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@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}
}