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:
Resources related to my publications:
- 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
- A degree bound for planar functions
[pdf]
Christof Beierle and Tim Beyne
ArXiv
- Ultrametric integral cryptanalysis
[doi]
[eprint]
Tim Beyne and Michiel Verbauwhede
Asiacrypt 2024
- Information-theoretic security with asymmetries
[doi]
[eprint]
Tim Beyne and Yu Long Chen
Crypto 2024
- Note on the cryptanalysis of Speedy
[eprint]
Tim Beyne and Addie Neyt
IACR ePrint archive 2024
- Multidimensional linear cryptanalysis of Feistel ciphers
[doi]
Betül Aşkın Özdemir, Tim Beyne and Vincent Rijmen
IACR Transactions on Symmetric Cryptology 2023
- Integral cryptanalysis using algebraic transition matrices
[doi]
[code]
Tim Beyne and Michiel Verbauwhede
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
- Provably secure reflection ciphers
[doi]
[eprint]
Tim Beyne and Yu Long Chen
Crypto 2022
- Truncated differential attacks on contracting Feistel ciphers
[doi]
[code]
Tim Beyne and Yunwen Liu
IACR Transactions on Symmetric Cryptology 2022
- Cryptanalysis of efficient masked ciphers: applications to low latency
[doi]
Tim Beyne, Siemen Dhooghe, Amir Moradi and Aein Rezaei Shahmirzadi
IACR Transactions on Cryptographic Hardware and Embedded Systems 2022
- Multi-user security of the Elephant v2 authenticated encryption mode
[doi]
Tim Beyne, Yu Long Chen, Christoph Dobraunig and Bart Mennink
SAC 2021
- A geometric approach to linear cryptanalysis
[doi]
[eprint]
[supplements]
Tim Beyne
Asiacrypt 2021
(best student paper)
- A low-randomness second-order masked AES
[doi]
[eprint]
Tim Beyne, Siemen Dhooghe, Adrián Ranea and Danilo Šijačić
SAC 2021
- 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
- Cryptanalysis of masked ciphers: a not so random idea
[doi]
[eprint]
Tim Beyne, Siemen Dhooghe and Zhenda Zhang
Asiacrypt 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
- Dumbo, Jumbo and Delirium: parallel authenticated encryption for the lightweight circus
[doi]
Tim Beyne, Yu Long Chen, Christoph Dobraunig and Bart Mennink
IACR Transactions on Symmetric Cryptology 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
- Cryptanalysis of the Legendre PRF and generalizations
[doi]
[eprint]
Ward Beullens, Tim Beyne, Aleksei Udovenko and Giuseppe Vitto
IACR Transactions on Symmetric Cryptology 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
- Elephant
[pdf]
Tim Beyne, Yu Long Chen, Christoph Dobraunig and Bart Mennink
Submission to the NIST lightweight cryptography project
(finalist)
- 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
- Uniform first-order threshold implementations
[doi]
[eprint]
Tim Beyne and Begül Bilgin
SAC 2016