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109 Publications


2023 | Conference Paper | LibreCat-ID: 44855
S. Hemmrich, J. Bobolz, D. Beverungen, and J. Blömer, “Designing Business Reputation Ecosystems — A Method for Issuing and Trading Monetary Ratings on a Blockchain,” presented at the ECIS 2023, 2023.
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2023 | Conference Paper | LibreCat-ID: 35014 | OA
J. Blömer, J. Bobolz, and H. Bröcher, “On the impossibility of surviving (iterated) deletion of weakly dominated strategies in rational MPC,” presented at the TCC 2023, Taipeh, Taiwan, 2023.
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2023 | Conference Paper | LibreCat-ID: 43458 | OA
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.
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2022 | Dissertation | LibreCat-ID: 35188
F. Eidens, Privacy-Preserving Cryptography: Attribute-Based Signatures and Updatable Credentials. 2022.
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2021 | Preprint | LibreCat-ID: 26645 | OA
J. Bobolz, F. Eidens, R. Heitjohann, and J. Fell, “Cryptimeleon: A Library for Fast Prototyping of Privacy-Preserving Cryptographic Schemes.” IACR eprint, 2021.
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2021 | Conference Paper | LibreCat-ID: 29566
J. Bobolz, F. Eidens, S. Krenn, S. Ramacher, and K. Samelin, “Issuer-Hiding Attribute-Based Credentials,” 2021, doi: 10.1007/978-3-030-92548-2_9.
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2020 | Journal Article | LibreCat-ID: 20888
J. Blömer, S. Brauer, and K. Bujna, “A Complexity Theoretical Study of Fuzzy K-Means,” ACM Transactions on Algorithms, vol. 16, no. 4, pp. 1–25, 2020.
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2020 | Conference Paper | LibreCat-ID: 16487 | OA
J. Bobolz, F. Eidens, S. Krenn, D. Slamanig, and C. Striecks, “Privacy-Preserving Incentive Systems with Highly Efficient Point-Collection,” in Proceedings of the 15th ACM Asia Conference on Computer and Communications Security (ASIA CCS ’20), Taiwan, 2020.
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2020 | Journal Article | LibreCat-ID: 10790
J. Blömer, S. Brauer, K. Bujna, and D. Kuntze, “How well do SEM algorithms imitate EM algorithms? A non-asymptotic analysis for mixture models,” Advances in Data Analysis and Classification, vol. 14, pp. 147–173, 2020.
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2020 | Dissertation | LibreCat-ID: 15482
N. Löken, Cryptography for the Crowd — A Study of Cryptographic Schemes with Applications to Crowd Work. 2020.
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2019 | Journal Article | LibreCat-ID: 2916
S. Brauer, “Complexity of single-swap heuristics for metric facility location and related problems,” Theoretical Computer Science, vol. 754, pp. 88–106, 2019.
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2019 | Conference Paper | LibreCat-ID: 13554 | OA
J. Blömer and N. Löken, “Personal Cross-Platform Reputation,” in Security and Trust Management, STM 2019, 2019, vol. 11738.
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2019 | Conference Paper | LibreCat-ID: 13557 | OA
J. Blömer and N. Löken, “Dynamic Searchable Encryption with Access Control,” in 12th International Symposium on Foundations and Practice of Security, FPS 2019, 2019, vol. 12056.
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2019 | Dissertation | LibreCat-ID: 13679
S. Brauer, Classification and Approximation of Geometric Location Problems. Paderborn, 2019.
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2019 | Conference Paper | LibreCat-ID: 13904 | OA
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: 10.1145/3319535.3354223.
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2018 | Conference Paper | LibreCat-ID: 2862 | OA
J. Blömer, F. Eidens, and J. Juhnke, “Practical, Anonymous, and Publicly Linkable Universally-Composable Reputation Systems,” in Topics in Cryptology - {CT-RSA} 2018 - The Cryptographers’ Track at the {RSA} Conference 2018, Proceedings, San Francisco, CA, USA, 2018, pp. 470–490.
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2018 | Journal Article | LibreCat-ID: 2685
J. Blömer and K. Kohn, “Voronoi Cells of Lattices with Respect to Arbitrary Norms,” SIAM Journal on Applied Algebra and Geometry., vol. 2, no. 2, pp. 314–338, 2018.
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2018 | Conference Paper | LibreCat-ID: 3265 | OA
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.
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2018 | Conference Paper | LibreCat-ID: 2965
J. Blömer and N. Löken, “Cloud Architectures for Searchable Encryption,” in Proceedings of the 13th International Conference on Availability, Reliability and Security, ARES 2018, Hamburg, Germany, pp. 25:1--25:10.
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2018 | Working Paper | LibreCat-ID: 5820
J. Blömer, J. Bobolz, C. Scheideler, and A. Setzer, Provably Anonymous Communication Based on Trusted Execution Environments. .
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2018 | Conference Paper | LibreCat-ID: 4344
J. Blömer, S. Brauer, and K. Bujna, “Coresets for Fuzzy K-Means with Applications,” in 29th International Symposium on Algorithms and Computation  (ISAAC 2018), Jiaoxi, Yilan County, Taiwan, 2018, pp. 46:1--46:12.
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2018 | Dissertation | LibreCat-ID: 6597
J. Juhnke, Models and Constructions for Secure Reputation Systems. Universität Paderborn, 2018.
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2018 | Conference Paper | LibreCat-ID: 3873 | OA
J. Blömer, F. Eidens, and J. Juhnke, “Enhanced Security of Attribute-Based Signatures,” in The International Conference on Cryptology And Network Security (CANS), Naples, Italy, 2018, vol. 11124, pp. 235–255, doi: 10.1007/978-3-030-00434-7_12.
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2018 | Conference Paper | LibreCat-ID: 2379 | OA
J. Blömer and J. Bobolz, “Delegatable Attribute-based Anonymous Credentials from Dynamically Malleable Signatures,” presented at the The 16th International Conference on Applied Cryptography and Network Security, Leuven, Belgium, doi: 10.1007/978-3-319-93387-0_12.
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2017 | Dissertation | LibreCat-ID: 2908
K. Bujna, Soft Clustering Algorithms - Theoretical and Practical Improvements. Universität Paderborn, 2017.
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2017 | Conference Paper | LibreCat-ID: 2967 | OA
J. Blömer and G. Liske, “Subtleties in Security Definitions for Predicate Encryption with Public Index,” in Proceedings of the International Conference of Mathematical Aspects of Computer and Information Sciences (MACIS), 2017, vol. 10693, pp. 438–453.
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2017 | Dissertation | LibreCat-ID: 116
G. Liske, CCA-Security for Predicate Encryption Schemes. Universität Paderborn, 2017.
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2017 | Conference Paper | LibreCat-ID: 2343 | OA
N. Löken, “Searchable Encryption with Access Control,” in Proceedings of the 12th International Conference on Availability, Reliability and Security  - ARES ’17, 2017.
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2017 | Conference Paper | LibreCat-ID: 2344 | OA
J. Blömer, P. Günther, V. Krummel, and N. Löken, “Attribute-Based Encryption as a Service for Access Control in Large-Scale Organizations,” in Foundations and Practice of Security, 2017, pp. 3–17.
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2017 | Book Chapter | LibreCat-ID: 2381
S. Brauer, “Complexity of Single-Swap Heuristics for Metric Facility Location and Related Problems,” in Lecture Notes in Computer Science, vol. 10236, D. Fotakis, A. Pagourtzis, and V. T. Paschos, Eds. Cham: Springer International Publishing, 2017, pp. 116–127.
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2016 | Conference Paper | LibreCat-ID: 2947
J. Blömer and P. Günther, “Singular Curve Point Decompression Attack,” in 2015 Workshop on Fault Diagnosis and Tolerance in Cryptography (FDTC), 2016.
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2016 | Book Chapter | LibreCat-ID: 2948
P. Günther and V. Krummel, “Implementing Cryptographic Pairings on Accumulator Based Smart Card Architectures,” in Mathematical Aspects of Computer and Information Sciences, Cham: Springer International Publishing, 2016, pp. 151–165.
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2016 | Book Chapter | LibreCat-ID: 2968
J. Blömer, C. Lammersen, M. Schmidt, and C. Sohler, “Theoretical Analysis of the k-Means Algorithm – A Survey,” in Algorithm Engineering, Cham: Springer International Publishing, 2016, pp. 81–116.
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2016 | Preprint | LibreCat-ID: 2969 | OA
J. Blömer, S. Brauer, and K. Bujna, “Hard-Clustering with Gaussian Mixture Models.” Computing Research Repository, 2016.
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2016 | Book Chapter | LibreCat-ID: 2970
J. Blömer and K. Bujna, “Adaptive Seeding for Gaussian Mixture Models,” in Advances in Knowledge Discovery and Data Mining, Cham: Springer International Publishing, 2016, pp. 296–308.
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2016 | Report | LibreCat-ID: 2971
J. Blömer and P. Günther, Effizienz und Sicherheit paarungsbasierter Kryptographie. Tagungsband des 26. Fraunhofer SIT Smartcard-Workshops, 2016.
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2016 | Conference Paper | LibreCat-ID: 2367
J. Blömer, S. Brauer, and K. Bujna, “A Theoretical Analysis of the Fuzzy K-Means Problem,” in 2016 IEEE 16th International Conference on Data Mining (ICDM), Barcelona, Spain, 2016, pp. 805–810.
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2016 | Conference Paper | LibreCat-ID: 208
J. Blömer and G. Liske, “Construction of Fully CCA-Secure Predicate Encryptions from Pair Encoding Schemes,” in Proceedings of the CT-RSA 2016, 2016, pp. 431–447.
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2016 | Dissertation | LibreCat-ID: 167
P. Günther, Physical attacks on pairing-based cryptography. Universität Paderborn, 2016.
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2016 | Book Chapter | LibreCat-ID: 2978
J. Blömer and K. Bujna, “Adaptive Seeding for Gaussian Mixture Models,” in Advances in Knowledge Discovery and Data Mining, Cham: Springer International Publishing, 2016, pp. 296–308.
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2015 | Conference Paper | LibreCat-ID: 253
J. Blömer, J. Juhnke, and N. Löken, “Short Group Signatures with Distributed Traceability,” in Proceedings of the Sixth International Conference on Mathematical Aspects of Computer and Information Sciences (MACIS), 2015, pp. 166–180.
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2015 | Conference Paper | LibreCat-ID: 322 | OA
J. Blömer, J. Juhnke, and C. Kolb, “Anonymous and Publicly Linkable Reputation Systems,” in Proceedings of the 18th International Conference on Financial Cryptography and Data Security (FC), 2015, pp. 478--488.
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2015 | Report | LibreCat-ID: 233 | OA
J. Blömer and K. Kohn, Voronoi Cells of Lattices with Respect to Arbitrary Norms. Universität Paderborn, 2015.
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2014 | Conference Paper | LibreCat-ID: 355
J. Blömer, P. Günther, and G. Liske, “Tampering attacks in pairing-based cryptography,” in Proceedings of Fault Tolerance and Diagnosis in Cryptography(FDTC), 2014, pp. 1--7.
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2014 | Journal Article | LibreCat-ID: 2976
M. R. Ackermann, J. Blömer, D. Kuntze, and C. Sohler, “Analysis of Agglomerative Clustering,” Algorithmica, vol. 69, 2014.
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2014 | Conference Paper | LibreCat-ID: 2977
J. Blömer, K. Bujna, and D. Kuntze, “A Theoretical and Experimental Comparison of the EM and SEM Algorithm,” in 2014 22nd International Conference on Pattern Recognition, 2014.
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2014 | Preprint | LibreCat-ID: 442 | OA
J. Blömer and G. Liske, “Constructing CCA-secure predicate encapsulation schemes from CPA-secure schemes and universal one-way hash functions.” Universität Paderborn, 2014.
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2014 | Conference Paper | LibreCat-ID: 463
J. Blömer, R. Gomes da Silva, P. Günther, J. Krämer, and J.-P. Seifert, “A Practical Second-Order Fault Attack against a Real-World Pairing Implementation,” in Proceedings of Fault Tolerance and Diagnosis in Cryptography(FDTC), 2014, pp. 123--136.
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2013 | Dissertation | LibreCat-ID: 2909
D. Kuntze, Practical algorithms for clustering and modeling large data sets - Analysis and improvements. Universität Paderborn, 2013.
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2013 | Report | LibreCat-ID: 2917
J. Juhnke, H. Lefmann, and V. Strehl, An Approach for Determining Optimal Contrast in Visual Cryptography. Fortschritt-Berichte VDI, 2013.
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