{"date_updated":"2023-01-10T10:25:27Z","type":"conference","publication":"Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS '19","conference":{"location":"London","end_date":"2019-11-15","start_date":"2019-11-11","name":"26th ACM Conference on Computer and Communications Security"},"series_title":"Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS '19","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://eprint.iacr.org/2019/169.pdf","open_access":"1"}],"user_id":"25078","citation":{"apa":"Blömer, J., Bobolz, J., Diemert, D. P., &#38; Eidens, F. (2019). Updatable Anonymous Credentials and Applications to Incentive Systems. <i>Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS ’19</i>. 26th ACM Conference on Computer and Communications Security, London. <a href=\"https://doi.org/10.1145/3319535.3354223\">https://doi.org/10.1145/3319535.3354223</a>","mla":"Blömer, Johannes, et al. “Updatable Anonymous Credentials and Applications to Incentive Systems.” <i>Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS ’19</i>, 2019, doi:<a href=\"https://doi.org/10.1145/3319535.3354223\">10.1145/3319535.3354223</a>.","ama":"Blömer J, Bobolz J, Diemert DP, Eidens F. Updatable Anonymous Credentials and Applications to Incentive Systems. In: <i>Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS ’19</i>. Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS ’19. ; 2019. doi:<a href=\"https://doi.org/10.1145/3319535.3354223\">10.1145/3319535.3354223</a>","ieee":"J. Blömer, J. Bobolz, D. P. Diemert, and F. Eidens, “Updatable Anonymous Credentials and Applications to Incentive Systems,” presented at the 26th ACM Conference on Computer and Communications Security, London, 2019, doi: <a href=\"https://doi.org/10.1145/3319535.3354223\">10.1145/3319535.3354223</a>.","short":"J. Blömer, J. Bobolz, D.P. Diemert, F. Eidens, in: Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS ’19, 2019.","chicago":"Blömer, Johannes, Jan Bobolz, Denis Pascal Diemert, and Fabian Eidens. “Updatable Anonymous Credentials and Applications to Incentive Systems.” In <i>Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS ’19</i>. Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS ’19, 2019. <a href=\"https://doi.org/10.1145/3319535.3354223\">https://doi.org/10.1145/3319535.3354223</a>.","bibtex":"@inproceedings{Blömer_Bobolz_Diemert_Eidens_2019, series={Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS ’19}, title={Updatable Anonymous Credentials and Applications to Incentive Systems}, DOI={<a href=\"https://doi.org/10.1145/3319535.3354223\">10.1145/3319535.3354223</a>}, booktitle={Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS ’19}, author={Blömer, Johannes and Bobolz, Jan and Diemert, Denis Pascal and Eidens, Fabian}, year={2019}, collection={Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS ’19} }"},"title":"Updatable Anonymous Credentials and Applications to Incentive Systems","_id":"13904","department":[{"_id":"7"},{"_id":"64"}],"author":[{"full_name":"Blömer, Johannes","id":"23","last_name":"Blömer","first_name":"Johannes"},{"full_name":"Bobolz, Jan","id":"27207","last_name":"Bobolz","first_name":"Jan"},{"first_name":"Denis Pascal","full_name":"Diemert, Denis Pascal","last_name":"Diemert","id":"44071"},{"full_name":"Eidens, Fabian","id":"25078","last_name":"Eidens","first_name":"Fabian"}],"status":"public","year":"2019","file":[{"relation":"main_file","content_type":"application/pdf","access_level":"closed","creator":"jbobolz","file_size":838949,"date_updated":"2019-10-18T08:07:49Z","date_created":"2019-10-18T08:07:49Z","file_name":"full_eprinted_v2.pdf","file_id":"13907"}],"doi":"10.1145/3319535.3354223","ddc":["006"],"date_created":"2019-10-18T08:09:44Z","file_date_updated":"2019-10-18T08:07:49Z","oa":"1","abstract":[{"text":"In this paper, we introduce updatable anonymous credential systems (UACS) and use them to construct a new privacy-preserving incentive system. In a UACS, a user holding a credential certifying some attributes can interact with the corresponding issuer to update his attributes. During this, the issuer knows which update function is run, but does not learn the user's previous attributes. Hence the update process preserves anonymity of the user. One example for a class of update functions are additive updates of integer attributes, where the issuer increments an unknown integer attribute value v by some known value k. This kind of update is motivated by an application of UACS to incentive systems. Users in an incentive system can anonymously accumulate points, e.g. in a shop at checkout, and spend them later, e.g. for a discount.","lang":"eng"}],"project":[{"_id":"1","name":"SFB 901"},{"name":"SFB 901 - Project Area C","_id":"4"},{"_id":"13","name":"SFB 901 - Subproject C1"}],"has_accepted_license":"1"}