About

I'm a researcher and entrepreneur in cryptography, currently CEO at CryptoExperts, a service and technology company in cryptography. Previously, I've been cryptography engineer at Oberthur Technologies (smart card manufacturer, now Idemia) and PhD student at University of Luxembourg (2006-2009).

My current work involves many aspects of practical cryptography and its applications. I have a particular research interest for provable security againts side-channel attacks, white-box cryptography, zero-knowledge proofs and post-quantum signatures.

This webpage contains information about my scientific activities, publications, thesis, and talks.



Scientific Activities

On-going collaborative projects:
  – RESQUE: BPI funded project on post-quantum cryptography
  – SWITECH: ANR funded project on white-box cryptography
  – SWAP: ANR funded project on symmetric cryptography primitives

Standardization submissions:
  – SDitH | RYDE | MIRA | MQOM: Post-quantum signature schemes submitted to NIST
  – Pyjamask: A masking-friendly cipher submitted to NIST call for lightweight cryptography

Open-source tools:
  – OBSCURE: A framework for strong software obfuscation relying on a simple stateless secure element
  – CRY.ME: A flawed messaging application for educational purposes (cryptographic challenge)
  – circkit: A small framework for defining, constructing and manipulating computational circuits
  – IronMask | VRAPS | tightPROVE: Formal verification tools for the security of masked implementations
  – Tornado: A compiler of masked bitsliced implementations

PhD advisor of
  – Nicolas Bon (2022-present) Development of Optimized Operations for Homomorphic Cryptography
     co-supervised with Sonia Belaïd and David Pointcheval
  – Abdul Rahman Taleb (2020-2023) Secure and Verified Cryptographic Implementations in the Random Probing Model
     co-supervised with Sonia Belaïd and Damien Vergnaud
  – Thibauld Feneuil (2020-2023) Post-Quantum Signatures from Secure Multiparty Computation
     co-supervised with Jean-Claude Bajard and Antoine Joux
  – Junwei Wang (2017-2020) On the Practical Security of White-Box Cryptography
     co-supervised with Jean-Sébastien Coron, Sihem Mesnager and Pascal Paillier
  – Dahmun Goudarzi (2015-2018) Secure Implementation of Block Ciphers against Physical Attacks
     co-supervised with Damien Vergnaud

PhD jury member of   Pierre Galissant (Dec. 2023)   Samuel Tap (Dec. 2023)   Léonard Assouline (Dec. 2023)   Chloé Gravouil (Jun. 2023)   Valence Cristiani (Dec. 2022)   Melissa Azouaoui (Oct. 2021)   Aleksei Udovenko (Apr. 2019)   Romain Poussier (Jan. 2018)

Program co-chair of CHES 2018 with Dan Page (co-editors-in-chief of IACR TCHES Vol. 2018)  

Program committee member of   CRYPTO 2024   EUROCRYPT 2024   SAC 2023   CRYPTO 2023   CHES 2022   Latin Crypt 2021   EUROCRYPT 2021   JC2 2020   CHES 2019   ASIACRYPT 2017   CHES 2017   COSADE 2017   TIs 2016   SPACE 2016   CHES 2016   EUROCRYPT 2016   COSADE 2016   GREHACK 2015   CHES 2015   COSADE 2015   CHES 2014   FDTC 2014   COSADE 2014   CARDIS 2013   CHES 2013   FDTC 2013   COSADE 2013   CARDIS 2012   CHES 2012   FDTC 2012   HOST 2012   CARDIS 2011   HOST 2011   HOST 2010  

General co-chair of CHES 2015 with Emmanuel Prouff and Guénaël Renault – French press on the event: Les rois du cryptage à Saint-Malo

Co-organiser of ECRYPT-CSA workshops WISE 2015, AWACS 2016, WhibOx 2016, wr0ng 2017

Co-organiser of the WhibOx contest edition 1 (2017), edition 2 (2019) and edition 3 (2021)

Member of CHES Steering Committee since 2018

Member of IACR since 2007

Publications

Preprints

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

Unpublished manuscripts

Habilitation Thesis


On the Provable Security of Cryptographic Implementations


Defended on June 21, 2022 at École Normale Supérieure (Paris).

Habilitation jury: Anne Canteaut, Jean-Sebastien Coron, Pierre-Alain Fouque, Yuval Ishai, Elisabeth Oswald, David Pointcheval, Bart Preneel, Emmanuel Prouff, Francois-Xavier Standaert

  manuscript


PhD Thesis


On the Physical Security of Cryptographic Implementations


Defended on September 22, 2009 at University of Luxembourg.

PhD advisor: Jean-Sébastien Coron

PhD committee: Alex Biryukov, Jean-Sébastien Coron, Louis Goubin, Marc Joye, Franck Leprévost, François-Xavier Standaert

  manuscript

Talks

Contact information

If you wish to contact me, send me an email: