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We observe that, in certain usage scenarios, e.g. crowd work, the rater anonymity property typically imposed on reputation systems is not necessary. Instead, we propose a relaxed notion of rater anonymity that is more applicable in the crowd work scenario. This allows us to construct a secure personal reputation system from simple cryptographic primitives."}],"language":[{"iso":"eng"}],"ddc":["000"]},{"type":"conference","publication":"12th International Symposium on Foundations and Practice of Security, FPS 2019","abstract":[{"text":"We present a searchable encryption scheme for dynamic document collections in a multi-user scenario. Our scheme features fine-grained access control to search results, as well as access control to operations such as adding documents to the document collection, or changing individual documents. The scheme features verifiability of search results. 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Brauer, Classification and Approximation of Geometric Location Problems, Paderborn, 2019.","bibtex":"@book{Brauer_2019, place={Paderborn}, title={Classification and Approximation of Geometric Location Problems}, DOI={<a href=\"https://doi.org/10.17619/UNIPB/1-816\">10.17619/UNIPB/1-816</a>}, author={Brauer, Sascha}, year={2019} }","mla":"Brauer, Sascha. <i>Classification and Approximation of Geometric Location Problems</i>. 2019, doi:<a href=\"https://doi.org/10.17619/UNIPB/1-816\">10.17619/UNIPB/1-816</a>.","apa":"Brauer, S. (2019). <i>Classification and Approximation of Geometric Location Problems</i>. Paderborn. <a href=\"https://doi.org/10.17619/UNIPB/1-816\">https://doi.org/10.17619/UNIPB/1-816</a>","ieee":"S. Brauer, <i>Classification and Approximation of Geometric Location Problems</i>. Paderborn, 2019.","chicago":"Brauer, Sascha. <i>Classification and Approximation of Geometric Location Problems</i>. Paderborn, 2019. <a href=\"https://doi.org/10.17619/UNIPB/1-816\">https://doi.org/10.17619/UNIPB/1-816</a>.","ama":"Brauer S. <i>Classification and Approximation of Geometric Location Problems</i>. Paderborn; 2019. doi:<a href=\"https://doi.org/10.17619/UNIPB/1-816\">10.17619/UNIPB/1-816</a>"},"place":"Paderborn","year":"2019"},{"type":"conference","status":"public","_id":"13904","project":[{"name":"SFB 901","_id":"1"},{"_id":"4","name":"SFB 901 - Project Area C"},{"_id":"13","name":"SFB 901 - Subproject C1"}],"department":[{"_id":"7"},{"_id":"64"}],"series_title":"Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS '19","user_id":"25078","file_date_updated":"2019-10-18T08:07:49Z","has_accepted_license":"1","citation":{"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>.","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>.","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>","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} }","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.","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>.","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>"},"date_updated":"2023-01-10T10:25:27Z","oa":"1","author":[{"id":"23","full_name":"Blömer, Johannes","last_name":"Blömer","first_name":"Johannes"},{"first_name":"Jan","last_name":"Bobolz","id":"27207","full_name":"Bobolz, Jan"},{"last_name":"Diemert","full_name":"Diemert, Denis Pascal","id":"44071","first_name":"Denis Pascal"},{"first_name":"Fabian","last_name":"Eidens","id":"25078","full_name":"Eidens, Fabian"}],"conference":{"start_date":"2019-11-11","name":"26th ACM Conference on Computer and Communications Security","location":"London","end_date":"2019-11-15"},"doi":"10.1145/3319535.3354223","main_file_link":[{"open_access":"1","url":"https://eprint.iacr.org/2019/169.pdf"}],"publication":"Proceedings of the 2019 ACM SIGSAC Conference on Computer and Communications Security - CCS '19","abstract":[{"lang":"eng","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."}],"file":[{"relation":"main_file","content_type":"application/pdf","file_name":"full_eprinted_v2.pdf","access_level":"closed","file_id":"13907","file_size":838949,"date_created":"2019-10-18T08:07:49Z","creator":"jbobolz","date_updated":"2019-10-18T08:07:49Z"}],"ddc":["006"],"language":[{"iso":"eng"}],"year":"2019","date_created":"2019-10-18T08:09:44Z","title":"Updatable Anonymous Credentials and Applications to Incentive Systems"},{"page":"470-490","citation":{"bibtex":"@inproceedings{Blömer_Eidens_Juhnke_2018, place={Cham}, title={Practical, Anonymous, and Publicly Linkable Universally-Composable Reputation Systems}, DOI={<a href=\"https://doi.org/10.1007/978-3-319-76953-0_25\">10.1007/978-3-319-76953-0_25</a>}, booktitle={Topics in Cryptology - {CT-RSA} 2018 - The Cryptographers’ Track at the {RSA} Conference 2018, Proceedings}, publisher={Springer International Publishing}, author={Blömer, Johannes and Eidens, Fabian and Juhnke, Jakob}, year={2018}, pages={470–490} }","short":"J. Blömer, F. Eidens, J. Juhnke, in: Topics in Cryptology - {CT-RSA} 2018 - The Cryptographers’ Track at the {RSA} Conference 2018, Proceedings, Springer International Publishing, Cham, 2018, pp. 470–490.","mla":"Blömer, Johannes, et al. “Practical, Anonymous, and Publicly Linkable Universally-Composable Reputation Systems.” <i>Topics in Cryptology - {CT-RSA} 2018 - The Cryptographers’ Track at the {RSA} Conference 2018, Proceedings</i>, Springer International Publishing, 2018, pp. 470–90, doi:<a href=\"https://doi.org/10.1007/978-3-319-76953-0_25\">10.1007/978-3-319-76953-0_25</a>.","apa":"Blömer, J., Eidens, F., &#38; Juhnke, J. (2018). Practical, Anonymous, and Publicly Linkable Universally-Composable Reputation Systems. In <i>Topics in Cryptology - {CT-RSA} 2018 - The Cryptographers’ Track at the {RSA} Conference 2018, Proceedings</i> (pp. 470–490). Cham: Springer International Publishing. <a href=\"https://doi.org/10.1007/978-3-319-76953-0_25\">https://doi.org/10.1007/978-3-319-76953-0_25</a>","chicago":"Blömer, Johannes, Fabian Eidens, and Jakob Juhnke. “Practical, Anonymous, and Publicly Linkable Universally-Composable Reputation Systems.” In <i>Topics in Cryptology - {CT-RSA} 2018 - The Cryptographers’ Track at the {RSA} Conference 2018, Proceedings</i>, 470–90. Cham: Springer International Publishing, 2018. <a href=\"https://doi.org/10.1007/978-3-319-76953-0_25\">https://doi.org/10.1007/978-3-319-76953-0_25</a>.","ieee":"J. Blömer, F. Eidens, and J. Juhnke, “Practical, Anonymous, and Publicly Linkable Universally-Composable Reputation Systems,” in <i>Topics in Cryptology - {CT-RSA} 2018 - The Cryptographers’ Track at the {RSA} Conference 2018, Proceedings</i>, San Francisco, CA, USA, 2018, pp. 470–490.","ama":"Blömer J, Eidens F, Juhnke J. Practical, Anonymous, and Publicly Linkable Universally-Composable Reputation Systems. In: <i>Topics in Cryptology - {CT-RSA} 2018 - The Cryptographers’ Track at the {RSA} Conference 2018, Proceedings</i>. Cham: Springer International Publishing; 2018:470-490. doi:<a href=\"https://doi.org/10.1007/978-3-319-76953-0_25\">10.1007/978-3-319-76953-0_25</a>"},"place":"Cham","publication_identifier":{"issn":["0302-9743","1611-3349"],"isbn":["9783319769523","9783319769530"]},"has_accepted_license":"1","publication_status":"published","conference":{"location":"San Francisco, CA, USA","end_date":"2018-04-20","start_date":"2018-04-16","name":"Topics in Cryptology - {CT-RSA} 2018 - The Cryptographers' Track at the {RSA} Conference 2018"},"doi":"10.1007/978-3-319-76953-0_25","main_file_link":[{"url":"https://eprint.iacr.org/2018/029","open_access":"1"}],"author":[{"first_name":"Johannes","id":"23","full_name":"Blömer, Johannes","last_name":"Blömer"},{"id":"25078","full_name":"Eidens, Fabian","last_name":"Eidens","first_name":"Fabian"},{"last_name":"Juhnke","id":"48090","full_name":"Juhnke, Jakob","first_name":"Jakob"}],"oa":"1","date_updated":"2022-01-06T06:58:12Z","status":"public","type":"conference","file_date_updated":"2018-11-02T13:45:40Z","department":[{"_id":"7"},{"_id":"64"}],"user_id":"477","_id":"2862","project":[{"_id":"1","name":"SFB 901"},{"_id":"4","name":"SFB 901 - Project Area C"},{"_id":"13","name":"SFB 901 - Subproject C1"}],"year":"2018","title":"Practical, Anonymous, and Publicly Linkable Universally-Composable Reputation Systems","date_created":"2018-05-24T11:14:02Z","publisher":"Springer International Publishing","file":[{"relation":"main_file","success":1,"content_type":"application/pdf","file_id":"5253","access_level":"closed","file_name":"PracticalAnonymousAndPubliclyL.pdf","file_size":3371773,"date_created":"2018-11-02T13:45:40Z","creator":"ups","date_updated":"2018-11-02T13:45:40Z"}],"publication":"Topics in Cryptology - {CT-RSA} 2018 - The Cryptographers' Track at the {RSA} Conference 2018, Proceedings","language":[{"iso":"eng"}],"ddc":["004"]},{"issue":"2","year":"2018","date_created":"2018-05-08T09:18:54Z","title":"Voronoi Cells of Lattices with Respect to Arbitrary Norms","publication":"SIAM Journal on Applied Algebra and Geometry.","file":[{"date_created":"2018-11-02T15:22:55Z","creator":"ups","date_updated":"2018-11-02T15:22:55Z","file_name":"17m1132045.pdf","access_level":"closed","file_id":"5300","file_size":1131048,"content_type":"application/pdf","relation":"main_file","success":1}],"language":[{"iso":"eng"}],"ddc":["000"],"publication_status":"epub_ahead","has_accepted_license":"1","publication_identifier":{"eissn":["2470-6566"]},"citation":{"apa":"Blömer, J., &#38; Kohn, K. (2018). Voronoi Cells of Lattices with Respect to Arbitrary Norms. <i>SIAM Journal on Applied Algebra and Geometry.</i>, <i>2</i>(2), 314–338. <a href=\"https://doi.org/10.1137/17M1132045\">https://doi.org/10.1137/17M1132045</a>","bibtex":"@article{Blömer_Kohn_2018, title={Voronoi Cells of Lattices with Respect to Arbitrary Norms}, volume={2}, DOI={<a href=\"https://doi.org/10.1137/17M1132045\">10.1137/17M1132045</a>}, number={2}, journal={SIAM Journal on Applied Algebra and Geometry.}, author={Blömer, Johannes and Kohn, Kathlén}, year={2018}, pages={314–338} }","short":"J. Blömer, K. Kohn, SIAM Journal on Applied Algebra and Geometry. 2 (2018) 314–338.","mla":"Blömer, Johannes, and Kathlén Kohn. “Voronoi Cells of Lattices with Respect to Arbitrary Norms.” <i>SIAM Journal on Applied Algebra and Geometry.</i>, vol. 2, no. 2, 2018, pp. 314–38, doi:<a href=\"https://doi.org/10.1137/17M1132045\">10.1137/17M1132045</a>.","ieee":"J. Blömer and K. Kohn, “Voronoi Cells of Lattices with Respect to Arbitrary Norms,” <i>SIAM Journal on Applied Algebra and Geometry.</i>, vol. 2, no. 2, pp. 314–338, 2018.","chicago":"Blömer, Johannes, and Kathlén Kohn. “Voronoi Cells of Lattices with Respect to Arbitrary Norms.” <i>SIAM Journal on Applied Algebra and Geometry.</i> 2, no. 2 (2018): 314–38. <a href=\"https://doi.org/10.1137/17M1132045\">https://doi.org/10.1137/17M1132045</a>.","ama":"Blömer J, Kohn K. Voronoi Cells of Lattices with Respect to Arbitrary Norms. <i>SIAM Journal on Applied Algebra and Geometry</i>. 2018;2(2):314-338. doi:<a href=\"https://doi.org/10.1137/17M1132045\">10.1137/17M1132045</a>"},"page":"314-338","intvolume":"         2","author":[{"first_name":"Johannes","last_name":"Blömer","id":"23","full_name":"Blömer, Johannes"},{"first_name":"Kathlén","full_name":"Kohn, Kathlén","last_name":"Kohn"}],"volume":2,"date_updated":"2022-01-06T06:57:29Z","doi":"10.1137/17M1132045","type":"journal_article","status":"public","user_id":"477","department":[{"_id":"7"},{"_id":"64"}],"project":[{"name":"SFB 901 - Subproject C1","_id":"13"},{"_id":"1","name":"SFB 901"},{"_id":"4","name":"SFB 901 - Project Area C"}],"_id":"2685","file_date_updated":"2018-11-02T15:22:55Z"},{"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."}],"file":[{"relation":"main_file","content_type":"application/pdf","file_size":920843,"file_id":"5428","access_level":"closed","file_name":"react_acs.pdf","date_updated":"2018-11-08T10:17:39Z","date_created":"2018-11-08T10:17:39Z","creator":"feidens"}],"publication":"Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES '18","ddc":["000"],"language":[{"iso":"eng"}],"year":"2018","quality_controlled":"1","title":"Fully-Featured Anonymous Credentials with Reputation System","publisher":"ACM","date_created":"2018-06-14T11:19:29Z","status":"public","type":"conference","file_date_updated":"2018-11-08T10:17:39Z","_id":"3265","project":[{"name":"SFB 901","_id":"1"},{"_id":"4","name":"SFB 901 - Project Area C"},{"name":"SFB 901 - Subproject C1","_id":"13"},{"_id":"44","name":"KogniHome - die mitdenkende Wohnung"}],"department":[{"_id":"64"}],"user_id":"25078","place":"New York, NY, USA","citation":{"ieee":"K. Bemmann <i>et al.</i>, “Fully-Featured Anonymous Credentials with Reputation System,” in <i>Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES ’18</i>, Hamburg, Germany.","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 <i>Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES ’18</i>. New York, NY, USA: ACM, n.d. <a href=\"https://doi.org/10.1145/3230833.3234517\">https://doi.org/10.1145/3230833.3234517</a>.","ama":"Bemmann K, Blömer J, Bobolz J, et al. Fully-Featured Anonymous Credentials with Reputation System. In: <i>Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES ’18</i>. New York, NY, USA: ACM. doi:<a href=\"https://doi.org/10.1145/3230833.3234517\">10.1145/3230833.3234517</a>","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 <i>Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES ’18</i>. New York, NY, USA: ACM. <a href=\"https://doi.org/10.1145/3230833.3234517\">https://doi.org/10.1145/3230833.3234517</a>","mla":"Bemmann, Kai, et al. “Fully-Featured Anonymous Credentials with Reputation System.” <i>Proceedings of the 13th International Conference on Availability, Reliability and Security - ARES ’18</i>, ACM, doi:<a href=\"https://doi.org/10.1145/3230833.3234517\">10.1145/3230833.3234517</a>.","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={<a href=\"https://doi.org/10.1145/3230833.3234517\">10.1145/3230833.3234517</a>}, 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.} }","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."},"publication_identifier":{"isbn":["978-1-4503-6448-5"]},"has_accepted_license":"1","publication_status":"accepted","related_material":{"link":[{"url":"https://github.com/upbcuk","relation":"software"}]},"conference":{"name":"ARES 2018 - SECPID","start_date":"2018-08-27","end_date":"2018-08-30","location":"Hamburg, Germany"},"doi":"10.1145/3230833.3234517","main_file_link":[{"open_access":"1","url":"https://eprint.iacr.org/2018/835"}],"date_updated":"2022-01-06T06:59:07Z","oa":"1","author":[{"first_name":"Kai","full_name":"Bemmann, Kai","last_name":"Bemmann"},{"first_name":"Johannes","id":"23","full_name":"Blömer, Johannes","last_name":"Blömer"},{"id":"27207","full_name":"Bobolz, Jan","last_name":"Bobolz","first_name":"Jan"},{"id":"41047","full_name":"Bröcher, Henrik","last_name":"Bröcher","first_name":"Henrik"},{"last_name":"Diemert","id":"44071","full_name":"Diemert, Denis Pascal","first_name":"Denis Pascal"},{"id":"25078","full_name":"Eidens, Fabian","last_name":"Eidens","first_name":"Fabian"},{"full_name":"Eilers, Lukas","last_name":"Eilers","first_name":"Lukas"},{"first_name":"Jan Frederik","last_name":"Haltermann","id":"44413","full_name":"Haltermann, Jan Frederik"},{"first_name":"Jakob","last_name":"Juhnke","id":"48090","full_name":"Juhnke, Jakob"},{"full_name":"Otour, Burhan","last_name":"Otour","first_name":"Burhan"},{"last_name":"Porzenheim","id":"47434","full_name":"Porzenheim, Laurens Alexander","first_name":"Laurens Alexander"},{"last_name":"Pukrop","full_name":"Pukrop, Simon","first_name":"Simon"},{"first_name":"Erik","last_name":"Schilling","full_name":"Schilling, Erik"},{"first_name":"Michael","last_name":"Schlichtig","id":"32312","full_name":"Schlichtig, Michael"},{"first_name":"Marcel","last_name":"Stienemeier","full_name":"Stienemeier, Marcel"}]},{"status":"public","type":"conference","file_date_updated":"2018-11-02T14:39:46Z","_id":"2965","project":[{"_id":"1","name":"SFB 901"},{"_id":"4","name":"SFB 901 - Project Area C"},{"_id":"13","name":"SFB 901 - Subproject C1"}],"department":[{"_id":"64"},{"_id":"568"}],"user_id":"13703","place":"New York, NY, USA","page":"25:1--25:10","citation":{"ama":"Blömer J, Löken N. Cloud Architectures for Searchable Encryption. In: <i>Proceedings of the 13th International Conference on Availability, Reliability and Security, ARES 2018</i>. New York, NY, USA: ACM; :25:1--25:10. doi:<a href=\"https://doi.org/10.1145/3230833.3230853\">10.1145/3230833.3230853</a>","ieee":"J. Blömer and N. Löken, “Cloud Architectures for Searchable Encryption,” in <i>Proceedings of the 13th International Conference on Availability, Reliability and Security, ARES 2018</i>, Hamburg, Germany, pp. 25:1--25:10.","chicago":"Blömer, Johannes, and Nils Löken. “Cloud Architectures for Searchable Encryption.” In <i>Proceedings of the 13th International Conference on Availability, Reliability and Security, ARES 2018</i>, 25:1--25:10. New York, NY, USA: ACM, n.d. <a href=\"https://doi.org/10.1145/3230833.3230853\">https://doi.org/10.1145/3230833.3230853</a>.","short":"J. Blömer, N. Löken, in: Proceedings of the 13th International Conference on Availability, Reliability and Security, ARES 2018, ACM, New York, NY, USA, n.d., pp. 25:1--25:10.","bibtex":"@inproceedings{Blömer_Löken, place={New York, NY, USA}, title={Cloud Architectures for Searchable Encryption}, DOI={<a href=\"https://doi.org/10.1145/3230833.3230853\">10.1145/3230833.3230853</a>}, booktitle={Proceedings of the 13th International Conference on Availability, Reliability and Security, ARES 2018}, publisher={ACM}, author={Blömer, Johannes and Löken, Nils}, pages={25:1--25:10} }","mla":"Blömer, Johannes, and Nils Löken. “Cloud Architectures for Searchable Encryption.” <i>Proceedings of the 13th International Conference on Availability, Reliability and Security, ARES 2018</i>, ACM, pp. 25:1--25:10, doi:<a href=\"https://doi.org/10.1145/3230833.3230853\">10.1145/3230833.3230853</a>.","apa":"Blömer, J., &#38; Löken, N. (n.d.). Cloud Architectures for Searchable Encryption. In <i>Proceedings of the 13th International Conference on Availability, Reliability and Security, ARES 2018</i> (pp. 25:1--25:10). New York, NY, USA: ACM. <a href=\"https://doi.org/10.1145/3230833.3230853\">https://doi.org/10.1145/3230833.3230853</a>"},"has_accepted_license":"1","publication_identifier":{"isbn":["978-1-4503-6448-5"]},"publication_status":"accepted","conference":{"name":"ARES 2018","location":"Hamburg, Germany"},"doi":"10.1145/3230833.3230853","date_updated":"2022-01-06T06:58:49Z","author":[{"last_name":"Blömer","full_name":"Blömer, Johannes","id":"23","first_name":"Johannes"},{"full_name":"Löken, Nils","id":"13703","last_name":"Löken","first_name":"Nils"}],"file":[{"content_type":"application/pdf","relation":"main_file","success":1,"date_created":"2018-11-02T14:39:46Z","creator":"ups","date_updated":"2018-11-02T14:39:46Z","access_level":"closed","file_id":"5278","file_name":"a25-Blomer.pdf","file_size":769807}],"publication":"Proceedings of the 13th International Conference on Availability, Reliability and Security, ARES 2018","ddc":["000"],"language":[{"iso":"eng"}],"year":"2018","quality_controlled":"1","title":"Cloud Architectures for Searchable Encryption","publisher":"ACM","date_created":"2018-06-04T11:33:15Z"},{"_id":"5820","project":[{"name":"SFB 901","_id":"1"},{"_id":"4","name":"SFB 901 - Project Area C"},{"_id":"13","name":"SFB 901 - Subproject C1"}],"department":[{"_id":"7"},{"_id":"64"},{"_id":"79"}],"user_id":"27207","ddc":["000"],"language":[{"iso":"eng"}],"file_date_updated":"2018-12-31T09:55:30Z","type":"working_paper","abstract":[{"text":"In this paper, we investigate the use of trusted execution environments (TEEs, such as Intel's SGX) for an anonymous communication infrastructure over untrusted networks.\r\nFor this, we present the general idea of exploiting trusted execution environments for the purpose of anonymous communication, including a continuous-time security framework that models strong anonymity guarantees in the presence of an adversary that observes all network traffic and can adaptively corrupt a constant fraction of participating nodes.\r\nIn our framework, a participating node can generate a number of unlinkable pseudonyms. Messages are sent from and to pseudonyms, allowing both senders and receivers of messages to remain anonymous. We introduce a concrete construction, which shows viability of our TEE-based approach to anonymous communication. The construction draws from techniques from cryptography and overlay networks. \r\nOur techniques are very general and can be used as a basis for future constructions with similar goals.","lang":"eng"}],"status":"public","file":[{"success":1,"relation":"main_file","content_type":"application/pdf","file_size":470968,"access_level":"closed","file_name":"draft-2018.pdf","file_id":"6435","date_updated":"2018-12-31T09:55:30Z","date_created":"2018-12-31T09:55:30Z","creator":"jbobolz"}],"date_updated":"2022-01-06T07:02:43Z","author":[{"id":"23","full_name":"Blömer, Johannes","last_name":"Blömer","first_name":"Johannes"},{"last_name":"Bobolz","id":"27207","full_name":"Bobolz, Jan","first_name":"Jan"},{"first_name":"Christian","full_name":"Scheideler, Christian","id":"20792","last_name":"Scheideler"},{"last_name":"Setzer","full_name":"Setzer, Alexander","id":"11108","first_name":"Alexander"}],"date_created":"2018-11-25T08:08:40Z","title":"Provably Anonymous Communication Based on Trusted Execution Environments","has_accepted_license":"1","publication_status":"draft","year":"2018","citation":{"apa":"Blömer, J., Bobolz, J., Scheideler, C., &#38; Setzer, A. (n.d.). <i>Provably Anonymous Communication Based on Trusted Execution Environments</i>.","short":"J. Blömer, J. Bobolz, C. Scheideler, A. Setzer, Provably Anonymous Communication Based on Trusted Execution Environments, n.d.","bibtex":"@book{Blömer_Bobolz_Scheideler_Setzer, title={Provably Anonymous Communication Based on Trusted Execution Environments}, author={Blömer, Johannes and Bobolz, Jan and Scheideler, Christian and Setzer, Alexander} }","mla":"Blömer, Johannes, et al. <i>Provably Anonymous Communication Based on Trusted Execution Environments</i>.","ama":"Blömer J, Bobolz J, Scheideler C, Setzer A. <i>Provably Anonymous Communication Based on Trusted Execution Environments</i>.","ieee":"J. Blömer, J. Bobolz, C. Scheideler, and A. Setzer, <i>Provably Anonymous Communication Based on Trusted Execution Environments</i>. .","chicago":"Blömer, Johannes, Jan Bobolz, Christian Scheideler, and Alexander Setzer. <i>Provably Anonymous Communication Based on Trusted Execution Environments</i>, n.d."}}]