Picture of Julian Renner

Dr.-Ing. Dipl.-Ing. Julian Renner

Technical University of Munich

Associate Professorship of Coding and Cryptography (Prof. Wachter-Zeh)

Postal address

Postal:
Theresienstr. 90
80333 München

About

I’m a senior researcher in the group Coding and Cryptography (COD) at the Technical University of Munich (TUM), and I'm conducting research in the areas of post-quantum cryptography, applied coding theory, fiber-optic communication, sensing, and asset pricing in capital markets. 

Over the years, I have collaborated with more than 20 engineers, mathematicians, computer scientists, and economists who are from over 10 different countries. They were working in academia, in the industry, or at defense organizations. These collaborations led to more than 20 peer-reviewed conference papers, journal publications, and patents.

More detailed information about me can be found on my website.

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. My 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.

Publications

2022

  • Bartz, H.; Holzbaur, L.; Liu, H.; Puchinger, S.; Renner, J.; Wachter-Zeh, A.;: Rank-Metric Codes and Their Applications. Foundations and Trends in Communications and Information Theory, 2022 more… Full text ( DOI )
  • Puchinger, S.; Renner, J.; Rosenkilde, J.: Generic Decoding in the Sum-Rank Metric. IEEE Transactions on Information Theory, 2022 more… Full text ( DOI )

2021

  • Horlemann, A.; Puchinger, S.; Renner, J; Schamberger, T.; Wachter-Zeh, A.;: Information-Set Decoding with Hints. International Workshop on Code-Based Cryptography (CBCrytpo), 2021 more…
  • Puchinger, S.; Renner, J.; Wachter-Zeh, A.; Zumbrägel, J.: Efficient Decoding of Gabidulin Codes over Galois Rings. IEEE International Symposium on Information Theory (ISIT), 2021 more…
  • Renner, J., Puchinger, S., Wachter-Zeh, A.: LIGA: A Cryptosystem Based on the Hardness of Rank-Metric List and Interleaved Decoding. Designs, Codes, and Cryptography, 2021 more… Full text ( DOI )
  • Renner, J; Puchinger, S.; Wachter-Zeh, A.: Decoding High-Order Interleaved Rank-Metric Codes. IEEE International Symposium on Information Theory (ISIT), 2021 more…

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.; Neri, A.; Puchinger, S.: Low-Rank Parity-Check Codes over Galois Rings. Designs, Codes, and Cryptography , 2020 more… Full text ( DOI )
  • 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

  • Laghezza, F.; Renner, J.; Willems, F.; Serbetli, S.; Alvarado, A.: Radar Sensing. Patent application 16/402932, 2019 more…
  • 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 )