Research

I work on symmetric cryptography and discrete mathematics. During my first years of PhD, I mainly cryptanalyzed symmetric primitives, especially lightweight ones, such as $\mathsf{Ascon}$ (winner of the NIST lightweight competition) or $\mathsf{Midori}$. More recently, I started studying Boolean functions, and more specifically their cryptographic properties such as APN-ness (Almost Perfect Non-linear functions). I also take part in the design of new primitives either for new use cases or focused on extreme performances.

Publications

You can find below a list¹ of my published articles that I update from time to time. Alternatively, you can find them on Google Scholar or DBLP.

Journal articles

1. Commutative Cryptanalysis as a Generalization of Differential Cryptanalysis. Jules Baudrin, Christof Beierle, Patrick Felke, Gregor Leander, Patrick Neumann, Léo Perrin, and Lukas Stennes. Designs, Codes and Cryptography. (2025).
   eprint

   • @article{SELF:EPRINT:BBFLNPS24,
       keywords = {journal,eprint},
       title = {Commutative Cryptanalysis as a Generalization of
       Differential Cryptanalysis},
       author = {Baudrin, Jules and Beierle, Christof and Felke, Patrick and Leander, Gregor and Neumann, Patrick and Perrin, Léo and Stennes, Lukas},
       publisher = {Springer},
       journal = {Designs, Codes and Cryptography},
       year = {2025},
       month = oct,
       note = {Accepted},
       url = {https://eprint.iacr.org/2024/1678}
     }
     

2. Fast AES-Based Universal Hash Functions and MACs: featuring LeMac and PetitMac. Augustin Bariant, Jules Baudrin, Gaëtan Leurent, Clara Pernot, Léo Perrin, and Thomas Peyrin. IACR Transactions on Symmetric Cryptology. (2024). 10.46586/tosc.v2024.i2.35-67
   hal
   git

   • @article{SELF:ToSC:BBLPPP24,
       keywords = {journal},
       author = {Bariant, Augustin and Baudrin, Jules and Leurent, Gaëtan and Pernot, Clara and Perrin, Léo and Peyrin, Thomas},
       title = {{F}ast {AES}-Based Universal Hash Functions and {MAC}s: featuring {LeMac} and {PetitMac}},
       volume = {2024},
       url = {https://tosc.iacr.org/index.php/ToSC/article/view/11619},
       doi = {10.46586/tosc.v2024.i2.35-67},
       number = {2},
       journal = {IACR Transactions on Symmetric Cryptology},
       year = {2024},
       month = jun,
       pages = {35–67},
       git = {https://github.com/AugustinBariant/Implementations_LeMac_PetitMac},
       hal = {hal-04710478}
     }
     

3. Commutative Cryptanalysis Made Practical. Jules Baudrin, Patrick Felke, Gregor Leander, Patrick Neumann, Léo Perrin, and Lukas Stennes. IACR Transactions on Symmetric Cryptology. (2023). 10.46586/tosc.v2023.i4.299-329
   hal
   git

   • @article{SELF:ToSC:BFLNPS23,
       keywords = {incryptobib,journal},
       author = {Baudrin, Jules and Felke, Patrick and Leander, Gregor and Neumann, Patrick and Perrin, L{\'e}o and Stennes, Lukas},
       title = {Commutative Cryptanalysis Made Practical},
       pages = {299--329},
       volume = {2023},
       publisher = {Ruhr-Universit{\"a}t Bochum},
       year = {2023},
       journal = {IACR Transactions on Symmetric Cryptology},
       number = {4},
       doi = {10.46586/tosc.v2023.i4.299-329},
       git = {https://github.com/baudrin-j/commutative_cryptanalysis_made_practical},
       hal = {hal-04277884}
     }
     

4. Practical Cube Attack against Nonce-Misused Ascon. Jules Baudrin, Anne Canteaut, and Léo Perrin. IACR Transactions on Symmetric Cryptology. (2022). 10.46586/tosc.v2022.i4.120-144
   hal
   git

   • @article{SELF:ToSC:BauCanPer22,
       keywords = {incryptobib,journal},
       author = {Baudrin, Jules and Canteaut, Anne and Perrin, L{\'e}o},
       title = {Practical Cube Attack against Nonce-Misused {Ascon}},
       pages = {120--144},
       volume = {2022},
       publisher = {Ruhr-Universit{\"a}t Bochum},
       year = {2022},
       journal = {IACR Transactions on Symmetric Cryptology},
       number = {4},
       doi = {10.46586/tosc.v2022.i4.120-144},
       git = {https://github.com/baudrin-j/practical_cube_attack_against_nonce_misused_ascon},
       hal = {hal-03901680}
     }
     

Proceedings of peer-reviewed conferences

1. On functions of \(\mathbb{F}_{2^{2t}}\) mapping cosets of \(\mathbb{F}_{2^{t}}^*\) to cosets of \(\mathbb{F}_{2^{t}}^*\). Jules Baudrin, Anne Canteaut, and Léo Perrin. Thirteenth International Workshop on Coding and Cryptography - WCC 2024. (2024).
   proceedings

   • @article{SELF:WCC:BauCanPer24,
       keywords = {proceedings,conference},
       title = {On functions of $\mathbb{F}_{2^{2t}}$ mapping cosets of $\mathbb{F}_{2^{t}}^*$ to cosets of $\mathbb{F}_{2^{t}}^*$},
       author = {Baudrin, Jules and Canteaut, Anne and Perrin, Léo},
       year = {2024},
       month = jun,
       booktitle = {Thirteenth International Workshop on Coding and Cryptography - WCC 2024},
       pages = {45-57},
       address = {Perugia, Italy},
       url = {https://wcc2024.sites.dmi.unipg.it/WCC_proceedings.pdf}
     }
     

Preprints

1. Transistor: a TFHE-friendly Stream Cipher. Jules Baudrin, Sonia Belaïd, Nicolas Bon, Christina Boura, Anne Canteaut, Gaëtan Leurent, Pascal Paillier, Léo Perrin, Matthieu Rivain, Yann Rotella, and Samuel Tap. (2025).
   eprint

   • @article{SELF:EPRINT:BBBBCLPPRRT24,
       keywords = {unpublished,eprint},
       title = {Transistor: a {TFHE}-friendly Stream Cipher},
       author = {Baudrin, Jules and Belaïd, Sonia and Bon, Nicolas and Boura, Christina and Canteaut, Anne and Leurent, Gaëtan and Paillier, Pascal and Perrin, Léo and Rivain, Matthieu and Rotella, Yann and Tap, Samuel},
       year = {2025},
       month = feb,
       note = {Submitted},
       url = {https://eprint.iacr.org/2025/282}
     }
     

2. Linear self-equivalence of the known families of APN functions: a unified point of view. Jules Baudrin, Anne Canteaut, and Léo Perrin. (2024).
   preprint

   • @article{SELF:BauCanPer24,
       keywords = {unpublished,preprint},
       title = {Linear self-equivalence of the known families of APN functions: a unified point of view},
       author = {Baudrin, Jules and Canteaut, Anne and Perrin, Léo},
       year = {2024},
       month = oct,
       note = {Submitted},
       url = {../assets/pdf/papers/linear_self_equivalence_apn_functions.pdf}
     }
     

Talks

International conferences and workshops

1. On functions \(F : \mathbb{F}_{2^{2t}} \to \mathbb{F}_{2^{2t}}\) mapping cosets of \(\mathbb{F}_{2^{t}}^{*}\) to cosets of \(\mathbb{F}_{2^{t}}^{*}\). Thirteenth International Workshop on Coding and Cryptography - WCC 2024 . In Perugia, Italy , on June 18, 2024.
   slides
2. Commutative Cryptanalysis Made Practical. Fast Software Encryption - FSE 2024 . In Leuven, Belgium , on March 25, 2024.
   slides
   recording
3. Practical Cube Attack against Nonce-Misused Ascon. Fast Software Encryption - FSE 2023 . In Kobe, Japan , on March 23, 2023.
   slides
   recording
4. Practical cube-attack against nonce-misused Ascon. NIST Fifth Lightweight Cryptography Workshop (online) , on May 10, 2022.
   slides
   recording

National conferences and workshops

1. L'auto-équivalence linéaire, un point de vue unifié sur les familles connues de fonctions APN. Journées Codage et Cryptographie - JC2 2025 . In Pornichet, France , on March 2025.
   slides
2. Geometrical structures among known APN functions. Séminaire Codage et Cryptographie . In Paris, France , on July 5, 2024.
   slides
3. Commutative Cryptanalysis Made Practical. Journées Codage et Cryptographie - JC2 2023 . In Najac, France , on October 19, 2023.
   slides
4. Cube-like attack against nonce-misused Ascon. Journées Codage et Cryptographie - JC2 2022 . In Hendaye, France , on April 14, 2022.
   slides

Local seminars

1. Differential cryptanalysis of conjugate ciphers. Séminaire de cryptographie de Rennes . In Rennes, France , on February 7, 2025.
   slides
2. L'auto-équivalence linéaire, un point de vue unifié sur les familles connues de fonctions APN. Séminaire CRYPTO (UVSQ) . In Versailles, France , on February 21, 2025.
   slides
3. Cryptanalyse différentielle de chiffrements conjugués. Almasty seminar . In Paris, France , on January 17, 2025.
   slides
4. Practical cube-attack against nonce-misused Ascon. Seminar at UCL Crypto Group . In Louvain-la-Neuve, Belgium , on May 22, 2024.
   slides
5. La cryptanalyse commutative, une classe (pas trop) générale d’attaques. Séminaire CRYPTO (UVSQ) . In Versailles, France , on November 23, 2023.
   slides

PhD thesis and defense

I was a PhD student at Inria Paris (COSMIQ team) from September 2021 to December 2024 under the supervision of Anne Canteaut and Léo Perrin. I defended my PhD on December 6th, 2024.

1. Algebraic properties of symmetric ciphers and of their non-linear components, (2024).
   hal
   slides

   • @phdthesis{SELF:thesis,
       keywords = {thesis},
       title = {Algebraic properties of symmetric ciphers and of their non-linear components},
       author = {Baudrin, Jules},
       school = {{Sorbonne Universit{\'e}}},
       year = {2024},
       month = dec,
       hal = {tel-05020635},
       slides = {2024_12_06_phd_defense.pdf}
     }
     

Editorial Activities

External Reviews for:

• DCC 2025
• ISC 2024
• CRYPTO 2023
• Finite Fields and Their Applications: 2022, 2023.

²

1. This bibliography is generated from a .bibtex file using jekyll-scholar. This blog post is a good introduction to it. ↩︎

2. Extracted from xkcd.com ↩︎