A few words

In September 2021, I started doctoral studies under the supervision of Anne Canteaut & Léo Perrin, whithin Inria COSMIQ team.

I am currently focusing on cryptanalysis of symmetric primitives, especially lightweight ones. As an example, I analyzed the security of Ascon, which was announced in early 2023 as the winner of the NIST standardization process for lightweight cryptography.

I am also part of some workgroups whose purposes are to design new primitives either for new use cases or focused on extreme performances.

Teaching

Besides, I am in charge of weekly tutorials at UVSQ (Université Versailles Saint-Quentin-en-Yvelines, Versailles, France).

2023-2024

• Cryptography (MIN15122) for master students,
  • TD2 exercice 4 correction
  • TD4 exercice 2 (AES) correction
• Complementary course in discrete mathematics for master students (MIN17101, sept 2023, Group 3),
  • Course webpage webpage.
  • CC1 (21/09) correction.
  • CC2 (25/09) correction.
  • CC3 (27/09) correction.
  • CC4 (29/09) correction.
  • CC5 (03/10) correction.
  • Complementary notes on the Chinese Remainder Theorem notes.

Previous years

• Introduction to (Python) programming (IN100) for first-year students (sept 2021 – jan 2022)
• Cryptography for third-year students (feb 2022 – may 2022)
• Complementary course in discrete mathematics for master students (MIN17101, sept 2022)
• Complementary course in algorithmic for master students (MIN17102, sept 2022)
• Mathematics for computer science (IN310) for second-year students (sept 2022 – dec 2022) - CC1 (oct 2022) sujet correction
  • CC2 (dec 2022) sujet correction

Talks

• La cryptanalyse commutative, une classe (pas trop) générale d’attaques,

  Séminaire CRYPTO (UVSQ), 23 novembre 2023, Versailles, France.

• Commutative cryptanalysis made practical,

  Journées C2 2023 (a French Coding theory and Cryptography workshop), October 15-20 2022, Najac, France. slides

• Practical Cube Attack against Nonce-Misused Ascon

  FSE 2023, March 20-24 2023, Mirror Event in Kobe, Japan, slides.

• Practical cube-attack against nonce-misused Ascon

  NIST fifth Lightweight Cryptography Workshop, May 9-11 2022, online, recording, slides.

• Cube-like attack against Ascon,

  Journées C2 2022 (a French Coding theory and Cryptography workshop), April 10-15 2022, Hendaye, France.

Publications

Jules Baudrin, Patrick Felke, Gregor Leander, Patrick Neumann, Léo Perrin & Lukas Stennes. Commutative Cryptanalysis Made Practical. IACR Transactions on Symmetric Cryptology, 2023(4), 299–329. available on tosc.iacr.org.

Jules Baudrin, Anne Canteaut & Léo Perrin. Practical Cube Attack against Nonce-Misused Ascon. IACR Transactions on Symmetric Cryptology, 2022(4), 120–144. available on tosc.iacr.org

Contact

Email address: first [dot] last [at] inria [dot] fr
Postal address: Inria de Paris
2, rue Simone IFF
75012 Paris CEDEX
FRANCE