch-footpath, title = {FootPath: Accurate Map-based Indoor Navigation Using Smartphones (short paper)}, year = {2011}, month = {9}, day = {21}, pages = {1--4}, abstract = {We present FootPath, a self-contained, map-based indoor navigation system. Using only the accelerometer and the compass readily available in modern smartphones we accurately localize a user on her route, and provide her with turn-by-turn instructions to her destination. To compensate for inaccuracies in step detection and heading estimation, we match the de- tected steps onto the expected route using sequence alignment algorithms from the field of bioinformatics. As our solution integrates well with OpenStreetMap, it allows painless and cost-efficient collaborative deployment, without the need for additional infrastructure.}, note = {short paper (long paper is also available)}, tags = {footpath}, url = {fileadmin/papers/2011/2011-IPIN-bitsch-footpath.pdf}, web_url = {http://ipin2011.dsi.uminho.pt/PDFs/Shortpaper/17_Short_Paper.pdf}, web_url2 = {fileadmin/papers/2011/2011-IPIN-bitsch-footpath-slides.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the 2011 International Conference on Indoor Positioning and Indoor Navigation (IPIN), Guimaraes, Portugal}, event_place = {Guimar{\~a}es, Portugal}, event_name = {2011 International Conference on Indoor Positioning and Indoor Navigation (IPIN)}, event_date = {21-23 September 2011}, language = {en}, ISBN = {978-972-8692-63-6}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Smith, Paul and Wehrle, Klaus} } @Inproceedings { 2011-wintech-wirtz, title = {Demo: Establishing Mobile Ad-Hoc Networks in 802.11 Infrastructure Mode}, year = {2011}, month = {9}, day = {19}, pages = {89-90}, abstract = {Mobile Ad-Hoc Networks (MANETs) rely on the 802.11 ad- hoc mode to establish communication with nearby peers. In practice, this makes MANETs hard to realize. While 802.11-compliant mobile devices implement the ad-hoc mode on the hardware layer, the software layer typically does not implement support for ad-hoc networking in terms of ad-hoc routing and name resolution protocols. Modern mobile operating systems, such as Android and iOS, even hide the inherent ad-hoc functionality of the wireless card through restrictions in the OS. In contrast to this, support for the 802.11 infrastructure mode is a commodity. We propose establishing ad-hoc networks using the 802.11 infrastructure mode. In MA-Fi (Mobile Ad-Hoc Wi-Fi), a small core of mobile router nodes (RONs) provides infrastruc-ture mode network access to mobile station nodes (STANs). As RONs also act as a station in infrastructure networks of other RONs, MA-Fi achieves multi-hop communication between RON and STAN devices in the overall network. We show the creation and operation of mobile ad-hoc networks using MA-Fi. We focus on mobility of RONs and STANs as well as topology control in the overall network.}, url = {fileadmin/papers/2011/2011-wirtz-wintech.pdf}, misc = {Online}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the Sixth ACM International Workshop on Wireless Network Testbeds, Experimental evaluation and Characterization (WiNTECH 2011), Las Vegas, NV, USA}, event_place = {Las Vegas, Nevada, USA}, event_name = {The Sixth ACM International Workshop on Wireless Network Testbeds, Experimental evaluation and Characterization}, event_date = {2011-09-19}, language = {en}, ISBN = {978-1-4503-0867-0}, DOI = {10.1145/2030718.2030737}, reviewed = {1}, author = {Wirtz, Hanno and Backhaus, Robert and Hummen, Ren{\'e} and Wehrle, Klaus} } @Inproceedings { VaegsABW2011, title = {Efficient Power Management Using Out-of-Band Signaling}, year = {2011}, month = {9}, day = {16}, pages = {77-80}, abstract = {A tremendous amount of energy is wasted today, because computing devices are left running all the time even though they are needed only sporadically. Especially in office environments many devices (e.g., printers) are very rarely turned off, because they need to be available from time to time and because it is inconvenient having to switch them on and off manually. Existing solutions, such as Wake-on-LAN (WoL), provide support for managing the power consumption of the network devices remotely using an always-on data channel. However, these solutions are inefficient, because power to the network interface has to be maintained even when the host system is asleep just to ensure remote accessibility. We propose a Wireless Sensor Network (WSN) based out-of-band signaling architecture for network interfaces which minimizes the systems’ power consumption during the large idle periods when nobody is using them. This is done by separating the data and control channels on the Internet-enabled devices using a low-power out-of-band signaling channel based on battery driven, energy scavenging devices. Unlike existing solutions, which only allow parts of the system to go in sleep modes, our architecture allows the whole system, including the main power supply, to be shut down. Our initial investigation indicates a significant reduction in energy consumption of devices during idle times compared to the existing in-band signaling mechanisms such as WoL.}, keywords = {Energy Saving, Wireless Sensor Network, Out-of-Band Signalling}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2011/2011-vaegs-fgsn-ecocom.pdf}, misc2 = {Online}, booktitle = {Proceedings of the 10th GI/ITG KuVS Fachgespr{\"a}ch Drahtlose Sensornetze (FGSN), Paderborn, Germany}, institution = {RWTH Aachen University}, event_place = {Paderborn, Germany}, event_name = {10th GI/ITG KuVS Fachgespr{\"a}ch Drahtlose Sensornetze (FGSN11)}, event_date = {September 15-16, 2011}, language = {en}, reviewed = {1}, author = {Vaegs, Tobias and Alizai, Muhammad Hamad and Bitsch Link, J{\'o} Agila and Wehrle, Klaus} } @Inproceedings { 2011-wintech-alizai-tinywifi, title = {TinyWifi: Making Network Protocol Evaluation Portable Across Multiple Phy-Link Layers}, year = {2011}, month = {9}, pages = {19-27}, tags = {tinywifi}, url = {fileadmin/papers/2011/2010-09-tinywifi-alizai-wintech.pdf}, misc2 = {Online}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the Sixth ACM International Workshop on Wireless Network Testbeds, Experimental evaluation and Characterization (WiNTECH ), Las Vegas, NV, USA}, event_place = {Las Vegas, NV, USA}, event_name = {The 17th Annual International Conference on Mobile Computing and Networking}, event_date = {September 2011}, language = {en}, ISBN = {978-1-4503-0867-0}, DOI = {10.1145/2030718.2030725}, reviewed = {1}, author = {Alizai, Muhammad Hamad and Wirtz, Hanno and Kirchen, Bernhard and Vaegs, Tobias and Gnawali, Omprakash and Wehrle, Klaus} } @Inproceedings { 2011-kunz-mascots-performance-prediction, title = {Predicting Runtime Performance Bounds of Expanded Parallel Discrete Event Simulations}, year = {2011}, month = {7}, day = {25}, pages = {359 - 368}, tags = {horizon}, url = {fileadmin/papers/2011/2011-kunz-performance-prediction-mascots.pdf}, misc2 = {Online}, publisher = {IEEE Computer Society}, address = {Los Alamitos, CA, USA}, booktitle = {Proceedings of the 19th Annual Meeting of the IEEE International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS'11), Singapore}, event_place = {Singapore}, event_name = {19th Annual Meeting of the IEEE International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems}, event_date = {July 25-17, 2011}, language = {en}, ISBN = {978-1-4577-0468-0}, ISSN = {1526-7539}, DOI = {10.1109/MASCOTS.2011.15}, reviewed = {1}, author = {Kunz, Georg and Tenbusch, Simon and Gross, James and Wehrle, Klaus} } @Inproceedings { 2011-hummen-pisa-demo, title = {PISA-SA - Security and Mobility in a Collaborative Muni-Fi (Demo Abstract)}, year = {2011}, month = {6}, day = {15}, volume = {15}, pages = {35--36}, tags = {mobile_access}, url = {fileadmin/papers/2011/2011-hummen-wisec-pisa-sa-demo.pdf}, misc2 = {Online}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the fourth ACM Conference on Wireless Network Security, Hamburg, Germany}, event_place = {Hamburg, Germany}, event_name = {Wireless Network Security 2011 (WiSec 2011)}, language = {en}, ISSN = {1559-1662}, DOI = {10.1145/2073290.2073297}, reviewed = {1}, author = {Hummen, Ren{\'e} and Wirtz, Hanno and Viol, Nicolai and Heer, Tobias and Wehrle, Klaus} } @Inproceedings { 2011-icdcs-sasnauskas-sde, title = {Scalable Symbolic Execution of Distributed Systems}, year = {2011}, month = {6}, pages = {333-342}, abstract = {Recent advances in symbolic execution have proposed a number of promising solutions to automatically achieve high-coverage and explore non-determinism during testing. This attractive testing technique of unmodified software assists developers with concrete inputs and deterministic schedules to analyze erroneous program paths. Being able to handle complex systems' software, these tools only consider single software instances and not their distributed execution which forms the core of distributed systems. The step to symbolic distributed execution is however steep, posing two core challenges: (1) additional state growth and (2) the state intra-dependencies resulting from communication. In this paper, we present SDE—a novel approach enabling scalable symbolic execution of distributed systems. The key contribution of our work is two-fold. First, we generalize the problem space of SDE and develop an algorithm significantly eliminating redundant states during testing. The key idea is to benefit from the nodes' local communication minimizing the number of states representing the distributed execution. Second, we demonstrate the practical applicability of SDE in testing with three sensornet scenarios running Contiki OS.}, tags = {kleenet}, url = {fileadmin/papers/2011/2011-06-icdcs-sasnauskas-sde.pdf}, misc2 = {Druck}, publisher = {IEEE Computer Society}, address = {Los Alamitos, CA, USA}, booktitle = {Proceedings of the 31st IEEE International Conference on Distributed Computing Systems (ICDCS 2011), June 2011, Minneapolis, MN, USA}, language = {en}, ISBN = {978-0-7695-4364-2}, ISSN = {1063-6927}, DOI = {10.1109/ICDCS.2011.28}, reviewed = {1}, author = {Sasnauskas, Raimondas and Soria Dustmann, Oscar and Kaminski, Benjamin Lucien and Weise, Carsten and Kowalewski, Stefan and Wehrle, Klaus} } @Inproceedings { 2011-iscc-alizai-ble, title = {Efficient Online Estimation of Bursty Wireless Links}, year = {2011}, month = {6}, url = {fileadmin/papers/2011/2011-alizai-iscc-ble.pdf}, misc2 = {Online}, publisher = {IEEE Computer Society}, address = {Los Alamitos, CA, USA}, booktitle = {16th IEEE Symposium on Computers and Communications (ISCC), Kerkyra, Greece}, event_place = {Kerkyra, Greece}, language = {en}, ISBN = {978-1-4577-0678-3}, DOI = {10.1109/ISCC.2011.5983839}, reviewed = {1}, author = {Alizai, Muhammad Hamad and Wirtz, Hanno and Kunz, Georg and Grap, Benjamin and Wehrle, Klaus} } @Inproceedings { 2011-ipsn-alizai-pad, title = {Probabilistic Addressing: Stable Addresses in Unstable Wireless Networks}, year = {2011}, month = {4}, url = {fileadmin/papers/2011/2011-ipsn-alizai-pad.pdf}, misc2 = {Online}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the 10th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN 2011), Chicago, IL, USA}, event_place = {Chicago, IL, USA}, language = {en}, ISBN = {978-1-60558-988-6}, reviewed = {1}, author = {Alizai, Muhammad Hamad and Vaegs, Tobias and Landsiedel, Olaf and G{\"o}tz, Stefan and Bitsch Link, J{\'o} Agila and Wehrle, Klaus} } @Inproceedings { 2011-nsdi-slicetime-weingaertner, title = {SliceTime: A platform for scalable and accurate network emulation}, year = {2011}, month = {3}, day = {30}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2011/2011-weingaertner-nsdi-slicetime-camera_ready_14P.pdf}, misc2 = {Online}, publisher = {USENIX}, address = {Berkeley, CA, USA}, booktitle = {Proceedings of the 8th USENIX Symposium on Networked Systems Design and Implementation (NSDI '11), Boston, MA, USA}, event_place = {Boston, Massachusetts}, language = {en}, reviewed = {1}, author = {Weingaertner, Elias and Schmidt, Florian and vom Lehn, Hendrik and Heer, Tobias and Wehrle, Klaus} } @Miscellaneous { 2011-hummen-adaptationlayer, title = {A Security Protocol Adaptation Layer for the IP-based Internet of Things (Position Paper)}, year = {2011}, month = {3}, day = {25}, tags = {iotsec}, url = {fileadmin/papers/2011/2011-hummen-smartobjects-adaptationlayer.pdf}, misc2 = {Online}, howpublished = {Interconnecting Smart Objects with the Internet Workshop}, language = {en}, reviewed = {1}, author = {Hummen, Ren{\'e} and Heer, Tobias and Wehrle, Klaus} } @Inproceedings { 2011-kunz-omnetpp-horizon, title = {Runtime Efficient Event Scheduling in Multi-threaded Network Simulation}, year = {2011}, month = {3}, day = {21}, pages = {359-366}, abstract = {Developing an efficient parallel simulation framework for multiprocessor systems is hard. A primary concern is the considerable amount of parallelization overhead imposed on the event handling routines of the simulation framework. Besides more complex event scheduling algorithms, the main sources of overhead are thread synchronization and locking of shared data structures. As a result, the overhead of parallelization may easily outweigh the benefits of parallelization in comparison to classic sequential simulation. We introduce two efficient event handling schemes based on our parallel-simulation extension Horizon for the OMNeT++ simulator.First, we present a \textbackslashemph\{push-based event handling scheme\} to minimize the overhead of thread synchronization and locking. Second, we complement this scheme with a novel \textbackslashemph\{event scheduling algorithm\} that significantly reduces the overhead of parallel event scheduling. Lastly, we prove the correctness of our scheduling algorithm. Our evaluation reveals a total reduction in the event handling overhead of up to 16x when combining both schemes.}, tags = {horizon}, url = {fileadmin/papers/2011/2011-kunz-horizon-omnetworkshop.pdf}, misc2 = {Online}, publisher = {ICST}, address = {Brussels, Belgium}, booktitle = {Proceedings of the 4th International Workshop on OMNeT++ (OMNeT++'11), Barcelona, Spain}, event_place = {Barcelona, Spain}, event_name = {4th International Workshop on OMNeT++ (OMNeT++'11)}, event_date = {March 21, 2011}, language = {en}, ISBN = {978-1-936968-00-8}, DOI = {10.4108/icst.simutools.2011.245504}, reviewed = {1}, author = {Kunz, Georg and Stoffers, Mirko and Gross, James and Wehrle, Klaus} } @Inproceedings { 2011-weingaertner-device-driver-enabled, title = {Device-driver enabled Wireless Network Emulation}, year = {2011}, month = {3}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2011/2011-weingaertner-simutools-wifi-emu_camera-ready.pdf}, misc2 = {Online}, publisher = {ICST}, address = {Brussels, Belgium}, chapter = {Proceedings ot the4th International ICST Conference on Simulation Tools and Techniques (SIMUTools 2011)}, booktitle = {Proceedings of the 4th International ICST Conference on Simulation Tools and Techniques (SIMUTools 2011), Barcelona, Spain}, event_place = {Barcelona, Spain}, state = {accepted}, language = {en}, ISBN = {978-1-936968-00-8}, reviewed = {1}, author = {Weingaertner, Elias and vom Lehn, Hendrik and Wehrle, Klaus} } @Poster { 2011-03-vomLehn-NSDI-PrivacyOnWeb, title = {Work in Progress: Uncovering the Privacy Implications of Web Usage [Poster]}, year = {2011}, month = {3}, note = {poster and abstract}, url = {fileadmin/papers/2011/2011-03-vomLehn-NSDI-PrivacyOnWeb.pdf}, misc2 = {Online}, booktitle = {8th USENIX Symposium on Networked Systems Design and Implementation (NSDI '11), Boston, MA, USA}, organization = {Usenix}, event_place = {Boston, MA, USA}, event_name = {NSDI}, event_date = {March 30 – April 1, 2011}, state = {accepted}, language = {en}, reviewed = {1}, author = {vom Lehn, Hendrik and Bitsch Link, J{\'o} Agila and Wehrle, Klaus} } @Techreport { 2011-heer-draft-middle-auth, title = {End-Host Authentication for HIP Middleboxes (Version 4)}, year = {2011}, number = {draft-heer-hip-middle-auth-04}, abstract = {The Host Identity Protocol [RFC5201] is a signaling protocol for secure communication, mobility, and multihoming that introduces a cryptographic namespace. This document specifies an extension for HIP that enables middleboxes to unambiguously verify the identities of hosts that communicate across them. This extension allows middleboxes to verify the liveness and freshness of a HIP association and, thus, to secure access control in middleboxes.}, note = {Work in progress}, tags = {ietf, mobile_access}, url = {http://tools.ietf.org/html/draft-heer-hip-middle-auth-04}, misc2 = {Online}, institution = {Internet Engineering Task Force}, type = {Internet-Draft}, language = {en}, author = {Heer, Tobias and Komu, Miika and Hummen, Ren{\'e} and Wehrle, Klaus} } @Inproceedings { 2010-sensys-alizai-tinywifi, title = {Poster Abstract: TinyOS Meets Wireless Mesh Networks}, year = {2010}, month = {11}, pages = {429-430}, abstract = {We present TinyWifi, a nesC code base extending TinyOS to support Linux powered network nodes. It enables developers to build arbitrary TinyOS applications and protocols and execute them directly on Linux by compiling for the new TinyWifi platform. Using TinyWifi as a TinyOS platform, we expand the applicability and means of evaluation of wireless protocols originally designed for sensornets towards inherently similar Linux driven ad hoc and mesh networks.}, affiliation = {Received Best Poster Award}, url = {fileadmin/papers/2010/2010-11-alizai-tinywifi-sensys.pdf}, web_url = {http://portal.acm.org/citation.cfm?id=1870058\&preflayout=flat}, misc2 = {Print}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems (SenSys 2010), Zurich, Switzerland}, language = {en}, ISBN = {978-1-4503-0344-6}, DOI = {10.1145/1869983.1870058}, reviewed = {1}, author = {Alizai, Muhammad Hamad and Kirchen, Bernhard and Bitsch Link, J{\'o} Agila and Wirtz, Hanno and Wehrle, Klaus} } @Inproceedings { 2010-sensys-sasnauskas-coojakleenet, title = {Demo Abstract: Integrating Symbolic Execution with Sensornet Simulation for Efficient Bug Finding}, year = {2010}, month = {11}, pages = {383--384}, abstract = {High-coverage testing of sensornet applications is vital for pre-deployment bug cleansing, but has previously been difficult due to the limited set of available tools. We integrate the KleeNet symbolic execution engine with the COOJA network simulator to allow for straight-forward and intuitive high-coverage testing initiated from a simulation environment. A tight coupling of simulation and testing helps detect, narrow down, and fix complex interaction bugs in an early development phase. We demonstrate the seamless transition between COOJA simulation and KleeNet symbolic execution. Our framework enables future research in how high-coverage testing tools could be used in cooperation with simulation tools.}, tags = {kleenet}, url = {fileadmin/papers/2010/2010-osterlind_sasnauskas-sensys-coojakleenet.pdf}, misc2 = {Print}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems (SenSys 2010), Zurich, Switzerland}, language = {en}, ISBN = {978-1-4503-0344-6}, DOI = {http://doi.acm.org/10.1145/1869983.1870034}, reviewed = {1}, author = {{\"O}sterlind, Fredrik and Sasnauskas, Raimondas and Dunkels, Adam and Soria Dustmann, Oscar and Wehrle, Klaus} } @Proceedings { 2010-wirtz-kuvs-service-overlay, title = {A Generic Service Overlay for Wireless Mesh Networks}, year = {2010}, month = {10}, abstract = {Service discovery in traditional networks is realized either by broadcasting requests in the network or by a central entity that holds the necessary information of every service in the network. These techniques are applicable in wireless networks as well, however, only under certain limiting conditions. The authors present a generic overlay that caters to the special requirements of providing and discovering services in wireless mesh networks. The focus of the approach lies on maintaining scalability in large-scale dynamic networks as well as routing efficiency with regard to the communication characteristics of the underlying network.}, affiliation = {RWTH Aachen University - ComSys}, note = {/fileadmin/papers/2010/2010-wirtz-kuvs-service-overlay.pdf}, publisher = {Gesellschaft f{\"u}r Informatik KuVS}, address = {Berlin, Germany}, booktitle = {3rd GI/ITG KuVS Fachgespr{\"a}ch on NG SDPs, Berlin, Germany}, event_place = {Berlin, Germany}, event_name = {3rd GI/ITG KuVS Fachgespr{\"a}ch on NG SDPs}, event_date = {October 14, 2010}, language = {english}, author = {Wirtz, Hanno and Heer, Tobias and Wehrle, Klaus} } @Inproceedings { 2010softcomweingaertnerprotocolanalysis, title = {Flexible Analysis of Distributed Protocol Implementations using Virtual Time}, year = {2010}, month = {9}, day = {23}, pages = {225 - 229}, note = {available in IEEE Xplore}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2010/2010-weingaertner-softcom-analysis.pdf}, misc2 = {Online}, publisher = {FESB}, address = {Split, Croatia}, booktitle = {Proceedings of the 18th International Conference on Software, Telecommunications and Computer Networks (SoftCOM 2010)}, event_place = {Hvar, Croatia}, language = {en}, ISBN = {978-1-4244-8663-2}, reviewed = {1}, author = {Weingaertner, Elias and Ritter, Marko and Sasnauskas, Raimondas and Wehrle, Klaus} } @Inproceedings { 2010-kunz-mascots-horizon, title = {Expanding the Event Horizon in Parallelized Network Simulations}, year = {2010}, month = {8}, day = {18}, pages = {172-181}, abstract = {The simulation models of wireless networks rapidly increase in complexity to accurately model wireless channel characteristics and the properties of advanced transmission technologies. Such detailed models typically lead to a high computational load per simulation event that accumulates to extensive simulation runtimes. Reducing runtimes through parallelization is challenging since it depends on detecting causally independent events that can execute concurrently. Most existing approaches base this detection on lookaheads derived from channel propagation latency or protocol characteristics. In wireless networks, these lookaheads are typically short, causing the potential for parallelization and the achievable speedup to remain small. This paper presents Horizon, which unlocks a substantial portion of a simulation model's workload for parallelization by going beyond the traditional lookahead. We show how to augment discrete events with durations to identify a much larger horizon of independent simulation events and efficiently schedule them on multi-core systems. Our evaluation shows that this approach can significantly cut down the runtime of simulations, in particular for complex and accurate models of wireless networks.}, tags = {horizon}, url = {fileadmin/papers/2010/2010-kunz-mascots-horizon.pdf}, misc2 = {Online}, publisher = {IEEE Computer Society}, address = {Los Alamitos, CA, USA}, booktitle = {Proceedings of the 18th Annual Meeting of the IEEE/ACM International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS'10), Miami, FL, USA}, event_place = {Miami, FL, USA}, event_name = {18th Annual Meeting of the IEEE/ACM International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS'10)}, event_date = {August 17-19, 2010}, language = {en}, ISBN = {978-0-7695-4197-6}, ISSN = {1526-7539}, DOI = {10.1109/MASCOTS.2010.26}, reviewed = {1}, author = {Kunz, Georg and Landsiedel, Olaf and Gross, James and G{\"o}tz, Stefan and Naghibi, Farshad and Wehrle, Klaus} } @Inproceedings { 2010-heer-pisa-sa, title = {PiSA-SA: Municipal Wi-Fi Based on Wi-Fi Sharing}, year = {2010}, month = {8}, day = {2}, volume = {1}, pages = {588-593}, abstract = {With the goal of providing ubiquitous wireless services (e.g., tourist guides, environmental information, pedestrian navigation), municipal wireless networks are currently being established all around the world. For municipalities, it is often challenging to achieve the bandwidth and coverage that is necessary for many of the envisioned network services. At the same time, Wi-Fi-sharing communities achieve high bandwidth and good coverage at a very low cost by capitalizing on the dense deployment of private access points in urban areas. However, from a technical, conceptual, and security perspective, Wi-Fi sharing community networks resemble a patchwork of heterogeneous networks instead of one well-planned city-wide network. This patchwork character stands in stark contrast to a uniform, secure platform for public and commercial services desirable for the economic success of such a network. Hence, despite its cost-efficiency, the community-based approach cannot be adopted by municipalities easily. In this paper, we show how to realize municipal wireless services on top of a Wi-Fi-sharing infrastructure in a technically sound and economically attractive fashion. In particular, we focus on how to securely provide services to mobile clients with and without client-side software support. Our solution cleanly separates the roles of controlling and administering the network from providing bandwidth and wireless access. With this separation, commercial ISPs and citizens with their private Wi-Fi can contribute to the network infrastructure. This allows municipalities in turn to focus their resources on municipal wireless services.}, tags = {mobile_access}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2010/2010-heer-icc-pisa-sa.pdf}, misc2 = {Print}, publisher = {IEEE Press}, address = {Washington, DC, USA}, booktitle = {International Conference on Computer Communication Networks, ICCCN 2010, Zurich}, event_place = {Zurich, Switzerland}, event_name = {International Conference on Computer Communication Networks, ICCCN 2010}, language = {en}, ISBN = {978-1-4244-7114-0}, DOI = {10.1109/ICCCN.2010.5560103}, reviewed = {1}, author = {Heer, Tobias and Jansen, Thomas and Hummen, Ren{\'e} and Wirtz, Hanno and G{\"o}tz, Stefan and Weingaertner, Elias and Wehrle, Klaus} } @Inproceedings { icc2010vpsim, title = {Towards Network Centric Development of Embedded Systems}, year = {2010}, month = {5}, day = {23}, pages = {1-6}, abstract = {Nowadays, the development of embedded system hardware and related system software is mostly carried out using virtual platform environments. The high level of modeling detail (hardware elements are partially modeled in a cycle-accurate fashion) is required for many core design tasks. At the same time, the high computational complexity of virtual platforms caused by the detailed level of simulation hinders their application for modeling large networks of embedded systems. In this paper, we propose the integration of virtual platforms with network simulations, combining the accuracy of virtual platforms with the versatility and scalability of network simulation tools. Forming such a hybrid toolchain facilitates the detailed analysis of embedded network systems and related important design aspects, such as resource effectiveness, prior to their actual deployment.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2010/2010-schuermans-weingaertner-network_centric.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the IEEE International Conference on Communications (ICC), Cape Town, South Africa, May 23-27}, language = {en}, ISBN = {978-1-4244-6402-9}, ISSN = {1550-3607}, DOI = {10.1109/ICC.2010.5502185}, reviewed = {1}, author = {Sch{\"u}rmanns, Stefan and Weingaertner, Elias and Kempf, Torsten and Ascheid, Gerd and Wehrle, Klaus and Leupers, Rainer} } @Inproceedings { 201004vaegsieeestudentpad, title = {Probabilistic Addressing in Wireless Networks}, year = {2010}, month = {5}, day = {20}, pages = {5-8}, abstract = {The lack of permanent network infrastructure and often unplanned deployments in many multihop wireless communication scenarios restrict nodes to determine their own addresses based on the underlying connectivity in the network. However, due to unreliable connectivity and rapidly changing link qualities in wireless networks, establishing uniform addressing and stable point-to-point routing is challenging. In this paper, we present Statistical Vector Routing (SVR), a virtual coordinates based addressing and routing mechanism that efficiently deals with dynamic communication links in wireless networks. It assigns stable probabilistic addresses to nodes without the need to pessimistically estimate links over longer periods of time. The routing metric predicts the current location of a node in its address distribution. Our prototype implementation over real testbeds indicates that SVR, when compared to current approaches, achieves 3 times more stable addressing, reduces the magnitude of change in addresses by 2-10 times, and minimizes the hop distance and transmissions in the network by 10-15\%.}, tags = {wld}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2010/2010-vaegs-wehrle-probabilistic_addressing.pdf}, misc2 = {Print}, publisher = {Hamburg University of Technology}, address = {Hamburg, Germany}, booktitle = {Proceedings of the 2nd IEEE Student Conference, Hamburg University of Technology, Hamburg, Germany}, event_place = {Hamburg, Germany}, event_name = {2nd IEEE Student Conference, Hamburg University of Technology}, event_date = {May 20-21, 2010}, language = {en}, author = {Vaegs, Tobias and Alizai, Muhammad Hamad and Wehrle, Klaus} } @Inproceedings { 2010-ipsn-sasnauskas-kleenet, title = {KleeNet: Discovering Insidious Interaction Bugs in Wireless Sensor Networks Before Deployment}, year = {2010}, month = {4}, day = {12}, pages = {186--196}, abstract = {Complex interactions and the distributed nature of wireless sensor networks make automated testing and debugging before deployment a necessity. A main challenge is to detect bugs that occur due to non-deterministic events, such as node reboots or packet duplicates. Often, these events have the potential to drive a sensor network and its applications into corner-case situations, exhibiting bugs that are hard to detect using existing testing and debugging techniques. In this paper, we present KleeNet, a debugging environment that effectively discovers such bugs before deployment. KleeNet executes unmodified sensor network applications on symbolic input and automatically injects non-deterministic failures. As a result, KleeNet generates distributed execution paths at high-coverage, including low-probability corner-case situations. As a case study, we integrated KleeNet into the Contiki OS and show its effectiveness by detecting four insidious bugs in the uIP TCP/IP protocol stack. One of these bugs is critical and lead to refusal of further connections.}, keywords = {automated protocol testing, experimentation, failure detection, wireless sensor networks}, tags = {kleenet}, url = {fileadmin/papers/2010/2010-04-ipsn-sasnauskas-KleeNet.pdf}, misc2 = {Print}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the 9th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN 2010), Stockholm, Sweden}, language = {en}, ISBN = {978-1-60558-988-6}, DOI = {http://doi.acm.org/10.1145/1791212.1791235}, reviewed = {1}, author = {Sasnauskas, Raimondas and Landsiedel, Olaf and Alizai, Muhammad Hamad and Weise, Carsten and Kowalewski, Stefan and Wehrle, Klaus} } @Inproceedings { 201004IPSNbitschratmote, title = {Demo Abstract: RatMote - A Sensor Platform for Animal Habitat Monitoring}, year = {2010}, month = {4}, day = {12}, pages = {432--433}, abstract = {In this work, we present RatMote, a new wireless sensor node for subterranean animal habitat monitoring. RatMote has been developed for project RatPack, which aims at creating a new method for behavioral research on rats in their natural environment using wireless sensor nodes. Recent development in microcontroller architecture allowed us to design a sensor node which calculates up to 22 times more operations per mAh than the widely used TelosB node. This significant performance and efficiency increase allows us to perform computationally demanding algorithms inside the node, needed for vocalization analysis, localization, and mapping.}, note = {Demo Abstract}, tags = {RatPack}, url = {fileadmin/papers/2010/2010-04-IPSN-bitsch-ratmote.pdf}, web_url = {http://doi.acm.org/10.1145/1791212.1791291}, misc2 = {Online}, publisher = {ACM}, address = {New York City, NY, USA}, series = {IPSN '10}, booktitle = {Proceedings of the 9th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN 2010), Stockholm, Sweden}, organization = {ACM}, event_place = {Stockholm, Sweden}, event_name = {9th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN 2010)}, event_date = {April 12-16, 2010}, language = {en}, ISBN = {978-1-60558-988-6}, DOI = {http://doi.acm.org/10.1145/1791212.1791291}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Bretgeld, Thomas and Goliath, Andr{\'e} and Wehrle, Klaus} } @Inproceedings { 20104-IPSN-alizai-svr, title = {Poster Abstract: Statistical Vector based Point-to-Point Routing in Wireless Networks}, year = {2010}, month = {4}, day = {12}, pages = {366-367}, abstract = {We present Statistical Vector Routing (SVR), a protocol that efficiently deals with communication link dynamics in wireless networks. It assigns virtual coordinates to nodes based on the statistical distribution of their distance from a small set of beacons. The distance metric predicts the current location of a node in its address distribution. Our initial results from a prototype implementation over real testbeds demonstrate the feasibility of SVR.}, tags = {wld}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2010/2010-alizai-ipsn-pad.pdf}, web_url = {http://portal.acm.org/citation.cfm?id=1791257}, misc2 = {Print}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the 9th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN 2010), Stockholm, Sweden}, event_place = {Stockholm, Sweden}, event_name = {9th ACM/IEEE International Conference on Information Processing in Sensor Networks (IPSN 2010)}, event_date = {April 12-16, 2010}, language = {en}, ISBN = {978-1-60558-988-6}, reviewed = {1}, author = {Alizai, Muhammad Hamad and Vaegs, Tobias and Landsiedel, Olaf and Sasnauskas, Raimondas and Wehrle, Klaus} } @Inproceedings { 201004vaegsjscsvr, title = {Poster: A Statistical Vector based Routing Protocol for Wireless Networks}, year = {2010}, month = {4}, day = {7}, pages = {279-280}, abstract = {We present Statistical Vector Routing (SVR), a protocol that efficiently deals with the dynamics shown by communication links of wireless networks. It assigns virtual coordinates to nodes based on the statistical distribution of their distance from a small set of beacons. The distance metric predicts the current location of a node in its address distribution. Our initial results from a prototype implementation over real testbeds demonstrate the feasibility of SVR.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2010/2010-alizai-ipsn-pad.pdf}, misc = {Poster}, misc2 = {Print}, editor = {Hans K. Kaiser and Raimund Kirner}, publisher = {Vienna University of Technology}, address = {Karlsplatz 13, 1040 Vienna, Austria}, booktitle = {Proceedings of the Junior Scientist Conference 2010, Vienna, Austria}, event_place = {Vienna, Austria}, event_name = {The Junior Scientist Conference}, event_date = {April 7-9, 2010}, language = {en}, ISBN = {978-3-200-01797-9}, author = {Vaegs, Tobias and Wehrle, Klaus} } @Inproceedings { 2010-percomws-heer-munifi, title = {Collaborative Municipal Wi-Fi Networks - Challenges and Opportunities}, journal = {Proceedings of the Sixth IEEE PerCom Workshop on Pervasive Wireless Networking (PWN 2010), IEEE.}, year = {2010}, month = {4}, day = {2}, volume = {1}, pages = {588 - 593}, abstract = {Municipal Wi-Fi networks aim at providing Internet access and selected mobile network services to citizens, travelers, and civil servants. The goals of these networks are to bridge the digital divide, stimulate innovation, support economic growth, and increase city operations efficiency. While establishing such urban networks is financially challenging for municipalities, Wi-Fi-sharing communities accomplish good coverage and ubiquitous Internet access by capitalizing on the dense deployment of private access points in urban residential areas. By combining Wi-Fi communities and municipal Wi-Fi, a collaborative municipal Wi-Fi system promises cheap and ubiquitous access to mobile city services. However, the differences in intent, philosophy, and technical realization between community and municipal Wi-Fi networks prevent a straight-forward combination of both approaches. In this paper, we highlight the conceptual and technical challenges that need to be solved to create collaborative municipal Wi-Fi networks.}, tags = {mobile_access}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2010/2010-heer-percomws-collaborative-municipal-wi-fi.pdf}, misc2 = {Print}, publisher = {IEEE Press}, address = {Washington, DC, USA}, booktitle = {Proceedings of the Sixth IEEE PerCom Workshop on Pervasive Wireless Networking (PWN 2010), Mannheim, Germany.}, event_place = {Mannheim, Germany}, event_name = {Sixth IEEE PerCom Workshop on Pervasive Wireless Networking (PWN 2010)}, event_date = {April 02, 2010}, language = {en}, ISBN = {978-1-4244-6605-4}, DOI = {10.1109/PERCOMW.2010.5470505}, author = {Heer, Tobias and Hummen, Ren{\'e} and Viol, Nicolai and Wirtz, Hanno and G{\"o}tz, Stefan and Wehrle, Klaus} } @Inproceedings { 2010-bitsch-link-iq2s-burrowview, title = {BurrowView - Seeing the world through the eyes of rats}, year = {2010}, month = {3}, day = {29}, pages = {56 -- 61}, abstract = {For a long time, life sciences were restricted to look at animal habitats only post-factum. Pervasive computing puts us in the novel position to gain live views. In this paper we present BurrowView, an application that tracks the movement of rats in their natural habitat and reconstructs the underground tunnel system. To make reliable statements, special consideration has been taken with regard to the information quality. Our system is able to reconstruct paths up to a resolution of 20 cm, the length of a rat without its tail.}, tags = {RatPack}, url = {fileadmin/papers/2010/2010-03-IQ2S-link-burrowview.pdf}, web_url2 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5470603}, misc2 = {Online}, publisher = {IEEE}, address = {New York City, NY, USA}, booktitle = {Proceedings of the Second IEEE International Workshop on Information Quality and Quality of Service for Pervasive Computing (IQ2S 2010), Mannheim, Germany}, organization = {IEEE}, event_place = {Mannheim, Germany}, event_name = {Second IEEE International Workshop on Information Quality and Quality of Service for Pervasive Computing (IQ2S 2010)}, event_date = {March 29 to April 2, 2010}, language = {en}, ISBN = {978-1-4244-6605-4}, DOI = {10.1109/PERCOMW.2010.5470603}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Fabritius, Gregor and Alizai, Muhammad Hamad and Wehrle, Klaus} } @Inproceedings { inproceedingsreference201001221179332027, title = {Towards a Flexible and Versatile Cross-Layer-Coordination Architecture}, year = {2010}, month = {3}, day = {15}, pages = {1-5}, abstract = {In wireless and mobile networking, volatile environ- mental conditions are a permanent challenge, resulting in a demand for cross-layer optimizations. To further increase flexibility, we believe cross-layer architectures should adapt themselves to these changing conditions, just as they adapt the network stack, devices, and applications. In this paper, we propose CRAWLER, a novel cross-layer architecture that combines three core properties: signaling between all layers and system components; extensibility and adaptability at runtime; and high usability for cross-layer developers. CRAWLER increases flexibility, as well as expediting and simplifying cross- layer development.}, note = {Work in Progress session}, tags = {crawler}, url = {fileadmin/papers/2010/2010-03-infocom-aktas-crawler.pdf}, misc2 = {Print}, publisher = {IEEE}, booktitle = {Proceedings of the 2010 INFOCOM IEEE Conference on Computer Communications Workshops, San Diego, CA, USA}, language = {en}, ISBN = {978-1-4244-6739-6}, reviewed = {1}, author = {Aktas, Ismet and Otten, Jens and Schmidt, Florian and Wehrle, Klaus} } @Inbook { 201001ThieleINTECHRatpack, title = {Dynamic Wireless Sensor Networks for Animal Behavior Research}, year = {2010}, month = {1}, pages = {629--644}, tags = {RatPack}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2010/2010-01-Thiele-INTECH-Ratpack.pdf}, web_url = {http://sciyo.com/articles/show/title/dynamic-wireless-sensor-networks-for-animal-behavior-research}, web_url2 = {http://www.intechopen.com/articles/show/title/dynamic-wireless-sensor-networks-for-animal-behavior-research}, misc2 = {Online}, editor = {Domenico Campolo}, publisher = {InTech}, address = {Vienna, Austria}, chapter = {32}, booktitle = {Recent Advances in Biomedical Engineering}, language = {en}, ISBN = {978-953-7619-57-2}, reviewed = {1}, author = {Thiele, Johannes and Bitsch Link, J{\'o} Agila and Osechas, Okuary and Mallot, Hanspeter and Wehrle, Klaus} } @Inproceedings { 20105munawardynamictinyos, title = {Dynamic TinyOS: Modular and Transparent Incremental Code-Updates for Sensor Networks}, year = {2010}, pages = {1-6}, abstract = {Long-term deployments of sensor networks in physically inaccessible environments make remote re-programmability of sensor nodes a necessity. Ranging from full image replacement to virtual machines, a variety of mechanisms exist today to deploy new software or to fix bugs in deployed systems. However, TinyOS - the current state of the art sensor node operating system - is still limited to full image replacement as nodes execute a statically-linked system-image generated at compilation time. In this paper we introduce Dynamic TinyOS to enable the dynamic exchange of software components and thus incrementally update the operating system and its applications. The core idea is to preserve the modularity of TinyOS, i.e. its componentization, which is lost during the normal compilation process, and enable runtime composition of TinyOS components on the sensor node. The proposed solution integrates seamlessly into the system architecture of TinyOS: It does not require any changes to the programming model of TinyOS and existing components can be reused transparently. Our evaluation shows that Dynamic TinyOS incurs a low performance overhead while keeping a smaller - upto one third - memory footprint than other comparable solutions.}, url = {fileadmin/papers/2010/2010-05-icc-munawar-DynamicTinyOS.pdf}, misc2 = {Online}, publisher = {IEEE}, booktitle = {Proceedings of the IEEE International Conference on Communications (ICC), Cape Town, South Africa}, language = {en}, ISBN = {978-1-4244-6402-9}, ISSN = {1550-3607}, reviewed = {1}, author = {Munawar, Waqaas and Alizai, Muhammad Hamad and Landsiedel, Olaf and Wehrle, Klaus} } @Inproceedings { 2010-ARCS-alizai-promotingpower, title = {Promoting Power to a First Class Metric in Network Simulations}, year = {2010}, pages = {387-392}, abstract = {Accurate prediction of energy consumption early in the design process is essential to efficiently optimize algorithms and protocols. However, despite energy efficiency gathering significant attention in networking research, limited effort has been invested in providing requisite evaluation tools and models. Hence, developers demand powerful evaluation tools to assist them in comparing new communication paradigms in terms of energy efficiency, and minimizing the energy requirements of algorithms. In this paper, we argue for promoting energy to a first class metric in network simulations. We explore the challenges involved in modelling energy in network simulations and present a detailed analysis of different modelling techniques. Finally, we discuss their applicability in high-level network simulations.}, url = {fileadmin/papers/2010/2010-2-ARCS-alizai-promoting-power.pdf}, misc2 = {Print}, publisher = {VDE-VERLAG}, address = {Berlin, Germany}, booktitle = {Proceedings of the Workshop on Energy Aware Systems and Methods, in conjunction with GI/ITG ARCS 2010 Hannover, Feb. 21-23}, language = {en}, ISBN = {978-3-8007-3222-7}, reviewed = {1}, author = {Alizai, Muhammad Hamad and Kunz, Georg and Landsiedel, Olaf and Wehrle, Klaus} } @Inproceedings { 201003GarciaEffContAwareAccControlPMS, title = {Efficient and Context-Aware Access Control for Pervasive Medical Sensor Networks}, year = {2010}, booktitle = {Proceedings of the First IEEE PerCom Workshop on Pervasive Healthcare}, author = {Garcia-Morchon, Oscar and Wehrle, Klaus} } @Inproceedings { 201006GarciaIFIPTM, title = {On Applications of Cooperative Security in Distributed Networks}, year = {2010}, abstract = {ManyapplicationsrunningontheInternetoperateinfullyor semi-distributed fashion including P2P networks or social networks. Dis- tributed applications exhibit many advantages over classical client-server models regarding scalability, fault tolerance, and cost. Unfortunately, the distributed system operation also brings many security threats along that challenge their performance and reliability. In particular, faulty or mis- behaving nodes cannot collude to subvert the system operation. This paper addresses the above threats by applying cooperative security techniques to relevant distributed systems in the Internet. Our goal is to present methods that allow the peers to bootstrap basic trust relation- ships at the time of joining a distributed network and remove the peers if trust is lost. We consider the specific security caveats of the analyzed sys- tems, investigate the applicability of existing cooperative security-based protocols, and propose general design guidelines for cooperative-security protocol in described distributed systems.}, misc2 = {Print}, publisher = {Springer}, address = {Berlin}, booktitle = {Proceedings of IFIPTM 2010 - 4th International Conference on Trust Management}, event_place = {Morioka, Japan}, event_name = {4th International Conference on Trust Management}, language = {en}, ISBN = {978-3-642-13445-6}, reviewed = {1}, author = {Kuptsov, Dmitriy and Garcia-Morchon, Oscar and Wehrle, Klaus and Gurtov, Andrei} } @Inproceedings { 201006GarciaSacmat, title = {Modular Context-Aware Access Control for Medical Sensor Network}, year = {2010}, abstract = {Medical sensor networks allow for pervasive health monitoring of users in hospitals, at home, or on the way. The privacy and confidentiality of medical data need to be guaranteed at any moment to make sure that unauthorized parties cannot retrieve confidential information. This is a great challenge due to two main reasons. First, wireless sensors are resource-constrained devices that limit the applicability of traditional solutions. Second, the access control system must be context-aware and adapt its security settings to ensure the users' safety during, e.g., medical emergencies. To solve these issues, this paper presents a modular context-aware access control system tailored to pervasive medical sensor networks in which the access control decisions and the response delay depend upon the health acuteness of a user. Our system extends traditional role-based access control systems by allowing for context-awareness in critical, emergency, and normal access control situations. We further present a lightweight encoding for our modular access control policies as well as an access control engine efficiently running on resource-constrained sensor nodes. Finally, we analyze how the proposed access control system suits existing security architectures for medical sensor networks.}, address = {Pittsburgh, USA}, booktitle = {Proceedings of ACM Symposium on Access Control Models and Technologies (SACMAT'10)}, organization = {ACM}, ISBN = {978-1-4503-0049-0}, DOI = {10.1145/1809842.1809864}, reviewed = {1}, author = {Garcia-Morchon, Oscar and Wehrle, Klaus} } @Inproceedings { 200912BitschSimBetAge, title = {SimBetAge: Dealing with Change in Social Networks for Pocket Switched Networks}, year = {2009}, month = {12}, day = {1}, pages = {13--18}, abstract = {In this paper, we present SimBetAge, a delay and disruption tolerant routing protocol for highly dynamic socially structured mobile networks. We exploit the lightweight and egocentric scheme of SimBet routing while at the same time taking the strength and the gradual aging of social relations into account and thereby increase the performance by one order of magnitude, especially in evolving network structures. We explore the model of similarity and betweenness over weighted graphs, and present a simulation on realistic traces from previous experiments, comparing our approach to the original SimBet, Epidemic Routing and Prophet.}, tags = {RatPack}, url = {fileadmin/papers/2009/2009-12-Bitsch-SimBetAge.pdf}, web_url = {http://portal.acm.org/citation.cfm?id=1659029.1659034\&coll=DL\&dl=GUIDE\&CFID=6806120\&CFTOKEN=29162094}, web_url2 = {http://conferences.sigcomm.org/co-next/2009/workshops/unet/papers/Link.pdf}, misc2 = {Online}, editor = {Paulo Mendes, Oliver Marc{\'e}}, publisher = {ACM}, address = {New York City, NY, USA}, series = {U-NET '09}, booktitle = {Proceedings of the 1st ACM workshop on User-provided networking: challenges and opportunities, Rome, Italy}, organization = {ACM}, event_place = {Rome, Italy}, event_name = {1st ACM workshop on User-provided networking: challenges and opportunities}, event_date = {1 Dec. 2009}, language = {en}, ISBN = {978-1-60558-750-9}, DOI = {http://doi.acm.org/10.1145/1659029.1659034}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Viol, Nicolai and Goliath, Andr{\'e} and Wehrle, Klaus} } @Inproceedings { 2009-sensys-alizai-burstytraffic, title = {Bursty Traffic over Bursty Links}, year = {2009}, month = {11}, pages = {71-84}, tags = {wld}, url = {fileadmin/papers/2009/2009-alizai-sensys-bre.pdf}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceeding of 7th ACM Conference on Embedded Networked Sensor Systems (Sensys 09), Berkeley, CA, USA}, event_place = {Berkley, California}, event_name = {Sensys 09}, event_date = {November 2009}, language = {en}, ISBN = {978-1-60558-519-2}, reviewed = {1}, author = {Alizai, Muhammad Hamad and Landsiedel, Olaf and Bitsch Link, J{\'o} Agila and G{\"o}tz, Stefan and Wehrle, Klaus} } @Inproceedings { 2009-kunz-mascots-horizon, title = {Poster Abstract: Horizon - Exploiting Timing Information for Parallel Network Simulation}, year = {2009}, month = {9}, day = {21}, pages = {575-577}, abstract = {This paper presents Horizon, an extension to network simulation that enables the efficient and detailed simulation of wireless networks. Our contributions are two-fold as Horizon provides i) an API for accurately modeling processing time of discrete event simulation models by augmenting events with time spans and ii) a lightweight parallelization scheme that utilizes timing information to guide the parallel execution of simulations on multi-core computers. In this paper we primarily focus on the latter.}, tags = {horizon}, url = {fileadmin/papers/2009/2009-kunz-mascots-horizon.pdf}, misc = {Poster}, misc2 = {Online}, publisher = {IEEE Computer Society}, address = {Los Alamitos, CA, USA}, booktitle = {Proceedings of the 17th Annual Meeting of the IEEE International Symposium on Modelling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS'09), London, UK}, event_place = {London, Great Britain}, event_name = {17th Annual Meeting of the IEEE International Symposium on Modelling, Analysis and Simulation of Computer and Telecommunication Systems (MASCOTS'09)}, event_date = {September 21-32, 2009}, language = {en}, ISBN = {978-1-4244-4926-2}, ISSN = {1526-7539}, DOI = {10.1109/MASCOT.2009.5366710}, reviewed = {1}, author = {Kunz, Georg and Landsiedel, Olaf and Wehrle, Klaus} } @Techreport { 200908munawarfgsndynamictinyos, title = {Remote Incremental Adaptation of Sensor Network Applications}, year = {2009}, month = {9}, pages = {9-12}, url = {fileadmin/papers/2009/2009-08-munawar-fgsn-dynamic-tinyos.pdf}, web_url = {http://doku.b.tu-harburg.de/volltexte/2009/581/pdf/proceedings.pdf}, misc2 = {Print}, publisher = {Technical University Hamburg}, address = {Technical University Hamburg}, booktitle = {Proceedings of the 8th GI/ITG KuVS Fachgespr{\"a}ch ''Wireless Sensor Networks'', Hamburg, Germany}, institution = {Technical University Hamburg}, language = {en}, author = {Munawar, Waqaas and Landsiedel, Olaf and Alizai, Muhammad Hamad and Wehrle, Klaus} } @Techreport { 200908alizaifgsnburstyrouting, title = {Routing Over Bursty Wireless Links}, year = {2009}, month = {9}, pages = {63-66}, abstract = {Accurate estimation of link quality is the key to enable efficient routing in wireless sensor networks. Current link estimators focus mainly on identifying long-term stable links for routing, leaving out a potentiality large set of intermediate links offering significant routing progress. Fine-grained analysis of link qualities reveals that such intermediate links are bursty, i.e., stable in the short term. In this paper, we use short-term estimation of wireless links to accurately identify short-term stable periods of transmission on bursty links. Our approach allows a routing protocol to forward packets over bursty links if they offer better routing progress than long-term stable links. We integrate a Short Term Link Estimator and its associated routing strategy with a standard routing protocol for sensor networks. Our evaluation reveals an average of 22\% reduction in the overall transmissions when routing over long-range bursty links. Our approach is not tied to any special routing protocol and integrates seamlessly with existing routing protocols and link estimators.}, tags = {wld}, url = {fileadmin/papers/2009/2009-08-alizai-fgsn-bursty-routing.pdf}, web_url = {doku.b.tu-harburg.de/volltexte/2009/581/pdf/proceedings.pdf}, misc2 = {Print}, publisher = {Technical University Hamburg}, address = {Technical University Hamburg}, booktitle = {Proceedings of the 8th GI/ITG KuVS Fachgespr{\"a}ch ''Wireless Sensor Networks'', Hamburg, Germany}, language = {en}, reviewed = {1}, author = {Alizai, Muhammad Hamad and Landsiedel, Olaf and Bitsch Link, J{\'o} Agila and G{\"o}tz, Stefan and Wehrle, Klaus} } @Inproceedings { 2009-landsiedel-visa-vipe, title = {A Virtual Platform for Network Experimentation}, year = {2009}, month = {8}, day = {17}, pages = {45--52}, abstract = {Although the diversity of platforms for network experimentation is a boon to the development of protocols and distributed systems, it is challenging to exploit its benefits. Implementing or adapting the systems under test for such heterogeneous environments as network simulators, network emulators, testbeds, and end systems is immensely time and work intensive. In this paper, we present VIPE, a unified virtual platform for network experimentation, that slashes the porting effort. It allows to smoothly evolve a single implementation of a distributed system or protocol from its design up into its deployment by leveraging any form of network experimentation tool available.}, keywords = {deployment, network experimentation, resource virtualization, simulation}, url = {fileadmin/papers/2009/2009-landsiedel-visa-vipe.pdf}, misc2 = {Print}, publisher = {ACM Press}, address = {New York, NY, USA}, booktitle = {Proceedings of the 1st ACM SIGCOMM Workshop on Virtualized Infastructure Systems and Architectures, Barcelona, Spain}, event_place = {Barcelona, Spain}, event_name = {1st ACM SIGCOMM Workshop on Virtualized Infastructure Systems and Architectures}, event_date = {August 17, 2009}, language = {en}, ISBN = {978-1-60558-595-6}, DOI = {10.1145/1592648.1592657}, reviewed = {1}, author = {Landsiedel, Olaf and Kunz, Georg and G{\"o}tz, Stefan and Wehrle, Klaus} } @Inproceedings { securityforpervasivemedicalsensornetworks, title = {Security for Pervasive Medical Sensor Networks}, year = {2009}, month = {7}, day = {13}, volume = {1}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2009/2009-garcia-mobiq.pdf}, misc2 = {Print}, publisher = {IEEE Press}, address = {Washington, DC, USA}, booktitle = {6th Annual International Conference on Mobile and Ubiquitous Systems (MobiQuitous 2009), Toronto}, organization = {ICST/IEEE}, event_place = {Toronto, CAN}, event_name = {6th Annual International Conference on Mobile and Ubiquitous Systems (MobiQuitous 2009)}, language = {en}, ISBN = {978-963-9799-59-2}, DOI = {10.4108/ICST.MOBIQUITOUS2009.6832}, reviewed = {1}, author = {Garcia-Morchon, Oscar and Falck, Thomas and Heer, Tobias and Wehrle, Klaus} } @Inproceedings { 200907BitschMOBIQUITOUS09SimBetAge, title = {SimBetAge: Utilizing Temporal Changes in Social Networks for Delay/Disconnection Tolerant Networking}, year = {2009}, month = {7}, day = {13}, pages = {1--2}, abstract = {In this paper, we present SimBetAge, an extension to SimBet taking into account the gradual aging of connections in social networks which thereby increases the performance by an order of magnitude, especially in evolving network structures. For this purpose, we redefine similarity and betweenness to make use of weighted social network graphs.}, note = {poster and abstract}, tags = {RatPack}, url = {fileadmin/papers/2009/2009-07-Bitsch-Mobiquitous09-SimBetAge.pdf}, web_url2 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5326363}, misc2 = {Online}, publisher = {IEEE}, address = {New York City, NY, USA}, booktitle = {Proceedings of the 6th Annual International Conference on Mobile and Ubiquitous Systems (MobiQuitous 2009), Toronto, ON, Canada}, organization = {ICST/IEEE}, event_place = {Toronto, ON, Canada}, event_name = {6th Annual International Conference on Mobile and Ubiquitous Systems (MobiQuitous 2009)}, event_date = {July 13-16, 2009}, language = {en}, ISBN = {978-963-9799-59-2}, DOI = {10.4108/ICST.MOBIQUITOUS2009.7017}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Viol, Nicolai and Goliath, Andr{\'e} and Wehrle, Klaus} } @Poster { 2009-kunz-nsdi-profab, title = {Poster Abstract: Protocol Factory: Reuse for Network Experimentation}, year = {2009}, month = {4}, day = {22}, url = {fileadmin/papers/2009/2009-kunz-nsdi-protocolFactory.pdf}, misc = {Poster}, misc2 = {Online}, publisher = {USENIX Association}, address = {Berkeley, CA, USA}, booktitle = {6th USENIX Symposium on Networked Systems Design and Implementation (NSDI'09)}, language = {en}, reviewed = {1}, author = {Kunz, Georg and Landsiedel, Olaf and G{\"o}tz, Stefan and Wehrle, Klaus} } @Article { 200803WeingaertnerPromox, title = {ProMoX: A protocol stack monitoring framework}, journal = {Electronic Communications of the EASST}, year = {2009}, month = {3}, volume = {17}, number = {2009}, pages = {1-10}, abstract = {In this paper, we present a preliminary glance on our framework for protocol stack monitoring using Xen (ProMoX). ProMoX uses the Xen hypervisor to virtualize entire instances of operating systems which may execute any arbitrary protocol implementation. By utilizing system virtualization for external monitoring, ProMoX can transparently inspect any protocol state and performance metrics of protocol implementations carried by a guest operating system. This way, ProMoX supports both the indentification of faults within early prototypes as well as the evaluation of new protocol designs.}, note = {Accepted for publication}, misc2 = {online}, publisher = {EASST}, address = {Kassel, Germany}, booktitle = {Proceedings of the GI/ITG KIVS Workshop on Overlay and Network Virtualization 2009}, language = {en}, ISSN = {1863-2122}, reviewed = {1}, author = {Weingaertner, Elias and Terwelp, Christoph and Wehrle, Klaus} } @Article { 2009AlizaiPIKtimingenergy, title = {Modelling Execution Time and Energy Consumption in Sensor Node Simulation}, journal = {PIK Journal, Special Issue on Energy Aware Systems}, year = {2009}, month = {2}, volume = {32}, number = {2}, pages = {127-132}, url = {fileadmin/papers/2009/2009-2-alizai-modeling-energy.pdf}, misc2 = {Print}, language = {en}, ISSN = {0930-5157}, reviewed = {1}, author = {Alizai, Muhammad Hamad and Landsiedel, Olaf and Wehrle, Klaus} } @Article { inproceedingsreference200903099502213244, title = {Time accurate integration of software prototypes with event-based network simulations}, journal = {Proceedings of the 11th Joint International Conference on Measurement and Modeling of Computer Systems (SIGMETRICS/Performance 2009)}, year = {2009}, volume = {37}, number = {2}, pages = {49-50}, note = {Accepted as poster presentation.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2009/2009-weingaertner-time-accurate-sigmetrics09.pdf}, misc2 = {Print}, publisher = {ACM SIGMETRICS}, address = {New York, NY, USA}, organization = {ACM}, language = {en}, ISSN = {0163-5999}, DOI = {10.1145/1639562.1639580}, reviewed = {1}, author = {Weingaertner, Elias and Schmidt, Florian and Heer, Tobias and Wehrle, Klaus} } @Proceedings { 2009-Weingaertner-ICC-NetworkSimulator-Comparison, title = {A performance comparison of recent network simulators}, year = {2009}, abstract = {A widespread methodology for performance analysis in the field of communication systems engineering is network simulation. While ns-2 has established itself as virtually the standard network simulation tool, other network simulators have gained more and more attention during the last years. In this paper, we briefly survey new developments in the field of network simulation and conduct a performance comparison study by implementing an identical simulation set-up in five simulators, namely ns-2, OMNet++, ns-3, SimPy and JiST/SWANS. Our results reveal large differences according to both run-time performance and memory usage.}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2009/2009-weingaertner-simulator_comparison.pdf}, misc2 = {Print}, publisher = {IEEE}, booktitle = {Proceedings of the IEEE International Conference on Communications 2009 (ICC 2009)}, event_place = {Dresden, Germany}, language = {en}, reviewed = {1}, author = {Weingaertner, Elias and vom Lehn, Hendrik and Wehrle, Klaus} } @Inproceedings { 200906MobiArchgoetzprotocolorchestration, title = {Protocol Orchestration: A Semantic Approach to Communication Stacks}, year = {2009}, pages = {43-50}, abstract = {The diversity of today's networking environments, such as wired, wireless, cell-based, or multi-hop, is matched by an equally large amount and heterogeneity of specialized protocols, e.g., overlays, Wi-Fi positioning, MANET routing, cross-layer signaling. However, communication is typically performed with a static set of protocols selected at design time based on simplified assumptions ignoring the environment's heterogeneity. In this paper, we argue that protocols can be orchestrated as software components driven purely by their functionality and the demands of the execution environment. Our end-system protocol framework Adapt bases on extensible ontological models that semantically describe protocol and environment properties. At runtime, each connection receives a custom-tailored protocol stack that Adapt orchestrates from the requirements derived from the application, user, and environment. With this approach, end-systems can reason about the functionality and quality of automatically composed and adapted protocol compounds while remaining open to existing and future protocols.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2009/2009-goetz-mobiarch-protocol-orchestration.pdf}, misc2 = {print}, editor = {Krzysztof Zielinski and Adam Wolisz and Jason Flinn and Anthony LaMarca}, publisher = {ACM}, address = {New York, NY, USA}, howpublished = {print}, booktitle = {Proceedings of the Fourth ACM International Workshop on Mobility in the Evolving Internet Architecture (ACM MobiArch '09)}, organization = {ACM Sigcomm/Sigmobile}, event_place = {Krakow, Poland}, event_name = {Fourth ACM International Workshop on Mobility in the Evolving Internet Architecture (ACM MobiArch '09), Krakow, Poland}, event_date = {2009-06-22}, language = {en}, reviewed = {1}, author = {G{\"o}tz, Stefan and Heer, Tobias and Wehrle, Klaus} } @Inproceedings { 2009morchonpodckeyagreementwsn, title = {Lightweight Key Agreement and Digital Certificates for Wireles Sensor Networks}, year = {2009}, volume = {1}, pages = {326-327}, note = {Brief Announcement}, misc2 = {Print}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the 28th ACM SIGACT-SIGOPS Symposium on Principles of Distributed Computing (PODC 2009), Calgary}, event_place = {Calgary, CN}, event_name = {28th ACM SIGACT-SIGOPS Symposium on Principles of Distributed Computing (PODC 2009)}, language = {en}, ISBN = {978-963-9799-59-2}, DOI = {10.1145/1582716.1582791}, reviewed = {1}, author = {Garcia-Morchon, Oscar and Heer, Tobias and Tolhuizen, Ludo and Wehrle, Klaus} } @Inproceedings { 2009-icc-heer-middleboxes, title = {End-host Authentication and Authorization for Middleboxes based on a Cryptographic Namespace}, year = {2009}, volume = {1}, pages = {791-796}, abstract = {Today, middleboxes such as firewalls and network address translators have advanced beyond simple packet forwarding and address mapping. They also inspect and filter traffic, detect network intrusion, control access to network resources, and enforce different levels of quality of service. The cornerstones for these security-related network services are end-host authentication and authorization. Using a cryptographic namespace for end-hosts simplifies these tasks since it gives them an explicit and verifiable identity. The Host Identity Protocol (HIP) is a key-exchange protocol that introduces such a cryptographic namespace for secure end-to-end communication. Although HIP was designed with middleboxes in mind, these cannot securely use its namespace because the on-path identity verification is susceptible to replay attacks. Moreover, the binding between HIP as an authentication protocol and IPsec as payload transport is insufficient because on-path middleboxes cannot securely map payload packets to a HIP association. In this paper, we propose to prevent replays attack by treating packet-forwarding middleboxes as first-class citizens that directly interact with end-hosts. Also we propose a method for strengthening the binding between the HIP authentication process and its payload channel with hash-chain-based authorization tokens for IPsec. Our solution allows on-path middleboxes to efficiently leverage cryptographic end-host identities and integrates cleanly into existing protocol standards.}, tags = {mobile_access}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2009/2009-heer-icc-end-host-authentication.pdf}, misc2 = {Print}, publisher = {Piscataway, NJ, USA}, address = {Dresden, Germany}, booktitle = {Proceedings of the IEEE International Conference on Communications 2009 (ICC 2009), Dresden, Gemany}, organization = {IEEE}, event_place = {Dresden, Germany}, event_name = {IEEE International Conference on Communications 2009 (ICC 2009)}, language = {en}, ISBN = {978-1-4244-3435-0}, ISSN = {1938-1883}, DOI = {10.1109/ICC.2009.5198984}, reviewed = {1}, author = {Heer, Tobias and Hummen, Ren{\'e} and Komu, Miika and G{\"o}tz, Stefan and Wehrle, Klaus} } @Techreport { 2009-heer-draft-midauth, title = {End-Host Authentication for HIP Middleboxes (Version 2)}, year = {2009}, number = {draft-heer-hip-midauth-02}, abstract = {The Host Identity Protocol is a signaling protocol for secure communication, mobility, and multihoming. It achieves these properties by introducing a new cryptographic namespace. This document specifies an extension for HIP that enables middleboxes to unambiguously verify the identities of hosts that communicate across them. This extension enables middleboxes to verify the liveness and freshness of a HIP association and, thus, enables reliable and secure access control in middleboxes.}, note = {Work in progress}, institution = {Internet Engineering Task Force}, type = {Internet-Draft}, author = {Heer, Tobias and Komu, Miika and Wehrle, Klaus} } @Inproceedings { goetz2008adapt, title = {ADAPT: A Semantics-Oriented Protocol Architecture}, year = {2008}, month = {12}, day = {10}, volume = {5343/2008}, pages = {287-292}, abstract = {Although modularized protocol frameworks are flexible and adaptive to the increasing heterogeneity of networking environments, it remains a challenge to automatically compose communication stacks from protocol modules. The typical static classification into network layers or class hierarchies cannot appropriately accommodate cross-cutting changes such as overlay routing or cross-layer signaling. In this paper, we discuss how protocol composition can be driven by functionality and demand at runtime based on extensible semantic models of protocols and their execution environment. Such an approach allows to reason about the functionality and quality of automatically composed and adapted protocol compounds and it is open to existing and future protocols.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2008/2008-goetz-mobiarch-adapt.pdf}, misc2 = {Print}, editor = {Karin Anna Hummel and James P. G. Sterbenz}, publisher = {Springer-Verlag}, address = {Tiergartenstra{\ss}e 17, 69121 Heidelberg, Germany}, series = {Lecture Notes in Computer Science}, booktitle = {Proceedings of the 3rd International Workshop on Self-Organizing Systems, Vienna, Austria}, event_place = {Vienna, Austria}, event_name = {3rd International Workshop on Self-Organizing Systems (IWSOS)}, event_date = {2008-12-10}, language = {en}, ISBN = {978-3-540-92156-1}, DOI = {10.1007/978-3-540-92157-8\textbackslash_27}, reviewed = {1}, author = {G{\"o}tz, Stefan and Beckel, Christian and Heer, Tobias and Wehrle, Klaus} } @Inproceedings { heer-2008-conext-alpha, title = {ALPHA: an adaptive and lightweight protocol for hop-by-hop authentication}, year = {2008}, month = {12}, volume = {1}, pages = {23:1--23:12}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2008/2008-heer-conext-alpha.pdf}, misc2 = {Print}, publisher = {ACM}, address = {New York, NY, USA}, series = {CoNEXT '08}, booktitle = {Proceedings of the 2008 ACM CoNEXT Conference, Madrid, Spain}, event_place = {Madrid, Spain}, event_name = {ACM Conext 2008}, event_date = {December 2008}, language = {en}, ISBN = {978-1-60558-210-8}, DOI = {10.1145/1544012.1544035}, reviewed = {1}, author = {Heer, Tobias and G{\"o}tz, Stefan and Garcia-Morchon, Oscar and Wehrle, Klaus} } @Inproceedings { 2008-sensys-sasnauskas-kleenet, title = {Poster Abstract: KleeNet - Automatic Bug Hunting in Sensor Network Applications}, year = {2008}, month = {11}, pages = {425--426}, abstract = {We present KleeNet, a Klee based bug hunting tool for sensor network applications before deployment. KleeNet automatically tests code for all possible inputs, ensures memory safety, and integrates well into TinyOS based application development life cycle, making it easy for developers to test their applications.}, keywords = {bug finding, memory safety, tinyos, type safety}, tags = {kleenet}, url = {fileadmin/papers/2008/2008-11-Sasnauskas-SenSys08-KleeNet.pdf}, misc2 = {Print}, publisher = {ACM}, address = {New York, NY, USA}, booktitle = {Proceedings of the 6th ACM conference on Embedded network sensor systems (SenSys'08), Raleigh, NC, USA}, language = {en}, ISBN = {978-1-59593-990-6}, DOI = {http://doi.acm.org/10.1145/1460412.1460485}, reviewed = {1}, author = {Sasnauskas, Raimondas and Bitsch Link, J{\'o} Agila and Alizai, Muhammad Hamad and Wehrle, Klaus} } @Inproceedings { 200810ThieleSensors08RatPack, title = {Smart Sensors for Small Rodent Observation}, year = {2008}, month = {10}, day = {26}, pages = {709 -- 711}, abstract = {Working towards the observation of rats (and other small rodents) in the wild we have developed tools that will enable us to study their behavior using a wireless network of wearable sensor nodes. The space and weight constraints resulting from the size of the animals have led to simple but functional approaches for vocalization classification and position estimation. For the resulting data we have developed novel, delay-tolerant routing and collection strategies. These are expected to be used in a sparse, dynamic network resulting from various rats being tagged with our nodes and running around freely - an area that will eventually be too big to be covered solely by stationary data sinks. Furthermore, the system is designed to extract information on the social interactions between animals from the routing data. It currently works in an indoor environment and we are preparing it for tests in a controlled outdoor setup.}, tags = {RatPack}, url = {fileadmin/papers/2008/2008-10-Thiele-Sensors08-RatPack.pdf}, web_url2 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4716540}, misc2 = {Online}, publisher = {IEEE}, address = {New York City, NY, USA}, booktitle = {Proceedings of IEEE Sensors 2008, Lecce, Italy}, organization = {IEEE}, event_place = {Lecce, Italy}, event_name = {IEEE Sensors 2008}, event_date = {26-29 Oct. 2008}, language = {en}, ISBN = {978-1-4244-2580-8}, ISSN = {1930-0395}, DOI = {10.1109/ICSENS.2008.4716540}, reviewed = {1}, author = {Thiele, Johannes and Osechas, Okuary and Bitsch Link, J{\'o} Agila and Wehrle, Klaus} } @Conference { 200810riechelcncerco, title = {Range Queries and Load Balancing in a Hierarchically Structured P2P System}, year = {2008}, month = {10}, day = {14}, pages = {28-35}, abstract = {Structured Peer-to-Peer (P2P) systems are highly scalable, self-organizing, and support efficient lookups. Furthermore, Distributed Hash Tables (DHTs), due to their features, are used more and more for file-sharing and content distribution applications. However, a major weakness of traditional DHTs is the search for stored content, as data is assigned to nodes based on hash functions, and the very nature of hash tables allows only exact pattern matches. We present Cerco, a solution for the problem of range queries by using the principles of order-preserving DHTs and a hierarchically structured P2P approach. To guarantee an efficient routing and load balancing, Cerco uses a dynamic hierarchy of DHTs by creating subrings on demand and two explicit load balancing strategies. Our evaluation shows that Cerco is able to achieve the goals of supporting range queries, logarithmic-hop routing, and efficient load balancing.}, affiliation = {RWTH Aachen University - Distributed Systems Group}, url = {http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?isnumber=4664131\&arnumber=4664148\&count=180\&index=16}, web_url = {http://web.informatik.uni-bonn.de/IV/Mitarbeiter/matthew/Mirror_LCN2008_Website/www.ieeelcn.org/}, misc2 = {Print}, publisher = {IEEE Press}, booktitle = {Proceedings of 33rd Annual IEEE Conference on Local Computer Networks (LCN 2008)}, organization = {IEEE}, event_place = {Montreal, Canada}, event_name = {33rd Annual IEEE Conference on Local Computer Networks (LCN 2008)}, event_date = {14-17 Oct. 2008}, language = {en}, ISBN = {978-1-4244-2412-2}, DOI = {10.1109/LCN.2008.4664148}, reviewed = {1}, author = {Rieche, Simon and Vinh, Bui The and Wehrle, Klaus} } @Techreport { 2008-fgsn-sasnauskas-kleenet, title = {Bug Hunting in Sensor Network Applications}, year = {2008}, month = {9}, abstract = {Testing sensor network applications is an essential and a difficult task. Due to their distributed and faulty nature, severe resource constraints, unobservable interactions, and limited human interaction, sensor networks, make monitoring and debugging of applications strenuous and more challenging. In this paper we present KleeNet - a Klee based platform independent bug hunting tool for sensor network applications before deployment - which can automatically test applications for all possible inputs, and hence, ensures memory safety for TinyOS based applications. Upon finding a bug, KleeNet generates a concrete test case with real input values identifying a specific error path in a program. Additionally, we show that KleeNet integrates well into TinyOS application development life cycle with minimum manual effort, making it easy for developers to test their applications.}, tags = {kleenet}, url = {fileadmin/papers/2008/2008-09-Sasnauskas-FGSN08-BugHunting.pdf}, web_url = {ftp://ftp.inf.fu-berlin.de/pub/reports/tr-b-08-12.pdf}, misc2 = {Print}, publisher = {Freie Universit{\"a}t Berlin, Institute of Computer Science}, address = {Berlin, Germany}, booktitle = {Proceedings of the 7th GI/ITG Fachgespraech Wireless Sensor Networks, Berlin, Germany}, institution = {Chair of Communication and Distributed Systems (ComSys)}, language = {en}, reviewed = {1}, author = {Sasnauskas, Raimondas and Bitsch Link, J{\'o} Agila and Alizai, Muhammad Hamad and Wehrle, Klaus} } @Inproceedings { 200808OsechasEMBC08RatPack, title = {Ratpack: Wearable Sensor Networks for Animal Observation}, year = {2008}, month = {8}, day = {20}, pages = {538--541}, abstract = {The goal of our project is to describe the behavior of rats. For this purpose we are using wireless sensor networks, monitoring various quantities that yield important information to complement current knowledge on the behavioral repertoire of rats. So far, on the sensing and processing side we have developed innovative, minimalist approaches pointing in two directions: vocalization analysis and movement tracking. On the data collection and routing side we have adapted to the known burrowing habits of rats by developing new methods for synchronization and data aggregation under the paradigm of sporadic connectivity in a sparse, dynamic network.}, keywords = {Animals;Behavior, Animal;Clothing;Equipment Design;Equipment Failure Analysis;Miniaturization;Monitoring, Ambulatory;Rats;Reproducibility of Results;Sensitivity and Specificity;Transducers;}, tags = {ratpack}, url = {fileadmin/papers/2008/2008-08-Osechas-EMBC08-RatPack.pdf}, web_url2 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4649209}, misc2 = {Online}, publisher = {The Printing House}, address = {Stoughton, WI, USA}, booktitle = {Proceedings of the 30th Annual International IEEE Engineering in Medicine and Biology Conference, Vancouver, BC, Canada}, organization = {IEEE EMBS}, event_place = {Vancouver, BC, Canada}, event_name = {Engineering in Medicine and Biology Society, 2008. EMBS 2008. 30th Annual International Conference of the IEEE}, event_date = {20-25 Aug. 2008}, language = {en}, ISBN = {978-1-4244-1814-5}, ISSN = {1557-170X}, DOI = {10.1109/IEMBS.2008.4649209}, reviewed = {1}, author = {Osechas, Okuary and Thiele, Johannes and Bitsch Link, J{\'o} Agila and Wehrle, Klaus} } @Inproceedings { 200808BitschSIGCOMM08RatPack, title = {RatPack: Communication in a Sparse Dynamic Network}, year = {2008}, month = {8}, day = {17}, pages = {467--468}, abstract = {The goal of this pro ject is to investigate the behavior of wild living rats using sensor networks. The main challenge with respect to communication is the sparse and very dynamic network determined by the burrow dwelling behavior of rats, which makes delay tolerant data transmission schemes a necessity. The physical and computional restrictions in embedded devices make routing an interesting challenge for which we are currently developing new strategies.}, tags = {ratpack}, url = {fileadmin/papers/2008/2008-08-Bitsch-SIGCOMM08-RatPack.pdf}, web_url2 = {http://conferences.sigcomm.org/sigcomm/2008/posters.php}, misc = {http://www.worldcat.org/title/sigcomm-08-proceedings-of-the-2008-sigcomm-conference-and-co-located-workshops-nsdr08-wosn08-mobiarch08-netecon08-presto08-seattle-wa-usa-august-17-22-2008/oclc/300481768}, misc2 = {Online}, publisher = {ACM}, address = {New York City, NY, USA}, booktitle = {ACM SIGCOMM 2008 Poster Proceedings, Seattle, WA, USA}, organization = {ACM}, event_place = {Seattle, WA, USA}, event_name = {ACM SIGCOMM 2008}, event_date = {August 17-22, 2008}, language = {en}, ISBN = {978-1-60558-175-0}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Wehrle, Klaus and Osechas, Okuary and Thiele, Johannes} } @Techreport { 2008-fgsn-alizai-stle, title = {Challenges in Short-term Wireless Link Quality Estimation}, year = {2008}, month = {7}, pages = {27-30}, tags = {wld}, url = {fileadmin/papers/2008/2008-08-alizai-fgsn-stle.pdf}, web_url = {ftp://ftp.inf.fu-berlin.de/pub/reports/tr-b-08-12.pdf}, misc2 = {Print}, publisher = {Fachbereich Mathematik und Informatik}, address = {Berlin, Germany}, booktitle = {Proceedings of the 7th GI/ITG Workshop on Wireless Sensor Networks}, event_name = {FGSN 08}, event_date = {September 2010}, language = {en}, reviewed = {1}, author = {Alizai, Muhammad Hamad and Landsiedel, Olaf and Wehrle, Klaus and Becher, Alexander} } @Conference { 2008-heer-pisa-full, title = {Secure Wi-Fi Sharing at Global Scales}, year = {2008}, month = {6}, day = {16}, volume = {1}, pages = {1-7}, abstract = {The proliferation of broadband Internet connections has lead to an almost pervasive coverage of densely populated areas with private wireless access points. To leverage this coverage, sharing of access points as Internet uplinks among users has first become popular in communities of individuals and has recently been adopted as a business model by several companies. However, existing implementations and proposals suffer from the security risks of directly providing Internet access to strangers. In this paper, we present the P2P Wi-Fi Internet Sharing Architecture PISA, which eliminates these risks by introducing secure tunneling, cryptographic identities, and certificates as primary security concepts. Thus, PISA offers nomadic users the same security that they expect from a wired Internet connection at home. Based on its three fundamental mechanisms, PISA achieves a flexibility which opens significant advantages over existing systems. They include user mobility, anonymity, service levels with different performance and availability characteristics, and different revenue models for operators. With this combination of key features, PISA forms an essential basis for global, seamless, and secure Wi-Fi sharing for large communities.}, tags = {mobile_access}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2008/2008-heer-ict-secure-wifi.pdf}, misc2 = {Print}, publisher = {IEEE}, address = {Washington, DC, USA}, booktitle = {Proc. of 15th International Conference on Telecommunication (ICT), St. Petersburg, Russian Federation}, event_place = {St. Petersburg, Russian Federation}, event_name = {15th International Conference on Telecommunication (ICT)}, event_date = {16-19 June 2008}, language = {en}, ISBN = {978-1-4244-2035-3}, reviewed = {1}, author = {Heer, Tobias and G{\"o}tz, Stefan and Weingaertner, Elias and Wehrle, Klaus} } @Inproceedings { 2008-becher-hotemnets-linkestimation, title = {Towards Short-Term Wireless Link Quality Estimation}, year = {2008}, month = {6}, day = {3}, pages = {1--5}, abstract = {Commonly, routing in sensor networks is limited to longterm stable links. Unstable links, although often promising to be of large routing progress, are not considered for packet forwarding as link estimators typically cannot handle their dynamics. In this paper we introduce short-term link estimation to capture link dynamics at a high resolution in time and to identify when these render a link temporarily reliable or unreliable. We identify such dynamics based on packet overhearing, predict short-term availability and unavailability, and adapt neighbor tables, thereby enlarging the set of links useable by any routing algorithm. Additionally, we show that short-term link estimation integrates seamlessly into today's sensor network link estimators and routing protocols.}, tags = {wld}, url = {fileadmin/papers/2008/2008-becher-hotemnets-linkestimation.pdf}, misc2 = {Online}, publisher = {ACM Press}, address = {New York, NY, USA}, booktitle = {Proceedings of Fifth Workshop on Embedded Networked Sensors (Hot EmNets'08), Charlottesville, VA, USA}, event_place = {Chalottesville, USA}, event_name = {Fifth Workshop on Embedded Networked Sensors (Hot EmNets'08)}, event_date = {June 2-3, 2008}, language = {en}, ISBN = {978-1-60558-209-2}, reviewed = {1}, author = {Becher, Alexander and Landsiedel, Olaf and Kunz, Georg and Wehrle, Klaus} } @Conference { 200803riechemmvecluster, title = {Clustering Players for Load Balancing in Virtual Worlds}, year = {2008}, month = {3}, day = {18}, pages = {9-13}, abstract = {Massively Multiplayer Online Games (MMOGs) have become increasingly popular in the last years. So far the distribution of load, caused by the players in these games, is not distributed dynamically. After the launch of a new game, the introduction of new content, during special ingame events, or also during normal operations, players tend to concentrate in certain regions of the game worlds and cause overload conditions. Therefore we propose the use of structured P2P technology for the server infrastructure of the MMOGs to improve the reliability and scalability. Previous work segmented the game work into rectangular areas; however this approach often split a group of players to different servers, causing additional overhead. This work presents a cluster-based Peer-to-Peer approach, which can be used for load balancing in MMOGs or in other virtual worlds. The system is able to dynamically adapt to the current state of the game and handle uneven distributions of the players in the game world. We show through simulation, also with traces from real online games, that the cluster-based approach performs better than the previous P2P-based systems, which split the world in rectangular areas.}, affiliation = {RWTH Aachen University - Distributed Systems Group}, url = {http://www.pap.vs.uni-due.de/MMVE08/papers/proceedings.pdf}, web_url = {http://www.pap.vs.uni-due.de/MMVE08/}, misc2 = {Online}, editor = {Gregor Schiele, Daniel Weiskopf, Ben Leong, Shun-Yun Hu}, booktitle = {Proceedings of 1st International Workshop on Massively Multiuser Virtual Environments at IEEE Virtual Reality 2008 (MMVE 2008)}, event_place = {Reno, Nevada, USA}, event_name = {1st International Workshop on Massively Multiuser Virtual Environments at IEEE Virtual Reality 2008 (MMVE 2008)}, event_date = {March 8th, 2008}, language = {en}, reviewed = {1}, author = {Rieche, Simon and Wehrle, Klaus and Fouquet, Marc and Niedermayer, Heiko and Teifel, Timo and Carle, Georg} } @Article { 200808WeingaertnerSIGMETRICSPERSyncNetWorkEmulation, title = {Synchronized network emulation: matching prototypes with complex simulations}, journal = {SIGMETRICS Performance Evaluation Review}, year = {2008}, volume = {36}, number = {2}, pages = {58-63}, abstract = {Network emulation, in which real systems interact with a network simulation, is a common evaluation method in computer networking research. Until now, the simulation in charge of representing the network has been required to be real-time capable, as otherwise a time drift between the simulation and the real network devices may occur and corrupt the results. In this paper, we present our work on synchronized network emulation. By adding a central synchronization entity and by virtualizing real systems for means of control, we can build-up network emulations which contain both unmodified x86 systems and network simulations of any complexity.}, note = {This is a revised version of a paper originally presented at the ACM HotMetrics 2008 workshop.}, misc2 = {print}, language = {en}, ISSN = {0163-5999}, DOI = {10.1145/1453175.1453185}, reviewed = {1}, author = {Weingaertner, Elias and Schmidt, Florian and Heer, Tobias and Wehrle, Klaus} } @Article { 200812riecheIJAMCcluster, title = {Clustering Players for Load Balancing in Virtual Worlds}, journal = {International Journal of Advanced Media and Communication (IJAMC)}, year = {2008}, volume = {2}, number = {4}, pages = {351-363}, abstract = {In current Massively Multiplayer Online Games (MMOGs) the distribution of load is not distributed dynamically. But players tend to concentrate in certain regions of the game world and cause overload conditions. Therefore we propose the use of structured Peer-to-Peer technology for the server infrastructure of the MMOGs to improve the reliability and scalability. Previous work segmented the game work into rectangular areas but often split a group of players to different servers. This work presents a cluster-based P2P approach, which is able to dynamically adapt to the current state of the game and handle uneven distributions of players.Weshow through simulation, also with traces from real online games, that the cluster-based approach performs better than the previous P2P-based system.}, affiliation = {RWTH Aachen University - Distributed Systems Group}, web_url = {http://www.inderscience.com/browse/index.php?journalID=67}, misc2 = {print}, language = {en}, ISSN = {1462-4613}, reviewed = {1}, author = {Rieche, Simon and Wehrle, Klaus and Fouquet, Marc and Niedermayer, Heiko and Teifel, Timo and Carle, Georg} } @Inproceedings { 200804landsiedelIPSN08TimingMatters, title = {When Timing Matters: Enabling Time Accurate \& Scalable Simulation of Sensor Network Applications}, year = {2008}, pages = {344-354}, abstract = {The rising complexity of data processing algorithms in sensor networks combined with their severely limited computing power necessitates an in-depth understanding of their temporal behavior. However, today only cycle accurate emulation and test-beds provide a detailed and accurate insight into the temporal behavior of sensor networks. In this paper we introduce fine grained, automated instrumentation of simulation models with cycle counts derived from sensor nodes and application binaries to provide detailed timing information. The presented approach bridges the gap between scalable but abstracting simulation and cycle accurate emulation for sensor network evaluation. By mapping device-specific code with simulation models, we can derive the time and duration a certain code line takes to get executed on a sensor node. Hence, eliminating the need to use expensive instruction-level emulators with limited speed and restricted scalability. Furthermore, the proposed design is not bound to a specific hardware platform, a major advantage compared to existing emulators. Our evaluation shows that the proposed technique achieves a timing accuracy of 99\% compared to emulation while adding only a small overhead. Concluding, it combines essential properties like accuracy, speed and scalability on a single simulation platform.}, url = {fileadmin/papers/2008/2008-04-IPSN-2008-landsiedel-Timing-Matters.pdf}, misc2 = {Print}, publisher = {IEEE Computer Society}, address = {Washington, DC, USA}, booktitle = {Proceedings of the 7th ACM International Conference on Information Processing in Sensor Networks (IPSN 2008), St. Louis, MO, USA}, language = {en}, ISBN = {978-0-7695-3157-1}, reviewed = {1}, author = {Landsiedel, Olaf and Alizai, Muhammad Hamad and Wehrle, Klaus} } @Techreport { 200807VOMLEHNAIB200816NetworkSimulatorComparison, title = {Comparing recent network simulators: A performance evaluation study}, journal = {Aachener Informatik Berichte}, year = {2008}, volume = {2008-16}, number = {AIB 2008-16}, pages = {1-28}, abstract = {Ranging from the development of new protocols to validating analytical performance metrics, network simulation is the most prevalent methodology in the field of computer network research. While the well known ns-2 toolkit has established itself as the quasi standard for network simulation, the successors are on their way. In this paper, we first survey recent contributions in the field of network simulation tools as well as related aspects such as parallel network simulation. Moreover, we present preliminary results which compare the resource demands for ns-3, JiST, SimPy and OMNeT++ by implementing the identical simulation scenario in all these network simulation tools.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2008/AIB-2008-16.pdf}, misc2 = {Online}, address = {Ahornstr. 55, Aachen, Germany}, institution = {RWTH Aachen University}, type = {Technical Report}, ISSN = {0935-3232}, author = {vom Lehn, Hendrik and Weingaertner, Elias and Wehrle, Klaus} } @Techreport { 2008-heer-draft-midauth, title = {End-Host Authentication for HIP Middleboxes (Version 1)}, year = {2008}, number = {draft-heer-hip-midauth-01}, abstract = {The Host Identity Protocol is a signaling protocol for secure communication, mobility, and multihoming. It achieves these properties by introducing a new cryptographic namespace. This document specifies an extension for HIP that enables middleboxes to unambiguously verify the identities of hosts that communicate across them. This extension enables middleboxes to verify the liveness and freshness of a HIP association and, thus, enables reliable and secure access control in middleboxes.}, note = {Work in progress}, institution = {Internet Engineering Task Force}, type = {Internet-Draft}, author = {Heer, Tobias and Komu, Miika and Wehrle, Klaus} } @Inproceedings { 2007-heer-pisa, title = {PISA: P2P Wi-Fi Internet Sharing Architecture}, journal = {Seventh IEEE International Conference on Peer-to-Peer Computing, P2P 2007}, year = {2007}, month = {9}, day = {2}, volume = {1}, pages = {251-252}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2007/2007-p2p-heer-pisa.pdf}, misc2 = {Print}, publisher = {IEEE}, address = {Washington, DC, USA}, booktitle = {Proceedings of the Seventh IEEE International Conference on Peer-to-Peer Computing, 2007. P2P 2007, Galway, Ireland.}, event_place = {Galway, Ireland}, event_name = {Seventh IEEE International Conference on Peer-to-Peer Computing, 2007. P2P 2007.}, language = {en}, ISBN = {978-0-7695-2986-8}, DOI = {10.1109/P2P.2007.12}, reviewed = {1}, author = {Heer, Tobias and Li, Shaohui and Wehrle, Klaus} } @Inproceedings { 200707BitschSNFGRatPack, title = {Ratpack: Using Sensor Networks for Animal Observation}, year = {2007}, month = {7}, day = {16}, volume = {2007-11}, pages = {95 -- 97}, abstract = {The goal of this project is to describe the behaviour of rats. To study this behaviour, we will resort to the use of wireless sensor networks, monitoring various quantities that yield important information to complement current knowledge on the behavioural repertoire of rats. The challenges we face include data acquisition and processing on the one hand, as rat-borne sensor nodes will need to be small enough not to interfere with the rats' own activities, thus limiting the available memory and processing capabilities. Additionally, rats spend a significant amount of time underground, making data transmission and routing a very interesting challenge, for which we are currently developing novel strategies.}, tags = {RatPack}, url = {fileadmin/papers/2007/2007-07-Bitsch-SNFG-RatPack.pdf}, misc2 = {Print}, editor = {Klaus Wehrle}, publisher = {RWTH Aachen University}, address = {Aachen, Germany}, series = {AIB}, booktitle = {6th GI/ITG KuVS Fachgespr{\"a}ch ''Wireless Sensor Networks'', Aachen, Germany}, organization = {GI/ITG Fachgruppe ''Kommunikation und Verteilte Systeme''}, event_place = {Aachen, Germany}, event_name = {6th GI/ITG KuVS Fachgespr{\"a}ch ''Wireless Sensor Networks''}, event_date = {July 16-17, 2007}, language = {en}, ISSN = {0935-3232}, reviewed = {1}, author = {Bitsch Link, J{\'o} Agila and Wehrle, Klaus and Osechas, Okuary and Thiele, Johannes and Mallot, Hanspeter} } @Techreport { 2007-fgsn-alizai-timetossim, title = {Accurate Timing in Sensor Network Simulations}, year = {2007}, month = {7}, url = {fileadmin/papers/2008/2007-07-fgsn-alizai-accurate-timing.pdf}, web_url = {https://www.ds-group.info/events/fgsn07/fgsn07proc.pdf}, misc2 = {Print}, publisher = {RWTH Aachen}, address = {Aachen, Germany}, booktitle = {Proceedings of the 6th GI/ITG KuVS Workshop on Wireless Sensor Networks (FGSN 07)}, institution = {RWTH Aachen}, event_place = {Aachen, Germany}, event_name = {FGSN 07}, event_date = {July 2007}, language = {en}, author = {Alizai, Muhammad Hamad and Landsiedel, Olaf and Wehrle, Klaus} } @Conference { 200701riecheccncmmog, title = {Peer-to-Peer-based Infrastructure Support for Massively Multiplayer Online Games}, year = {2007}, month = {1}, day = {11}, pages = {763-767}, abstract = {Online games are an interesting challenge and chance for the future development of the Peer-to-Peer paradigm. Massively multiplayer online games (MMOGs) are becoming increasingly popular today. However, even high-budget titles like World of Warcraft that have gone through extensive betatesting suffer from downtimes because of hard- and software problems. Our approach is to use structured P2P technology for the server infrastructure of MMOGs to improve their reliability and scalability. Such P2P networks are also able to adapt to the current state of the game and handle uneven distributions of the players in the game world. Another feature of our approach is being able to add supplementary servers at runtime. Our system allows using off-the-shelf PCs as infrastructure peers for participation in different game worlds as needed. Due to the nature of the Economy of Scale the same number of hosts will provide a better service than dedicated servers for each game world.}, affiliation = {RWTH Aachen University - Distributed Systems Group}, url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=4199088\&arnumber=4199243\&count=254\&index=154}, web_url = {http://www.ieee-ccnc.org/2007/}, misc2 = {Print}, publisher = {IEEE Press}, booktitle = {Proceedings of 4th Annual IEEE Consumer Communications and Networking Conference (CCNC 2007)}, organization = {IEEE}, event_place = {Las Vegas, Nevada, USA}, event_name = {4th Annual IEEE Consumer Communications and Networking Conference (CCNC 2007)}, event_date = {11-13 January 2007}, language = {en}, ISBN = {1-4244-0667-6}, DOI = {10.1109/CCNC.2007.155}, reviewed = {1}, author = {Rieche, Simon and Wehrle, Klaus and Fouquet, Marc and Niedermayer, Heiko and Petrak, Leo and Carle, Georg} } @Article { 200707ITp2p, title = {Peer-to-Peer Systems (Editorial)}, journal = {Special Issue on Peer-to-Peer of the it - Information Technology Journal}, year = {2007}, volume = {49}, number = {ISSN 0935-3232}, note = {http://it-Information-Technology.de}, author = {Steinmetz, Ralf and Wehrle, Klaus and Liebau, Nicolas} } @Article { LandsiedelEtAl2007, title = {MHT: A Mobility-Aware Distributed Hash Table}, journal = {Special Issue on Peer-to-Peer of the it - Information Technology Journal}, year = {2007}, volume = {49}, number = {5}, pages = {298-303}, abstract = {Mobile ad-hoc networks and distributed hash tables share key characteristics in terms of self organization, decentralization, redundancy requirements, and limited infrastructure. However, node mobility and the continually changing physical topology pose a special challenge to scalability and the design of a DHT for mobile ad-hoc networks. In this paper, we show that with some local knowledge we can build a scalable and mobile structured peer-to-peer network, called Mobile Hash Table (MHT). Furthermore, we discuss practical challenges such as Churn, load balacing and security of the Mobile Hash Table. A special focus is put on the differences and new challenges that the use of a DHT in a mobile environment poses.}, note = {http://it-Information-Technology.de}, misc2 = {Print}, publisher = {Oldenbourg Verlag}, address = {Munich, Germany}, language = {en}, ISSN = {1611-2776}, reviewed = {1}, author = {Landsiedel, Olaf and Heer, Tobias and Wehrle, Klaus} } @Conference { 200711Globecom2007Landsiedelmultipathonionrouting, title = {Dynamic Multipath Onion Routing in Anonymous Peer-To-Peer Overlay Networks}, year = {2007}, abstract = {Although recent years provided many protocols for anonymous routing in overlay networks, they commonly rely on the same communication paradigm: Onion Routing. In Onion Routing a static tunnel through an overlay network is build via layered encryption. All traffic exchanged by its end points is relayed through this tunnel.In contrast, this paper introduces dynamic multipath Onion Routing to extend the static Onion Routing paradigm. This approach allows each packet exchanged between two end points to travel along a different path. To provide anonymity the first half of this path is selected by the sender and the second half by the receiver of the packet. The results are manifold: First, dynamic multipath Onion Routing increases the resilience against threats, especially pattern and timing based analysis attacks. Second, the dynamic paths reduce the impact of misbehaving and overloaded relays. Finally, inspired by Internet routing, the forwarding nodes do not need to maintain any state about ongoing flows and so reduce the complexity of the router. In this paper, we describe the design of our dynamic Multipath Onion Router (MORE) for peer-to-peer overlay networks, and evaluate its performance. Furthermore, we integrate address virtualization to abstract from Internet addresses and provide transparent support for IP applications. Thus, no application-level gateways, proxies or modifications of applications are required to sanitize protocols from network level information. Acting as an IP-datagram service, our scheme provides a substrate for anonymous communication to a wide range of applications using TCP and UDP.}, booktitle = {IEEE Global Communication Conference (GlobeCom), Washington D.C.}, author = {Landsiedel, Olaf and Pimenidis, Alexis and Wehrle, Klaus and Niedermayer, Heiko and Carle, Georg} } @Inproceedings { 200706juriFGSN07platform, title = {Simulation von plattformunabh{\"a}ngigen TinyOS-Applikationen mit ns-2}, year = {2007}, address = {Aachen, Germany}, booktitle = {Proceedings of 6th GI/ITG KuVS Fachgespr{\"a}ch ''Wireless Sensor Networks''}, author = {Saragazki, Juri and Landsiedel, Olaf and Wehrle, Klaus} } @Inproceedings { 200707SchmidtFGSN07composition, title = {Smart Composition of Sensor Network Applications}, year = {2007}, address = {Aachen, Germany}, booktitle = {Proceedings of 6th GI/ITG KuVS Fachgespr{\"a}ch ''Wireless Sensor Networks'', Aachen}, author = {Schmitz, Stefan and Landsiedel, Olaf and Wehrle, Klaus} } @Inproceedings { GarciaMorchonEtAl2007, title = {Cooperative Security in Distributed Sensor Networks}, year = {2007}, volume = {1}, misc2 = {Print}, publisher = {IEEE}, address = {Washington, DC, USA}, series = {1}, booktitle = {Proceedings of the third International Conference on Collaborative Computing: Networking, Applications and Worksharing, CollaborateCom 2007}, organization = {IEEE}, event_name = {CollaborateCom}, language = {en}, ISBN = {978-1-4244-1318-8}, reviewed = {1}, author = {Garcia-Morchon, Oscar and Baldus, Heribert and Heer, Tobias and Wehrle, Klaus} } @Techreport { 200707SNFGProceedings, title = {6. Fachgespr{\"a}ch Sensornetzwerke der GI/ITG Fachgruppe ''Kommunikation und Verteilte Systeme''}, year = {2007}, number = {AIB 2007-11}, address = {Aachen, Germany}, institution = {Distributed Systems Group, RWTH Aachen University}, type = {Proceedings of Workshop}, author = {Wehrle, Klaus} } @Conference { rieche2006cerco, title = {Cerco: Supporting Range Queries with a Hierarchically Structured Peer-to-Peer System}, year = {2006}, month = {11}, day = {14}, pages = {509-510}, abstract = {Structured Peer-to-Peer systems are designed for a highly scalable, self organizing, and efficient lookup for data. The key space of the so-called Distributed Hash Tables (DHTs) is partitioned and each partition with its keys and values is assigned to a node in the DHT. For data retrieval however, the very nature of hash tables allows only exact pattern matches. We propose Cerco, a simple solution for the problem of range queries by employing a hierarchically structured P2P approach based on the principles of Distributed Hash Tables. We show that a dynamic hierarchy of DHTs with on-demand classification of items can positively influence the response time of queries while maintaining lookup correctness.}, affiliation = {RWTH Aachen University - Distributed Systems Group}, url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=4116490\&arnumber=4116594\&count=192\&index=90}, web_url = {http://web.archive.org/web/20061008091738/http://www.ieeelcn.org/}, misc2 = {Print}, publisher = {IEEE Press}, booktitle = {Proceedings of 31st IEEE Conference on Local Computer Networks (LCN 2006)}, organization = {IEEE}, event_place = {Tampa, Florida, USA}, event_name = {31st IEEE Conference on Local Computer Networks (LCN 2006)}, event_date = {14-16 November 2006}, language = {en}, ISBN = {1-4244-0418-5}, DOI = {10.1109/LCN.2006.322147}, reviewed = {1}, author = {Rieche, Simon and Wehrle, Klaus and Petrak, Leo and Wrzodek, Clemens} } @Techreport { 200608riechetrmmog, title = {Peer-to-Peer-based Infrastructure Support for Massively Multiplayer Online Games}, year = {2006}, month = {8}, number = {WSI-2006-04}, abstract = {Online games are an interesting challenge and chance for the future development of the Peer-to-Peer paradigm. Massively multiplayer online games (MMOGs) are becoming increasingly popular today. However, even high-budget titles like World of Warcraft that have gone through extensive beta-testing suffer from downtimes because of hard- and software problems. Our approach is to use structured P2P technology for the server infrastructure of MMOGs to improve their reliability and scalability. Such P2P networks are also able to adapt to the current state of the game and handle uneven distributions of the players in the game world. Another feature of our approach is being able to add supplementary servers at runtime. Our system allows using off-the-shelf PCs as infrastructure peers for participation in different game worlds as needed. Due to the nature of the Economy of Scale the same number of hosts will provide a better service than dedicated servers for each game world.}, affiliation = {RWTH Aachen University - Distributed Systems Group}, url = {http://www.rieche.net/pdf/wsi-2006-04.pdf}, misc2 = {Online}, address = {T{\"u}bingen, Germany}, institution = {Wilhelm-Schickard-Institute for Computer Science, University of T{\"u}bingen}, type = {Technical Report}, language = {en}, author = {Rieche, Simon and Fouquet, Marc and Niedermayer, Heiko and Petrak, Leo and Wehrle, Klaus and Carle, Georg} } @Inproceedings { 200606LandsiedelRatWatch, title = {Rat Watch: Using Sensor Networks for Animal Observation}, year = {2006}, month = {6}, day = {19}, volume = {1}, pages = {1--2}, abstract = {In an attempt to employ sensor network technology for animal observation, in particular of wild rats, we identified several restrictive shortcomings in existing sensor network research, which we discuss in this paper.}, note = {(Poster and Abstract)}, tags = {RatPack}, url = {fileadmin/papers/2006/2006-06-Landsiedel-RatWatch.pdf}, web_url2 = {http://www.sics.se/realwsn06/program.html}, misc2 = {Online}, editor = {Pedro Jos{\'e} Marron and Thiemo Voigt}, publisher = {SICS}, address = {Uppsala, Sweden}, booktitle = {ACM Workshop on Real-World Wireless Sensor Networks (RealWSN) in conjunction with ACM MobiSys, Uppsala, Sweden}, organization = {ACM}, event_place = {Uppsala, Sweden}, event_name = {ACM Workshop on Real-World Wireless Sensor Networks, REALWSN'06}, event_date = {June 19, 2006}, language = {en}, reviewed = {1}, author = {Landsiedel, Olaf and Bitsch Link, J{\'o} Agila and Wehrle, Klaus and Thiele, Johannes and Mallot, Hanspeter} } @Inproceedings { 2006-heer-percomws-adapt-dht, title = {Adapting Distributed Hash Tables for Mobile Ad Hoc Networks}, year = {2006}, month = {3}, day = {16}, volume = {1}, pages = {1-6}, url = {http://www.comsys.rwth-aachen.de/fileadmin/papers/2005/2006-heer-percomws-dht-adhoc.pdf}, misc2 = {Print}, publisher = {IEEE}, address = {Washington, DC, USA}, booktitle = {In Proceedings of 3. IEEE International Workshop on Mobile Peer-to-Peer Computing (MP2P'06), Pisa, Italy.}, event_place = {Pisa, Italy}, event_name = {IEEE International Workshop on Mobile Peer-to-Peer Computing}, event_date = {March 2006}, language = {en}, ISBN = {0-7695-2520-2}, DOI = {10.1109/PERCOMW.2006.16}, reviewed = {1}, author = {Heer, Tobias and G{\"o}tz, Stefan and Rieche, Simon and Wehrle, Klaus} } @Poster { rieche2006poster, title = {Peer-to-Peer-based Infrastructure Support for Massively Multiplayer Online Games}, year = {2006}, month = {3}, abstract = {Massively multiplayer online games (MMOGs) are becoming increasingly popular today. However, even high-budget titles like World of Warcraft that have gone through extensive beta-testing suffer from downtimes because of hard- and software problems and lags on overloaded servers. Our approach is to use structured P2P technology for the server infrastructure of massively multiplayer online games to improve reliability and scalability of these applications. Structured P2P networks are able to adapt to the current state of the game world and handle uneven distributions of the players. For load balancing, we propose algorithms based on the virtual server concept.}, affiliation = {RWTH Aachen University - Distributed Systems Group}, web_url = {http://www.dagstuhl.de/de/programm/kalender/semhp/?semnr=06131}, misc2 = {Print}, editor = {Dagstuhl Seminar 06131 ''Peer-to-Peer Systems and Applications''}, publisher = {Dagstuhl}, organization = {Dagstuhl Seminar 06131}, language = {en}, author = {Rieche, Simon and Wehrle, Klaus} } @Inproceedings { 200602LandsiedelEWSNModularSN, title = {Modular Communication Protocols for Sensor Networks}, year = {2006}, month = {2}, day = {13}, volume = {507}, pages = {22 -- 23}, abstract = {In this paper we present our ongoing work on modular communication protocols for sensor networks. Their modularity allows recomposing a protocol dynamically at runtime and adapting it to the changing needs of a sensor network. Compared to existing work, our componentization is fine grained and protocol independent, enabling a high degree of component reusability.}, note = {(Poster and Abstract)}, url = {fileadmin/papers/2006/2006-02-Landsiedel-EWSN-ModularSN.pdf}, web_url2 = {ftp://ftp.inf.ethz.ch/pub/publications/tech-reports/5xx/507.pdf}, misc = {Technical Report}, misc2 = {Online}, editor = {Kay R{\"o}mer and Holger Karl and Friedemann Matterns}, publisher = {Department of Computer Science, ETH Zurich}, address = {Zurich, Switzerland}, series = {Technical Report ETH Zurich / Dept. of Computer Science}, booktitle = {European Workshop on Wireless Sensor Networks (EWSN 2006), Zurich Switzerland}, organization = {EWSN}, event_place = {Zurich, Switzerland}, event_name = {3rd European Workshop on Wireless Sensor Networks (EWSN 2006)}, event_date = {February 13-15, 2006}, language = {en}, reviewed = {1}, author = {Landsiedel, Olaf and Bitsch Link, J{\'o} Agila and Denkinger, Katharina and Wehrle, Klaus} } @Conference { 200607landsiedelfgsnmodular, title = {When Modularity Matters}, year = {2006}, abstract = {In an attempt to employ sensor network technology for animal observation, in particular of wild rats, we identified several restrictive shortcomings in existing sensor network research. In this paper, we present modular and flexible communication protocols as an efficient substrate to address these shortcomings. Their modularity allows recomposing a protocol dynamically at runtime and adapting it to the changing needs of a deployed sensor network.}, booktitle = {5th GI/ITG KuVS Fachgespr{\"a}ch ''Wireless Sensor Networks'', Stuttgart, Germany}, author = {Landsiedel, Olaf and Wehrle, Klaus} } @Conference { 200607landsiedelngimodels, title = {Towards flexible and modular simulation models}, year = {2006}, abstract = {In this talk we discuss the increasing need for flexible and modular simulation models and our ongoing work in this area. Although a huge number of simulation models are available today, these models do not interoperate and cannot be easily combined to form a full protocol simulation stack.}, booktitle = {Visions of Future Generation Networks, W{\"u}rzburg, Germany}, author = {Landsiedel, Olaf and Petrak, Leo and Wehrle, Klaus} } @Inproceedings { 200605NSDIOCALA, title = {OCALA: An Architecture for Supporting Legacy Applications over Overlays}, year = {2006}, abstract = {In order for overlays and new network architectures to gain real user acceptance, users should be able to leverage overlay functionality without any modifications to their applications and operating systems. We present our design, implementation, and experience with OCALA, an overlay convergence architecture that achieves this goal. OCALA interposes an overlay convergence layer below the transport layer. This layer is composed of an overlay independent sub-layer that interfaces with legacy applications, and an overlay dependent sub-layer that delivers packets to the overlay. Unlike previous efforts, OCALA enables: (a) simultaneous access to multiple overlays (b) communication between hosts in different overlays (c) communication between overlay hosts and legacy hosts (d) extensibility, allowing researchers to incorporate their overlays into OCALA. We currently support five overlays, i3 [32], RON [1], HIP [19], DOA [39] and OverDoSe [31] on Linux, Windows XP/2000 and Mac OS X. We (and a few other research groups and end-users) have used OCALA for over a year with many legacy applications ranging from web browsers to remote desktop applications.}, note = {San Jose, California}, publisher = {USENIX / ACM}, booktitle = {Proceedings of 3rd ACM Sigcomm/ACM Sigops Symposium on Networked Systems Design and Implementation (NSDI 2006)}, organization = {ACM}, author = {Joseph, Dilip A and Lakshminarayanan, Karthik and Stoica, Ion and Wehrle, Klaus} } @Inproceedings { 200608landsiedelp2p06scalablemobility, title = {Towards Scalable Mobility in Distributed Hash Tables}, year = {2006}, pages = {203-209}, abstract = {For the use in the Internet domain, distributed hash tables (DHTs) have proven to be an efficient and scalable approach to distributed content storage and access. In this paper, we explore how DHTs and mobile ad-hoc networks (MANETs) fit together. We argue that both share key characteristics in terms of self organization, decentralization, redundancy requirements, and limited infrastructure. However, node mobility and the continually changing physical topology pose a special challenge to scalability and the design of a DHT for mobile ad-hoc networks. In this paper, we show that with some local knowledge we can build a scalable and mobile structured peer-to-peer network, called Mobile Hash Table (MHT). Furthermore, we argue that with little global knowledge, such as a map of the city or whatever area the nodes move in, one can even further improve the scalability and reduce DHT maintenance overhead significantly, allowing MHT to scale up to several ten thousands of nodes.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2006/2006-landsiedel-p2p-mobility.pdf}, misc2 = {print}, publisher = {IEEE}, address = {Washington, DC, USA}, howpublished = {print}, booktitle = {Proceedings of the Sixth IEEE International Conference on Peer-to-Peer Computing (P2P'06), Cambridge, UK}, organization = {IEEE}, event_place = {Cambridge, UK}, event_name = {Sixth IEEE International Conference on Peer-to-Peer Computing (P2P'06)}, event_date = {2006-09-06}, language = {en}, ISBN = {0-7695-2679-9}, DOI = {10.1109/P2P.2006.46}, reviewed = {1}, author = {Landsiedel, Olaf and G{\"o}tz, Stefan and Wehrle, Klaus} } @Inproceedings { landsiedel2005anonymous, title = {Anonymous IP-Services via Overlay Routing}, year = {2005}, month = {3}, abstract = {Although research provides anonymous Internet communication schemes, anonymous IP-services received only limited attention. In this paper we present SARA (Anonymous Overlay Routing Providing Sender And Receiver Anonymity), which enables sender, receiver and relationship anonymity using layered encryption and distributed traffic mixes, similar to a Chaumian Mix. Via IP-datagram service and address virtualization it is fully transparent to applications. Organized as structured Peer-To-Peer system, SARA is highly scalable and fault tolerant. In SARA each communication partner randomly selects a number of nodes from the overlay and concatenates them to an anonymous communication path. The sender selects the head of the path, the receiver builds the tail and publishes this information in the overlay network using an anonymous ID. Via this ID the sender retrieves the tail nodes of the path and concatenates both path section. Layered encryption hides the identities of the sender, receiver and the intermediate nodes.}, booktitle = {5. W{\"u}rzburger ''Workshop IP Netzmanagement, IP Netzplanung und Optimierung''}, event_place = {W{\"u}rzburg, Germany}, event_name = {5. W{\"u}rzburger ''Workshop IP Netzmanagement, IP Netzplanung und Optimierung''}, event_date = {March 2005}, author = {Landsiedel, Olaf and Rieche, Simon and Niedermayer, Heiko and Wehrle, Klaus and Carle, Georg} } @Inproceedings { petrak2005dienstguete, title = {Dienstg{\"u}te in strukturierten hierarchischen Overlay Netzwerken}, year = {2005}, month = {3}, booktitle = {Proceedings of Workshop Peer-to-Peer-Systems and -Applications, KiVS 2005}, event_place = {Kaiserslautern, Germany}, event_name = {Workshop Peer-to-Peer-Systems and -Applications, KiVS 2005}, event_date = {March 2005}, author = {Petrak, Leo and Rieche, Simon and Wehrle, Klaus} } @Inproceedings { niedermayer2005distribution, title = {On the Distribution of Nodes in Distributed Hash Tables}, year = {2005}, month = {3}, booktitle = {Proceedings of Workshop Peer-to-Peer-Systems and -Applications, KiVS 2005}, event_place = {Kaiserslautern, Germany}, event_name = {Workshop Peer-to-Peer-Systems and -Applications, KiVS 2005}, event_date = {March 2005}, author = {Niedermayer, Heiko and Rieche, Simon and Wehrle, Klaus and Carle, Georg} } @Inproceedings { 200507riecheipgames, title = {On the Use of Structured Peer-to-Peer Systems for Online Gaming}, year = {2005}, month = {3}, abstract = {Massively multiplayer games are becoming increasingly popular today. However, even high-budget titles suffer from downtimes because of hard- and software problems. Our approach is to use structured Peer-to-Peer technology for the server infrastructure of massively multiplayer online games, which improves reliability and scalability of these applications.}, booktitle = {5. W{\"u}rzburger ''Workshop IP Netzmanagement, IP Netzplanung und Optimierung''}, event_place = {W{\"u}rzburg, Germany}, event_name = {5. W{\"u}rzburger ''Workshop IP Netzmanagement, IP Netzplanung und Optimierung''}, event_date = {March 2005}, author = {Rieche, Simon and Fouquet, Marc and Niedermayer, Heiko and Wehrle, Klaus and Carle, Georg} } @Inproceedings { 200503goetzp2psawindowsfilesharing, title = {Spontaneous Windows File Sharing via Virtual Groups}, year = {2005}, month = {2}, day = {28}, volume = {61}, pages = {143-146}, abstract = {Although File and printer sharing services have been deployed almost ubiquitously for a long time as part of Microsoft Windows, only recent peer-to-peer applications popularized file-sharing on a global scale. As the Windows CIFS protocol was designed for local area networks, its use has been con?ned to relatively small environments. We propose a mechanism to set up spontaneous virtual groups that allow to use legacy Windows file and printer sharing globally in virtual LANs.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2005/2005-goetz-kivs-spontaneous-file-sharing.pdf}, misc2 = {print}, editor = {Paul M{\"u}ller, Reinhard Gotzhein, Jens B. Schmitt}, publisher = {Gesellschaft f{\"u}r Informatik (GI)}, address = {Bonn, Germany}, howpublished = {print}, series = {LNI}, booktitle = {Proceedings of Workshop on Peer-to-Peer-Systems and -Applications}, organization = {Gesellschaft f{\"u}r Informatik (GI)}, event_place = {Kaiserslautern, Germany}, event_name = {Kommunikation in Verteilten Systemen (KiVS), Kaiserslautern, Germany}, event_date = {2005-02-28}, language = {en}, ISBN = {3-88579-390-3}, reviewed = {1}, author = {G{\"o}tz, Stefan and Wehrle, Klaus} } @Article { 200504landsiedelpikenergy, title = {Enabling Detailed Modeling and Analysis of Sensor Networks}, journal = {Special Issue on Sensor Networks, PIK Journal}, year = {2005}, volume = {28}, number = {2}, abstract = {Simulation is the de-facto standard tool for the evaluation of distributed and communication systems like sensor networks. Most simulation efforts focus on protocol- and algorithm-level issues, thus depending on the right choice and configuration of models. However, as such models commonly neglect time dependent issues, many research challenges, like energy consumption and radio channel utilization still remain. In this article we present two new tools to model and analyze sensor networks: Avrora, a fast and accurate sensor network simulator, and AEON, a novel tool built on top of Avrora, to evaluate the energy consumption and to accurately predict the lifetime of sensor networks. Avrora is a highly scalable instruction-level simulator for sensor network programs. It simulates the execution of the program down to the level of individual clock cycles, a time quantum of about 135 ns. By incorporating state of the art simulation techniques, including an efficiently maintained event queue, fast-forward through sleep-time, and parallel simulation, it can simulate entire networks of nodes in real time. AEON's energy model is based on Avrora and makes use of the cycle accurate execution of sensor node applications for precise energy measurements. Due to limited energy resources, power consumption is a crucial characteristic of sensor networks. AEON uses accurate measurements of node current draw and the execution of real code to enable accurate prediction of the actual power consumption of sensor nodes. Consequently, it prevents erroneous assumptions on node and network lifetime. Moreover, our detailed energy model allows to compare different low power and energy aware approaches in terms of energy efficiency. Thus, it enables a highly precise estimation of the overall lifetime of a sensor network.}, author = {Landsiedel, Olaf and Wehrle, Klaus and Titzer, Ben L and Palsberg, Jens} } @Inbook { 200502IThandbook, title = {IP-QoS: Flexible and Scalable Quality-of-Service with Differentiated Services}, year = {2005}, pages = {33 pages}, editor = {Richard Zurawski}, publisher = {CRC Press}, chapter = {xx}, booktitle = {The Industrial Information Technology Handbook}, author = {Wehrle, Klaus} } @Inbook { 200509riechep2pbookreliability, title = {Reliability and Load Balancing in Distributed Hash Tables}, year = {2005}, pages = {119-135}, editor = {Ralf Steinmetz, Klaus Wehrle}, publisher = {Springer}, address = {Heidelberg, Germany}, series = {Lecture Notes in Computer Science, LNCS}, chapter = {9}, booktitle = {Peer-to-Peer Systems and Applications}, author = {Rieche, Simon and Niedermayer, Heiko and G{\"o}tz, Stefan and Wehrle, Klaus} } @Inbook { 200509goetzp2pbookdhtalgorithms, title = {Selected Distributed Hash Table Algorithms}, year = {2005}, pages = {95-117}, editor = {Ralf Steinmetz, Klaus Wehrle}, publisher = {Springer}, address = {Heidelberg, Germany}, series = {Lecture Notes in Computer Science, LNCS}, chapter = {8}, booktitle = {Peer-to-Peer Systems and Applications}, author = {G{\"o}tz, Stefan and Rieche, Simon and Wehrle, Klaus} } @Inbook { 200509wehrlep2pbookdhts, title = {Distributed Hash Tables}, year = {2005}, pages = {79-93}, editor = {Ralf Steinmetz, Klaus Wehrle}, publisher = {Springer}, address = {Heidelberg, Germany}, series = {Lecture Notes in Computer Science, LNCS}, chapter = {7}, booktitle = {Peer-to-Peer Systems and Applications}, author = {Wehrle, Klaus and G{\"o}tz, Stefan and Rieche, Simon} } @Conference { 200509petraksoftcommobility, title = {Towards Realistic Strategy-Based Mobility Models for Ad Hoc Communication}, year = {2005}, booktitle = {Proceedings of the 2005 Conference on Software for Communication Systems and Computer Networks}, author = {Petrak, Leo and Landsiedel, Olaf and Wehrle, Klaus} } @Conference { 200509landsiedelp2ptdht, title = {T-DHT: Topology-Based Distributed Hash Tables}, year = {2005}, abstract = {In this paper, we introduce topology-based distributed hash tables (T-DHT) as an infrastructure for data-centric storage, information processing, and routing in ad hoc and sensor networks. T-DHTs do not rely on location information and work even in the presence of voids in the network. Using a virtual coordinate system, we construct a distributed hash table which is strongly oriented to the underlying network topology. Thus, adjacent areas in the hash table commonly have a direct link in the network. Routing in the T-DHT guarantees reachability and introduces low hop-overhead compared with the shortest path.}, booktitle = {Proceedings of Fifth International IEEE Conference on Peer-to-Peer-Computing, Konstanz, Germany}, author = {Landsiedel, Olaf and Lehmann, Katharina and Wehrle, Klaus} } @Inproceedings { 200503landsiedelfgsnaeon, title = {Project AEON}, year = {2005}, number = {481}, pages = {72-76}, abstract = {Power consumption is a crucial characteristic of sensor networks and their applications, as sensor nodes are commonly battery driven. Although recent research focuses strongly on energy aware applications and operating systems, power consumption is still a limiting factor. Once sensor nodes are deployed, it is challenging and sometimes even impossible to change batteries. As a result, erroneous lifetime prediction causes high costs and may render a sensor network useless, before its purpose is fulfilled. In this paper we present AEON, a novel evaluation tool to quantitatively predict power consumption of sensor nodes and whole sensor networks. Our energy model, based on measurements of node current draw and the execution of real code, enables accurate prediction of the actual power consumption of sensor nodes. Consequently, preventing erroneous assumptions on node and network lifetime. Moreover, our detailed energy model allows to compare different low power and energy aware approaches in terms of energy efficiency.}, address = {Z{\"u}rich, CH}, booktitle = {Proceedings of the 4th GI/ITG KuVS Fachgespr{\"a}ch ''Wireless Sensor Networks'', Techical Report No. 481}, author = {Landsiedel, Olaf and Wehrle, Klaus and Rieche, Simon and G{\"o}tz, Stefan and Petrak, Leo} } @Inproceedings { 200511goetzmmsctransparent, title = {Transparent End-Host-Based Service Composition through Network Virtualization}, year = {2005}, pages = {31-36}, abstract = {Mobile devices have become a popular medium for delivering multimedia services to end users. A large variety of solutions have been proposed to flexibly compose such services and to provide quality-of-service guarantees for the resulting contents. However, low-level mobility artifacts resulting from network transitions (disconnected operation, reconfiguration, etc.) still prevent a seamless user experience of these technologies. This paper presents an architecture for supporting legacy applications with such solutions in mobile scenarios. Through network virtualization, it hides mobility artifacts and ensures connectivity at the network and transport level. Its adoption for multimedia applications poses unique challenges and advantages, which are discussed herein.}, url = {https://www.comsys.rwth-aachen.de/fileadmin/papers/2005/2005-goetz-mmc-transparent-service-composition.pdf}, misc2 = {print}, editor = {Wolf-Tilo Balke and Klara Nahrstedt}, publisher = {ACM}, address = {New York, NY, USA}, howpublished = {print}, booktitle = {Proceedings of the First ACM International Workshop on Multimedia Service Composition at International Multimedia Conference}, organization = {ACM}, event_place = {Singapore}, event_name = {First ACM International Workshop on Multimedia Service Composition at International Multimedia Conference, Singapore}, event_date = {2005-08-01}, language = {en}, ISBN = {1-59593-245-3}, DOI = {10.1145/1099423.1099430}, reviewed = {1}, author = {G{\"o}tz, Stefan and Wehrle, Klaus} } @Techreport { 200605OCALATechReportUCB, title = {OCALA: An Architecture for Supporting Legacy Applications over Overlays}, year = {2005}, number = {UCB/CSD-005/1397}, abstract = {The ever increasing demand of new applications coupled with the increasing rigidity of the Internet has led researchers to propose overlay networks as a means of introducing new functionality in the Internet. However, despite sustained efforts, few overlays are used widely. Providing support for legacy Internet applications to access such overlays would significantly expand the user base of the overlays, as the users can instantly benefit from the overlay functionality. We present the design and implementation of OCALA, an Overlay Convergence Architecture for Legacy Applications. Unlike previous efforts, OCALA allows users to access different overlays simultaneously, as well as hosts in different overlays to communicate with each other. In addition, OCALA reduces the implementation burden on the overlay developers, by factoring out the functions commonly required to support legacy applications, such as tapping legacy traffic, authentication and encryption. Our implementation of OCALA as a proxy requires no changes to the applications or operating systems. We currently support two overlays, i3 and RON, on Linux and Windows XP/2000 platforms. We (and a few other research groups and end-users) have used the proxy over a eleven-month period with many legacy applications ranging from web browsers to remote desktop applications.}, url = {http://ocala.cs.berkeley.edu}, address = {UCB, Berkeley, USA}, institution = {University of California at Berkeley}, author = {Joseph, Dilip and Kannan, Jayanthkumar and Kubota, Ayumu and Stoica, Ion and Wehrle, Klaus} } @Conference { rieche2004thermaldissipation, title = {A Thermal-Dissipation-based Approach for Balancing Data Load in Distributed Hash Tables}, year = {2004}, month = {11}, pages = {15-23}, abstract = {A major objective of peer-to-peer (P2P) systems is the management of large amounts of data distributed across many systems. Distributed hash tables (DHT) are designed for highly scalable, self-organizing, and efficient distribution and lookup of data, whereby data is stored globally persistent. The range of values of the corresponding hash function is partitioned and each interval is assigned to a node of the DHT. Because the assignment of data to nodes is based on hash functions, one assumes that the respective data load is distributed evenly across all participating nodes. However most DHT show difficulties with load balancing as we demonstrate in this paper. As a solution for this problem, we present a new and very simple approach for balancing stored data between peers in a fashion analogous to the dissipation of heat energy in materials. We compare this algorithm with other approaches for load balancing and present results based on simulations and a prototype implementation. This new algorithm improves the distribution of load in DHT without requiring major changes of the DHT themselves. In addition, we show that the fault tolerance of peer-to-peer systems is increased by the proposed algorithm.}, url = {http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?isnumber=29935\&arnumber=1367197\&count=128\&index=2}, misc2 = {Print}, publisher = {IEEE Press}, booktitle = {Proceedings of LCN 2004 – 29th IEEE Conference on Local Computer Networks}, organization = {IEEE}, event_place = {Tampa, Florida, USA}, event_name = {LCN 2004 – 29th IEEE Conference on Local Computer Networks}, event_date = {November 2004}, language = {en}, ISBN = {0-7695-2260-2}, DOI = {10.1109/LCN.2004.10}, author = {Rieche, Simon and Petrak, Leo and Wehrle, Klaus} } @Inproceedings { 200410riechehotp2preliability, title = {Reliability of Data in Structured Peer-to-Peer Systems}, year = {2004}, month = {10}, pages = {108-113}, abstract = {Peer-to-Peer (P2P) systems are very useful for managing large amounts of widely distributed data. For this purpose Distributed Hash Tables (DHT) offer a highly scalable and self-organizing paradigm for efficient distribution and retrieval of data. Thereby a common assumption of P2P-Systems is, that the participating nodes are unreliable and may fail at any time. Since many of research goes into the design of DHT lookup services, these systems aim to provide a stable global addressing structure. But to storage data reliable in a DHT only few techniques were already developed. However since data has to be stored persistent in the network, it should be retrieved anytime, even if nodes fail. In this work we discuss possibilities to store data fault tolerant in a structured Peer-to-Peer system.}, misc2 = {Print}, booktitle = {Proceedings of HOT-P2P '04: Hot Topics in Peer-to-Peer Computing at 12th Annual Meeting of the IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS)}, event_place = {Volendam, Netherlands}, event_name = {HOT-P2P '04: Hot Topics in Peer-to-Peer Computing at 12th Annual Meeting of the IEEE International Symposium on Modeling, Analysis, and Simulation of Computer}, event_date = {Oct. 2004}, language = {en}, reviewed = {1}, author = {Rieche, Simon and Wehrle, Klaus and Landsiedel, Olaf and G{\"o}tz, Stefan and Petrak, Leo} } @Inproceedings { rieche2004comparison, title = {Comparison of Load Balancing Algorithms for Structured Peer-to-Peer Systems}, year = {2004}, month = {9}, volume = {51}, misc2 = {Print}, publisher = {GI. LNI}, address = {Bonn, Germany}, series = {LNI}, booktitle = {Proceedings of Workshop on Algorithms and Protocols for Efficient Peer-to-Peer Applications (PEPPA), GI-Jahrestagung Informatik 2004}, event_place = {Ulm, Germany}, event_name = {GI-Jahrestagung Informatik 2004}, language = {en}, reviewed = {1}, author = {Rieche, Simon and Petrak, Leo and Wehrle, Klaus} } @Inproceedings { 2006-heer-gi2004, title = {On the Use of Structured P2P Indexing Mechanisms in Mobile Ad-Hoc Scenarios}, year = {2004}, month = {9}, volume = {51}, pages = {239-244}, abstract = {Recently, Distributed Hash Tables evolved to a preferred approach for decentralized data management in widely distributed systems. Due to their crucial characteristics – namely scalability, flexibility, and resilience – they are quite interesting for being applied in ad-hoc networks. But, there are plenty of open questions concerning the applicability of Distributed Hash Tables in mobile ad-hoc scenarios: Do new problems arise when both technologies are used together? Are there any synergy effects when both technologies are combined? Are the results and assumptions, made for the infrastructural Internet, still true if a mobile ad-hoc network is used instead? In this paper, we discuss these and further questions and offer some solutions for using Distributed Hash Tables in ad-hoc networks.}, misc2 = {Print}, publisher = {GI. LNI}, address = {Bonn, Germany}, series = {LNI}, booktitle = {Proceedings of Workshop on Algorithms and Protocols for Efficient Peer-to-Peer Applications (PEPPA), GI-Jahrestagung Informatik 2004, Bonn, Germany}, event_place = {Ulm, Germany}, event_name = {GI-Jahrestagung Informatik 2004}, language = {en}, ISBN = {3-88579-380-6}, reviewed = {1}, author = {Heer, Tobias and Niedermayer, Heiko and Petrak, Leo and Rieche, Simon and Wehrle, Klaus} } @Article { 2004steinmetzwehrleP2PNetworking, title = {Peer-to-Peer-Networking \& -Computing}, journal = {Informatik-Spektrum}, year = {2004}, volume = {27}, number = {1}, pages = {51-54}, author = {Steinmetz, Ralf and Wehrle, Klaus} } @Inproceedings { 200410wehrlefgpcintegriertekonstruktionsmethode, title = {Integrierte Konstruktionsmethoden f{\"u}r flexible Protokolle in ubiquit{\"a}ren Kommunikationssystemen}, year = {2004}, address = {Stuttgart, Germany}, booktitle = {Proceedings of the GI/ITG KuVS Fachgespr{\"a}ch Systemsoftware f{\"u}r Pervasive Computing}, author = {Wehrle, Klaus and Landsiedel, Olaf and Rieche, Simon and G{\"o}tz, Stefan and Petrak, Leo} } @Inproceedings { 200407wehrlesmsoipncontentoriented, title = {Content-oriented Bridging of Today's Internet Heterogeneity}, year = {2004}, number = {04411}, editor = {Matthias Bossardt and Georg Carle and D. Hutchison and Hermann de Meer and Bernhard Plattner}, publisher = {Internationales Begegnungs- und Forschungszentrum fuer Informatik (IBFI), Schloss Dagstuhl, Germany}, series = {Dagstuhl Seminar Proceedings}, booktitle = {Service Management and Self-Organization in IP-based Networks}, author = {Wehrle, Klaus and G{\"o}tz, Stefan} } @Inproceedings { 200410acmmultimediai3composition, title = {Support for Service Composition in i3}, year = {2004}, url = {http://i3.cs.berkeley.edu}, address = {New York, USA}, booktitle = {Proceedings of ACM Multimedia 2004}, organization = {ACM}, author = {Lakshminarayanan, Karthik and Stoica, Ion and Wehrle, Klaus} } @Techreport { 200606i3proxytechreport, title = {Supporting Legacy Applications over i3}, year = {2004}, number = {UCB/CSD-04-1342}, abstract = {Providing support for legacy applications is a crucial component of many overlay networks, as it allows end-users to instantly benefit from the functionality introduced by these overlays. This paper presents the design and implementation of a proxy-based solution to support legacy applications in the context of the i3 overlay [24]. The proxy design relies on an address virtualization technique which allows the proxy to tunnel the legacy traffic over the overlay transparently. Our solution can preserve IP packet headers on an end-to-end basis, even when end-host IP addresses change, or when endhosts live in different address spaces (e.g., behind NATs). In addition, our solution allows the use of human-readable names to refer to hosts or services, and requires no changes to applications or operating systems. To illustrate how the proxy enables legacy applications to take advantage of the overlay (i.e., i3) functionality, we present four examples: enabling access to machines behind NAT boxes, secure Intranet access, routing legacy traffic through Bro, an intrusion detection system, and anonymous web download. We have implemented the proxy on Linux andWindows XP/2000 platforms, and used it over the i3 service on PlanetLab over a three month period with a variety of legacy applications ranging from web browsers to operating system-specific file sharing.}, url = {http://i3.cs.berkeley.edu}, address = {UCB, Berkeley, USA}, institution = {University of California at Berkeley}, type = {Technical Report}, author = {Kannan, Jayanthkumar and Kubota, Ayumu and Lakshminarayanan, Karthik and Stoica, Ion and Wehrle, Klaus} }