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109 Publications


2020 | Journal Article | LibreCat-ID: 20888
Blömer, Johannes, Sascha Brauer, and Kathrin Bujna. “A Complexity Theoretical Study of Fuzzy K-Means.” ACM Transactions on Algorithms 16, no. 4 (2020): 1–25. https://doi.org/10.1145/3409385.
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2004 | Book Chapter | LibreCat-ID: 3012
Blömer, Johannes, and Alexander May. “A Generalized Wiener Attack on RSA.” In Public Key Cryptography – PKC 2004, 1–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. https://doi.org/10.1007/978-3-540-24632-9_1.
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2023 | Conference Paper | LibreCat-ID: 43458 | OA
Blömer, Johannes, Jan Bobolz, and Laurens Alexander Porzenheim. “A Generic Construction of an Anonymous Reputation System and Instantiations from Lattices,” 2023.
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1998 | Journal Article | LibreCat-ID: 3028
Blömer, Johannes, and Beat Trachsler. “A Lower Bound for a Class of Graph Based Loss Resilient Codes.” Technical Report/Departement of Computer Science, ETH Zürich, 1998.
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2004 | Conference Paper | LibreCat-ID: 3017
Blömer, Johannes, Martin Otto, and Jean-Pierre Seifert. “A New CRT-RSA Algorithm Secure against Bellcore Attacks.” In Proceedings of the 10th ACM Conference on Computer and Communication Security  - CCS ’03. ACM Press, 2004. https://doi.org/10.1145/948109.948151.
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2014 | Conference Paper | LibreCat-ID: 463
Blömer, Johannes, Ricardo Gomes da Silva, Peter Günther, Juliane Krämer, and Jean-Pierre Seifert. “A Practical Second-Order Fault Attack against a Real-World Pairing Implementation.” In Proceedings of Fault Tolerance and Diagnosis in Cryptography(FDTC), 123--136, 2014. https://doi.org/10.1109/FDTC.2014.22.
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2007 | Book Chapter | LibreCat-ID: 3026
Blömer, Johannes. “A Probabilistic Zero-Test for Expressions Involving Roots of Rational Numbers.” In Algorithms — ESA’ 98, 151–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. https://doi.org/10.1007/3-540-68530-8_13.
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2016 | Conference Paper | LibreCat-ID: 2367
Blömer, Johannes, Sascha Brauer, and Kathrin Bujna. “A Theoretical Analysis of the Fuzzy K-Means Problem.” In 2016 IEEE 16th International Conference on Data Mining (ICDM), 805–10. IEEE, 2016. https://doi.org/10.1109/icdm.2016.0094.
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2014 | Conference Paper | LibreCat-ID: 2977
Blömer, Johannes, Kathrin Bujna, and Daniel Kuntze. “A Theoretical and Experimental Comparison of the EM and SEM Algorithm.” In 2014 22nd International Conference on Pattern Recognition. IEEE, 2014. https://doi.org/10.1109/icpr.2014.253.
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2005 | Book Chapter | LibreCat-ID: 3006
Blömer, Johannes, and Alexander May. “A Tool Kit for Finding Small Roots of Bivariate Polynomials over the Integers.” In EUROCRYPT 2005, 251–67. Lecture Notes in Computer Science. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. https://doi.org/10.1007/11426639_15.
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2016 | Book Chapter | LibreCat-ID: 2970
Blömer, Johannes, and Kathrin Bujna. “Adaptive Seeding for Gaussian Mixture Models.” In Advances in Knowledge Discovery and Data Mining, 296–308. Cham: Springer International Publishing, 2016. https://doi.org/10.1007/978-3-319-31750-2_24.
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2016 | Book Chapter | LibreCat-ID: 2978
Blömer, Johannes, and Kathrin Bujna. “Adaptive Seeding for Gaussian Mixture Models.” In Advances in Knowledge Discovery and Data Mining, 296–308. Cham: Springer International Publishing, 2016. https://doi.org/10.1007/978-3-319-31750-2_24.
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2011 | Dissertation | LibreCat-ID: 2910
Naewe, Stefanie. Algorithms for Lattice Problems with Respect to General Norms. Universität Paderborn, 2011.
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2009 | Dissertation | LibreCat-ID: 2911
Ackermann, Marcel Rudolf. Algorithms for the Bregman K-Median Problem. Universität Paderborn, 2009.
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2013 | Report | LibreCat-ID: 2917
Juhnke, Jakob, Hanno Lefmann, and Volker Strehl. An Approach for Determining Optimal Contrast in Visual Cryptography. Fortschritt-Berichte VDI, 2013.
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1995 | Report | LibreCat-ID: 3038
Blömer, Johannes, Malik Kalfane, Richard Karp, Marek Karpinski, Michael Luby, and David Zuckerman. An XOR-Based Erasure-Resilient Coding Scheme. Technical Report, International Computer Science Institute. Berkeley, USA, 1995.
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2014 | Journal Article | LibreCat-ID: 2976
Ackermann, Marcel Rudolf, Johannes Blömer, Daniel Kuntze, and Christian Sohler. “Analysis of Agglomerative Clustering.” Algorithmica 69 (2014). https://doi.org/10.1007/s00453-012-9717-4.
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2007 | Book Chapter | LibreCat-ID: 3002 | OA
Blömer, Johannes, and Volker Krummel. “Analysis of Countermeasures Against Access Driven Cache Attacks on AES.” In Selected Areas in Cryptography, 96–109. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. https://doi.org/10.1007/978-3-540-77360-3_7.
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2015 | Conference Paper | LibreCat-ID: 322 | OA
Blömer, Johannes, Jakob Juhnke, and Christina Kolb. “Anonymous and Publicly Linkable Reputation Systems.” In Proceedings of the 18th International Conference on Financial Cryptography and Data Security (FC), 478--488. LNCS, 2015. https://doi.org/10.1007/978-3-662-47854-7_29.
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1995 | Journal Article | LibreCat-ID: 3037
Alt, Helmut, Bernd Behrends, and Johannes Blömer. “Approximate Matching of Polygonal Shapes.” Annals of Mathematics and Artificial Intelligence 13, no. 3 (1995).
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1991 | Conference Paper | LibreCat-ID: 3048
Alt, Helmut, Bernd Behrends, and Johannes Blömer. “Approximate Matching of Polygonal Shapes (Extended Abstract).” In Proceedings of the Seventh Annual Symposium on Computational Geometry  - SCG ’91. ACM Press, 1991. https://doi.org/10.1145/109648.109669.
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1990 | Book Chapter | LibreCat-ID: 3050
Alt, Helmut, Johannes Blömer, and Hubert Wagener. “Approximation of Convex Polygons.” In Automata, Languages and Programming, 703–16. Berlin/Heidelberg: Springer-Verlag, 1990. https://doi.org/10.1007/bfb0032068.
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2017 | Conference Paper | LibreCat-ID: 2344 | OA
Blömer, Johannes, Peter Günther, Volker Krummel, and Nils Löken. “Attribute-Based Encryption as a Service for Access Control in Large-Scale Organizations.” In Foundations and Practice of Security, 3–17. Cham: Springer International Publishing, 2017. https://doi.org/10.1007/978-3-319-75650-9_1.
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2010 | Book Chapter | LibreCat-ID: 2988
Ackermann, Marcel R., and Johannes Blömer. “Bregman Clustering for Separable Instances.” In SWAT 2010, 212–23. Lecture Notes in Computer Science. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. https://doi.org/10.1007/978-3-642-13731-0_21.
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2017 | Dissertation | LibreCat-ID: 116
Liske, Gennadij. CCA-Security for Predicate Encryption Schemes. Universität Paderborn, 2017. https://doi.org/10.17619/UNIPB/1-220.
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2019 | Dissertation | LibreCat-ID: 13679
Brauer, Sascha. Classification and Approximation of Geometric Location Problems. Paderborn, 2019. https://doi.org/10.17619/UNIPB/1-816.
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2000 | Book Chapter | LibreCat-ID: 3023
Blömer, Johannes. “Closest Vectors, Successive Minima, and Dual HKZ-Bases of Lattices.” In Automata, Languages and Programming, 248–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. https://doi.org/10.1007/3-540-45022-x_22.
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2018 | Conference Paper | LibreCat-ID: 2965
Blömer, Johannes, and Nils Löken. “Cloud Architectures for Searchable Encryption.” In Proceedings of the 13th International Conference on Availability, Reliability and Security, ARES 2018, 25:1--25:10. New York, NY, USA: ACM, n.d. https://doi.org/10.1145/3230833.3230853.
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2010 | Journal Article | LibreCat-ID: 2990
Ackermann, Marcel R., Johannes Blömer, and Christian Sohler. “Clustering for Metric and Nonmetric Distance Measures.” ACM Trans. Algorithms, no. 4 (2010): 59:1--59:26. https://doi.org/10.1145/1824777.1824779.
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2019 | Journal Article | LibreCat-ID: 2916
Brauer, Sascha. “Complexity of Single-Swap Heuristics for Metric Facility Location and Related Problems.” Theoretical Computer Science 754 (2019): 88–106. https://doi.org/10.1016/j.tcs.2018.04.048.
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2017 | Book Chapter | LibreCat-ID: 2381
Brauer, Sascha. “Complexity of Single-Swap Heuristics for Metric Facility Location and Related Problems.” In Lecture Notes in Computer Science, edited by Dimitris Fotakis, Aris Pagourtzis, and Vangelis Th. Paschos, 10236:116–27. Cham: Springer International Publishing, 2017. https://doi.org/10.1007/978-3-319-57586-5_11.
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1991 | Conference Paper | LibreCat-ID: 3049
Blömer, Johannes. “Computing Sums of Radicals in Polynomial Time.” In Proceedings 32nd Annual Symposium of Foundations of Computer Science. IEEE Comput. Soc. Press, 1991. https://doi.org/10.1109/sfcs.1991.185434.
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2002 | Conference Paper | LibreCat-ID: 3041
Blömer, Johannes. “Computing Sums of Radicals in Polynomial Time.” In [1991] Proceedings 32nd Annual Symposium of Foundations of Computer Science. IEEE Comput. Soc. Press, 2002. https://doi.org/10.1109/sfcs.1991.185434.
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2004 | Book Chapter | LibreCat-ID: 3015
May, Alexander. “Computing the RSA Secret Key Is Deterministic Polynomial Time Equivalent to Factoring.” In Advances in Cryptology – CRYPTO 2004, 213–19. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. https://doi.org/10.1007/978-3-540-28628-8_13.
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2014 | Preprint | LibreCat-ID: 442 | OA
Blömer, Johannes, and Gennadij Liske. “Constructing CCA-Secure Predicate Encapsulation Schemes from CPA-Secure Schemes and Universal One-Way Hash Functions.” Universität Paderborn, 2014.
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2016 | Conference Paper | LibreCat-ID: 208
Blömer, Johannes, and Gennadij Liske. “Construction of Fully CCA-Secure Predicate Encryptions from Pair Encoding Schemes.” In Proceedings of the CT-RSA 2016, 431–47. LNCS, 2016. https://doi.org/10.1007/978-3-319-29485-8_25.
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2009 | Book Chapter | LibreCat-ID: 2995
Ackermann, Marcel R., and Johannes Blömer. “Coresets and Approximate Clustering for Bregman Divergences.” In Proceedings of the Twentieth Annual ACM-SIAM Symposium on Discrete Algorithms, 1088–97. Philadelphia, PA: Society for Industrial and Applied Mathematics, 2009. https://doi.org/10.1137/1.9781611973068.118.
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2018 | Conference Paper | LibreCat-ID: 4344
Blömer, Johannes, Sascha Brauer, and Kathrin Bujna. “Coresets for Fuzzy K-Means with Applications.” In 29th International Symposium on Algorithms and Computation  (ISAAC 2018), 46:1--46:12. Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik, 2018. https://doi.org/10.4230/LIPIcs.ISAAC.2018.46.
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2007 | Book Chapter | LibreCat-ID: 3019
May, Alexander. “Cryptanalysis of Unbalanced RSA with Small CRT-Exponent.” In Advances in Cryptology — CRYPTO 2002, 242–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. https://doi.org/10.1007/3-540-45708-9_16.
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2021 | Preprint | LibreCat-ID: 26645 | OA
Bobolz, Jan, Fabian Eidens, Raphael Heitjohann, and Jeremy Fell. “Cryptimeleon: A Library for Fast Prototyping of Privacy-Preserving Cryptographic Schemes.” IACR eprint, 2021.
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2020 | Dissertation | LibreCat-ID: 15482
Löken, Nils. Cryptography for the Crowd — A Study of Cryptographic Schemes with Applications to Crowd Work, 2020. https://doi.org/10.17619/UNIPB/1-854.
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2018 | Conference Paper | LibreCat-ID: 2379 | OA
Blömer, Johannes, and Jan Bobolz. “Delegatable Attribute-Based Anonymous Credentials from Dynamically Malleable Signatures.” In ACNS 2018 Applied Cryptography & Network Security. LNCS, n.d. https://doi.org/10.1007/978-3-319-93387-0_12.
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1997 | Book Chapter | LibreCat-ID: 3029
Blömer, Johannes. “Denesting by Bounded Degree Radicals.” In Algorithms — ESA ’97, 53–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. https://doi.org/10.1007/3-540-63397-9_5.
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2002 | Journal Article | LibreCat-ID: 35857
Blömer, J. “Denesting by Bounded Degree Radicals.” Algorithmica 28, no. 1 (2002): 2–15. https://doi.org/10.1007/s004530010028.
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2023 | Conference Paper | LibreCat-ID: 44855
Hemmrich, Simon, Jan Bobolz, Daniel Beverungen, and Johannes Blömer. “Designing Business Reputation Ecosystems — A Method for Issuing and Trading Monetary Ratings on a Blockchain.” In ECIS 2023 Research Papers, 2023.
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2007 | Book Chapter | LibreCat-ID: 3022
May, Alexander, and Joseph H. Silverman. “Dimension Reduction Methods for Convolution Modular Lattices.” In Lecture Notes in Computer Science, 110–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. https://doi.org/10.1007/3-540-44670-2_10.
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2013 | Preprint | LibreCat-ID: 538 | OA
Blömer, Johannes, and Gennadij Liske. “Direct Chosen-Ciphertext Secure Attribute-Based Key Encapsulations without Random Oracles.” Universität Paderborn, 2013.
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2019 | Conference Paper | LibreCat-ID: 13557 | OA
Blömer, Johannes, and Nils Löken. “Dynamic Searchable Encryption with Access Control.” In 12th International Symposium on Foundations and Practice of Security, FPS 2019, Vol. 12056. LNCS. Springer, 2019.
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2010 | Conference Paper | LibreCat-ID: 2993
Schrieb, Jonas. “Efficient and Compact CCA Security from Partitioned IBKEM.” Proceedings of the 3rd Western European Workshop on Research in Cryptology, 2010.
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2016 | Report | LibreCat-ID: 2971
Blömer, Johannes, and Peter Günther. Effizienz Und Sicherheit Paarungsbasierter Kryptographie. Tagungsband des 26. Fraunhofer SIT Smartcard-Workshops, 2016.
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