Picture of Julian Renner

Dipl.-Ing. Julian Renner

Technical University of Munich

Assistant Professorship of Coding for Communications and Data Storage (Prof. Wachter-Zeh)

Postal address

Postal:
Theresienstr. 90
80333 München

Biography

Julian Renner was born in Eggenfelden, Germany. He received the B.Sc. and M.Sc. degree (with high distinction) in electrical engineering from the Technische Universität München (TUM), München, Germany, in 2014 and 2016, respectively. In his Master’s Thesis, he worked on probabilistic shaping for the nonlinear fiber channel in a joint research project of the Institute for Communications Engineering, TUM, and the Coding and Visual Communication Group, Department of Photonics Engineering, Technical University of Denmark (DTU), Denmark. From February 2017 to October 2017, he conducted analytic- and simulation-based research in the field of waveform design for joint automotive radar and V2X communication at the Signal Processing Systems (SPS) Group, Department of Electrical Engineering, Eindhoven University of Technology (TU/e), Netherlands. Since November 2017, he is pursuing the Dr.-Ing. degree in the area of post-quantum cryptography at the Coding for Communications and Data Storage (COD) group, TUM.

Research

Assuming a cyber attack initiated from a sufficiently powerful quantum computer, several classical public-key algorithms become insecure.  These algorithms are based on factoring large integers and the discrete logarithm problem which are easy-to-solve in a post-quantum world. Thus, the National Institute of Standards and Technology (NIST) launched the Post-Quantum Cryptography Standardization. Julian Renner's research focuses on assessing the hardness of mathematical problems that can serve as the core to such cryptosystems, analysing the security of existing schemes and constructing new efficient public-key algorithms in the context of post-quantum cryptography.

Theses in Progress

Publications

2020

  • Kunz, J.; Renner, J.; Maringer, G.; Schamberger, T.; Wachter-Zeh, A.: On Software Implementation of Gabidulin Decoders. Seventeenth International Workshop on Algebraic and Combinatorial Coding Theory (ACCT2020), 2020 more…
  • Lavauzelle, J.; Renner, J.: Cryptanalysis of a system based on twisted Reed–Solomon codes. Designs, Codes, and Cryptography, 2020 more… Full text ( DOI )
  • Puchinger, S.; Renner, J.; Rosenkilde, J.: Generic Decoding in the Sum-Rank Metric. IEEE Int. Symp. Inform. Theory (ISIT), 2020 more…
  • Renner, J.: An Algorithm for Solving the Search Gabidulin Problem and its Application to Cryptograhpy. 2020 more…
  • Renner, J.: Randomized Decoding of Gabidulin Codes Beyond the Unique Decoding Radius. International Workshop on Code-Based Cryptography (CBCrypto), 2020 more…
  • Renner, J.; Jerkovits, T.; Bartz, H.; Puchinger, S.; Loidreau, P.; Wachter-Zeh, A.: Randomized Decoding of Gabidulin Codes Beyond the Unique Decoding Radius. The Eleventh International Conference on Post-Quantum Cryptography (PQCrytpo), 2020 more…
  • Renner, J.; Puchinger, S.; Wachter-Zeh, A.; Hollanti, C.; Freij-Holanti, R.: Low-Rank Parity-Check Codes over the Ring of Integers Modulo a Prime Power. IEEE Int. Symp. Inform. Theory (ISIT), 2020 more…
  • Schamberger, T.; Renner, J.; Sigl, G.; Wachter-Zeh A.: A Power Side-Channel Attack on the CCA2-Secure HQC KEM. 19th Smart Card Research and Advanced Application Conference (CARDIS2020), 2020 more…

2019

  • Puchinger, S., Renner, J., Wachter-Zeh, A.: Decoding High-Order Interleaved Rank-Metric Codes. 19th Joint Workshop on Communications and Coding (JWCC), 2019 more…
  • Renner, J., Jerkovits, T., Bartz, H.: Efficient Decoding of Interleaved Low-Rank Parity-Check Codes. XVI International Symposium "Problems of Redundancy in Information and Control Systems", 2019 more…
  • Renner, J., Puchinger, S., Wachter-Zeh, A.: Generic Decoding of Interleaved Rank-Metric Codes. Munich Workshop on Coding and Cryptography (MWCC) 2019 more…
  • Renner, J., Puchinger, S., Wachter-Zeh, A.: Generic Decoding of Interleaved Rank-Metric Codes. Munich Doctoral Seminar on Communications 2019 more…
  • Renner, J., Puchinger, S., Wachter-Zeh, A.: Twisted Codes in Rank Based Cryptography. Munich Doctoral Seminar on Communications, 2019 more…
  • Renner, J., Puchinger, S., Wachter-Zeh, A.: Interleaving Loidreau’s Rank-Metric Cryptosystem. XVI International Symposium "Problems of Redundancy in Information and Control Systems", 2019 more…
  • Renner, J., Puchinger, S., Wachter-Zeh, A.: Decreasing Key Sizes of a Rank-Metric Based Cryptosystem. Workshop on Coding, Cooperation, and Security in Modern Communication Networks, 2019 more…
  • Renner, J., Puchinger, S., Wachter-Zeh, A.: Key Compression for Rank-Based Cryptosystems. DTU Algebra Group Colloquium, 2019 more…
  • Renner, J., Puchinger, S., Wachter-Zeh, A.: On a Rank-Metric Code-Based Cryptosystem with Small Key Size. 19th Joint Workshop on Communications and Coding (JWCC), 2019 more…
  • Welter, L.; Renner, J.; Wachter-Zeh, A.: Coding Theory for DNA Storage and Cryptography. IAS General Assembly 2019, 2019 more…

2018

  • Puchinger, S.; Renner, J.; Wachter-Zeh, A.: Twisted Gabidulin Codes in the GPT Cryptosystem. Sixteenth International Workshop on Algebraic and Combinatorial Coding Theory (ACCT), 2018 more…
  • Renner, J.: Datensicherheit im Zeitalter von Quantencomputern. TUM Tag der offenen Tür, 2018 more…
  • Renner, J.: Reparation of a Rank-Metric Public-Key Cryptosystem with Small Key Size. DLR/TUM/UUlm Workshop on Coding and Cryptography, 2018 more…
  • Renner, J.: Rank-Metric Public-Key Cryptosystems. Cryptography Seminar of Rennes, 2018 more…
  • Wachter-Zeh, A.; Puchinger, S.; Renner, J.: Repairing the Faure-Loidreau Public-Key Cryptosystem. IEEE Int. Symp. Inform. Theory (ISIT), 2018 more…

2017

  • Renner, J.; Fehenberger, T.; Yankov, P.; Da Ros, F.; Forchhammer, S.; Böcherer, G; Hanik, N.: Experimental Comparison of Probabilistic Shaping Methods for Unrepeated Fiber Transmission. IEEE/OSA Journal of Lightwave Technology 35 (22), 2017 more… Full text ( DOI )

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