I am a cryptography researcher at PQShield. Before that, I was an engineer at Thales. Still before it, I completed a PhD at the École Normale Supérieure. My main fields of interest are post-quantum cryptography and discrete algorithms, however I am open to most topics related to cryptography.

PQShield SAS is hiring!
  • We are looking for excellent permanent and/or post-doctoral researchers to work with our research team based in Paris.
    More information here.
  • Rafael del Pino and myself are also offering a M2 (graduation) internship for Summer 2022, see here.
    Update 26/01/2022: this internship offer is now closed.
  • More generally, I am always looking for talented interns, contact me directly if you are interested.


PhD Thesis

Talks (since 2017)


NIST is currently supervising a standardization process to replace the current public-key cryptographic algorithms with post-quantum solutions. Falcon is a lattice-based signature scheme proposed as a candidate. Out of the 82 initial submissions, it is one of the 26 still currently considered for standardization. Falcon is also the candidate signature scheme with the lowest communication cost (added sizes of a public key and a signature).

Falcon is a joint work with a team of talented cryptographers, cryptanalysts and implementers: Pierre-Alain Fouque, Jeffrey Hoffstein, Paul Kirchner, Vadim Lyubashevsky, Thomas Pornin, Thomas Ricosset, Gregor Seiler, William Whyte and Zhenfei Zhang.



  • Laurent Castelnovi - Université de Limoges
    Master Internship 2017 -  
  • Mélissa Rossi - Thales / École Normale Supérieure / ANSSI
    PhD 2017-2020
  • Marc Abboud - École Normale Supérieure
    Master Internship 2019
  • Maxime Plançon - École Normale Supérieure de Cachan
    Master Internship 2019 + ARPE 1-Year Internship 2019-2020