Fully-Featured Anonymous Credentials with Reputation System

K. Bemmann, J. Blömer, J. Bobolz, H. Bröcher, D. Diemert, F. Eidens, L. Eilers, J. Haltermann, J. Juhnke, B. Otour, L. Porzenheim, S. Pukrop, E. Schilling, M. Schlichtig, M. Stienemeier, in: Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES ’18, ACM, New York, NY, USA, n.d.

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Abstract
We present CLARC (Cryptographic Library for Anonymous Reputation and Credentials), an anonymous credentials system (ACS) combined with an anonymous reputation system. Using CLARC, users can receive attribute-based credentials from issuers. They can efficiently prove that their credentials satisfy complex (access) policies in a privacy-preserving way. This implements anonymous access control with complex policies. Furthermore, CLARC is the first ACS that is combined with an anonymous reputation system where users can anonymously rate services. A user who gets access to a service via a credential, also anonymously receives a review token to rate the service. If a user creates more than a single rating, this can be detected by anyone, preventing users from spamming ratings to sway public opinion. To evaluate feasibility of our construction, we present an open-source prototype implementation.
Publishing Year
Proceedings Title
Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES '18
Conference
ARES 2018 - SECPID
Conference Location
Hamburg, Germany
Conference Date
2018-08-27 – 2018-08-30
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Bemmann K, Blömer J, Bobolz J, et al. Fully-Featured Anonymous Credentials with Reputation System. In: Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES ’18. New York, NY, USA: ACM. doi:10.1145/3230833.3234517
Bemmann, K., Blömer, J., Bobolz, J., Bröcher, H., Diemert, D., Eidens, F., … Stienemeier, M. (n.d.). Fully-Featured Anonymous Credentials with Reputation System. In Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES ’18. New York, NY, USA: ACM. https://doi.org/10.1145/3230833.3234517
@inproceedings{Bemmann_Blömer_Bobolz_Bröcher_Diemert_Eidens_Eilers_Haltermann_Juhnke_Otour_et al., place={New York, NY, USA}, title={Fully-Featured Anonymous Credentials with Reputation System}, DOI={10.1145/3230833.3234517}, booktitle={Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES ’18}, publisher={ACM}, author={Bemmann, Kai and Blömer, Johannes and Bobolz, Jan and Bröcher, Henrik and Diemert, Denis and Eidens, Fabian and Eilers, Lukas and Haltermann, Jan and Juhnke, Jakob and Otour, Burhan and et al.} }
Bemmann, Kai, Johannes Blömer, Jan Bobolz, Henrik Bröcher, Denis Diemert, Fabian Eidens, Lukas Eilers, et al. “Fully-Featured Anonymous Credentials with Reputation System.” In Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES ’18. New York, NY, USA: ACM, n.d. https://doi.org/10.1145/3230833.3234517.
K. Bemmann et al., “Fully-Featured Anonymous Credentials with Reputation System,” in Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES ’18, Hamburg, Germany.
Bemmann, Kai, et al. “Fully-Featured Anonymous Credentials with Reputation System.” Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES ’18, ACM, doi:10.1145/3230833.3234517.
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