Tim Beyne

I am a postdoctoral researcher at KU Leuven, in the COSIC group. I defended my PhD thesis `A geometric approach to symmetric-key cryptanalysis’ in June 2023. My promotor was Vincent Rijmen. Contact information:

• name.lastname@esat.kuleuven.be
• Public key for PGP.

Resources related to my publications under 'cryptanalysis':

• Exponential sums in linear cryptanalysis [eprint]
  Tim Beyne and Clémence Bouvier
  IACR ePrint archive 2024


• Linear approximations of the Flystel construction [eprint]
  Tim Beyne and Clémence Bouvier
  IACR ePrint archive 2024


• Ultrametric integral cryptanalysis [doi] [eprint]
  Tim Beyne and Michiel Verbauwhede
  Asiacrypt 2024


• Note on the cryptanalysis of Speedy [eprint]
  Tim Beyne and Addie Neyt
  IACR ePrint archive 2024


• Integral cryptanalysis using algebraic transition matrices [doi] [code]
  Tim Beyne and Michiel Verbauwhede
  IACR Transactions on Symmetric Cryptology 2023


• Multidimensional linear cryptanalysis of Feistel ciphers [doi]
  Betül Aşkın Özdemir, Tim Beyne and Vincent Rijmen
  IACR Transactions on Symmetric Cryptology 2023


• An invariant of the round function of QARMAv2-64 [eprint]
  Tim Beyne
  IACR ePrint archive 2023


• A geometric approach to symmetric-key cryptanalysis [pdf]
  Tim Beyne
  PhD thesis


• Constructing and deconstructing intentional weaknesses in symmetric ciphers [doi] [eprint]
  Christof Beierle, Tim Beyne, Patrick Felke and Gregor Leander
  Crypto 2022


• Differential cryptanalysis in the fixed-key model [doi] [eprint] [code]
  Tim Beyne and Vincent Rijmen
  Crypto 2022


• Truncated differential attacks on contracting Feistel ciphers [doi] [code]
  Tim Beyne and Yunwen Liu
  IACR Transactions on Symmetric Cryptology 2022


• A geometric approach to linear cryptanalysis [doi] [eprint] [supplements]
  Tim Beyne
  Asiacrypt 2021 (best student paper)


• Linear cryptanalysis of FF3-1 and FEA [doi] [eprint] [supplements]
  Tim Beyne
  Crypto 2021 (early career researcher award and honorable mention best paper)


• Cryptanalysis of the MALICIOUS framework [eprint]
  Tim Beyne and Chaoyun Li
  IACR ePrint archive 2020


• Report on the security of the Rescue hash function [eprint]
  Tim Beyne, Anne Canteaut, Gregor Leander, María Naya-Plasencia, Léo Perrin and Friedrich Wiemer
  IACR ePrint archive 2020


• Report on the security of STARK-friendly hash functions (version 2.0)
  Anne Canteaut, Tim Beyne, Itai Dinur, Maria Eichlseder, Gregor Leander, Gaëtan Leurent, María Naya-Plasencia, Léo Perrin, Yu Sasaki, Yosuke Todo and Friedrich Wiemer
  StarkWare hash function selection committee report


• Out of oddity – new cryptanalytic techniques against symmetric primitives optimized for integrity proof systems [doi] [eprint]
  Tim Beyne, Anne Canteaut, Itai Dinur, Maria Eichlseder, Gregor Leander, Gaëtan Leurent, María Naya-Plasencia, Léo Perrin, Yu Sasaki, Yosuke Todo and Friedrich Wiemer
  Crypto 2020


• Block cipher invariants as eigenvectors of correlation matrices (full version) [doi] [eprint]
  Tim Beyne
  Journal of Cryptology 33 (invited version of Asiacrypt 2018 paper)


• Linear cryptanalysis in the weak key model [supplements]
  Tim Beyne
  Master's thesis


• Block cipher invariants as eigenvectors of correlation matrices [doi] [eprint] [supplements]
  Tim Beyne
  Asiacrypt 2018 (best paper)


• Revisiting the wrong-key-randomization hypothesis [doi] [eprint]
  Tomer Ashur and Tim Beyne
  Journal of Cryptology 33