--- _id: '43458' author: - first_name: Johannes full_name: Blömer, Johannes id: '23' last_name: Blömer - first_name: Jan full_name: Bobolz, Jan id: '27207' last_name: Bobolz - first_name: Laurens Alexander full_name: Porzenheim, Laurens Alexander id: '47434' last_name: Porzenheim citation: ama: 'Blömer J, Bobolz J, Porzenheim LA. A Generic Construction of an Anonymous Reputation System and Instantiations from Lattices. In: ; 2023.' apa: Blömer, J., Bobolz, J., & Porzenheim, L. A. (2023). A Generic Construction of an Anonymous Reputation System and Instantiations from Lattices. Asiacrypt 2023, Guangzhou, China. bibtex: '@inproceedings{Blömer_Bobolz_Porzenheim_2023, title={A Generic Construction of an Anonymous Reputation System and Instantiations from Lattices}, author={Blömer, Johannes and Bobolz, Jan and Porzenheim, Laurens Alexander}, year={2023} }' chicago: Blömer, Johannes, Jan Bobolz, and Laurens Alexander Porzenheim. “A Generic Construction of an Anonymous Reputation System and Instantiations from Lattices,” 2023. ieee: J. Blömer, J. Bobolz, and L. A. Porzenheim, “A Generic Construction of an Anonymous Reputation System and Instantiations from Lattices,” presented at the Asiacrypt 2023, Guangzhou, China, 2023. mla: Blömer, Johannes, et al. A Generic Construction of an Anonymous Reputation System and Instantiations from Lattices. 2023. short: 'J. Blömer, J. Bobolz, L.A. Porzenheim, in: 2023.' conference: end_date: 2023-12-08 location: Guangzhou, China name: Asiacrypt 2023 start_date: 2023-12-04 date_created: 2023-04-12T08:18:41Z date_updated: 2023-09-07T09:53:26Z department: - _id: '64' language: - iso: eng main_file_link: - open_access: '1' url: https://eprint.iacr.org/2023/464 oa: '1' project: - _id: '1' grant_number: '160364472' name: 'SFB 901: SFB 901' - _id: '13' name: 'SFB 901 - C1: SFB 901 - Subproject C1' - _id: '4' name: 'SFB 901 - C: SFB 901 - Project Area C' status: public title: A Generic Construction of an Anonymous Reputation System and Instantiations from Lattices type: conference user_id: '47434' year: '2023' ... --- _id: '10306' author: - first_name: Laurens Alexander full_name: Porzenheim, Laurens Alexander id: '47434' last_name: Porzenheim citation: ama: Porzenheim LA. Post-Quantum Secure Group Signatures.; 2019. apa: Porzenheim, L. A. (2019). Post-Quantum Secure Group Signatures. bibtex: '@book{Porzenheim_2019, title={Post-Quantum Secure Group Signatures}, author={Porzenheim, Laurens Alexander}, year={2019} }' chicago: Porzenheim, Laurens Alexander. Post-Quantum Secure Group Signatures, 2019. ieee: L. A. Porzenheim, Post-Quantum Secure Group Signatures. 2019. mla: Porzenheim, Laurens Alexander. Post-Quantum Secure Group Signatures. 2019. short: L.A. Porzenheim, Post-Quantum Secure Group Signatures, 2019. date_created: 2019-06-26T09:12:47Z date_updated: 2022-01-06T06:50:36Z ddc: - '000' department: - _id: '64' file: - access_level: open_access content_type: application/pdf creator: laurensp date_created: 2019-06-26T09:08:23Z date_updated: 2019-06-26T09:19:15Z file_id: '10307' file_name: thesis_final.pdf file_size: 899233 relation: main_file file_date_updated: 2019-06-26T09:19:15Z has_accepted_license: '1' language: - iso: eng oa: '1' status: public supervisor: - first_name: Johannes full_name: Blömer, Johannes id: '23' last_name: Blömer title: Post-Quantum Secure Group Signatures type: mastersthesis user_id: '47434' year: '2019' ... --- _id: '3265' abstract: - lang: eng text: "We present CLARC (Cryptographic Library for Anonymous Reputation and Credentials), an anonymous credentials system (ACS) combined with an anonymous reputation system.\r\n\r\nUsing 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.\r\n\r\nFurthermore, 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.\r\n\r\nTo evaluate feasibility of our construction, we present an open-source prototype implementation." author: - first_name: Kai full_name: Bemmann, Kai last_name: Bemmann - first_name: Johannes full_name: Blömer, Johannes id: '23' last_name: Blömer - first_name: Jan full_name: Bobolz, Jan id: '27207' last_name: Bobolz - first_name: Henrik full_name: Bröcher, Henrik id: '41047' last_name: Bröcher - first_name: Denis Pascal full_name: Diemert, Denis Pascal id: '44071' last_name: Diemert - first_name: Fabian full_name: Eidens, Fabian id: '25078' last_name: Eidens - first_name: Lukas full_name: Eilers, Lukas last_name: Eilers - first_name: Jan Frederik full_name: Haltermann, Jan Frederik id: '44413' last_name: Haltermann - first_name: Jakob full_name: Juhnke, Jakob id: '48090' last_name: Juhnke - first_name: Burhan full_name: Otour, Burhan last_name: Otour - first_name: Laurens Alexander full_name: Porzenheim, Laurens Alexander id: '47434' last_name: Porzenheim - first_name: Simon full_name: Pukrop, Simon last_name: Pukrop - first_name: Erik full_name: Schilling, Erik last_name: Schilling - first_name: Michael full_name: Schlichtig, Michael id: '32312' last_name: Schlichtig - first_name: Marcel full_name: Stienemeier, Marcel last_name: Stienemeier citation: ama: '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' apa: 'Bemmann, K., Blömer, J., Bobolz, J., Bröcher, H., Diemert, D. P., 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' bibtex: '@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 Pascal and Eidens, Fabian and Eilers, Lukas and Haltermann, Jan Frederik and Juhnke, Jakob and Otour, Burhan and et al.} }' chicago: 'Bemmann, Kai, Johannes Blömer, Jan Bobolz, Henrik Bröcher, Denis Pascal 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.' ieee: 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. mla: 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. short: 'K. Bemmann, J. Blömer, J. Bobolz, H. Bröcher, D.P. Diemert, F. Eidens, L. Eilers, J.F. Haltermann, J. Juhnke, B. Otour, L.A. 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.' conference: end_date: 2018-08-30 location: Hamburg, Germany name: ARES 2018 - SECPID start_date: 2018-08-27 date_created: 2018-06-14T11:19:29Z date_updated: 2022-01-06T06:59:07Z ddc: - '000' department: - _id: '64' doi: 10.1145/3230833.3234517 file: - access_level: closed content_type: application/pdf creator: feidens date_created: 2018-11-08T10:17:39Z date_updated: 2018-11-08T10:17:39Z file_id: '5428' file_name: react_acs.pdf file_size: 920843 relation: main_file file_date_updated: 2018-11-08T10:17:39Z has_accepted_license: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://eprint.iacr.org/2018/835 oa: '1' place: New York, NY, USA project: - _id: '1' name: SFB 901 - _id: '4' name: SFB 901 - Project Area C - _id: '13' name: SFB 901 - Subproject C1 - _id: '44' name: KogniHome - die mitdenkende Wohnung publication: Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES '18 publication_identifier: isbn: - 978-1-4503-6448-5 publication_status: accepted publisher: ACM quality_controlled: '1' related_material: link: - relation: software url: https://github.com/upbcuk status: public title: Fully-Featured Anonymous Credentials with Reputation System type: conference user_id: '25078' year: '2018' ...