Sylvain Chatel
Privacy and Applied Cryptography Researcher
CISPA Helmholtz Center for Information Security
About
I am a security and privacy researcher. I am currently a senior postdoctoral researcher at CISPA working with Dr. Wouter Lueks. Before that, I was member of the Security and Privacy Engineering Laboratory (SPRING) at the Ecole Polytechnique Fédérale de Lausanne (EPFL) in Switzerland.
I completed my PhD at EPFL where I work under the supervision of Prof. Carmela Troncoso and Prof. Jean-Pierre Hubaux.
My research interests revolve around the topic of applied cryptography for security and privacy. In particular, how to combine zero-knowledge proofs and homomorphic encryption to enable security without compromising privacy and utility.
Publications
(2026).
HE-based On-the-Fly MPC, Revisited: Universal Composability, Approximate and Imperfect Computation, Circuit Privacy.
In ASIACRYPT 2026,.
(2026).
Understanding the Privacy-Preserving Potential of HTTP/2 Against Webpage Fingerprinting.
In ACM CCS 2026,.
(2026).
xDup: Privacy-Preserving Deduplication for Humanitarian Organizations using Fuzzy PSI.
In the 2026 IEEE Symposium on Security and Privacy (SP),.
(2025).
A Low-Cost Privacy-Preserving Digital Wallet for Humanitarian Aid Distribution.
In the 46th IEEE Symposium on Security and Privacy, 2025.
(2024).
Helium: Scalable MPC among Lightweight Participants and under Churn.
CCS 2024.
Contact
- sylvain.chatel[@]cispa.de
- +49 681 87083 2425
- Stuhlsatzenhaus 5, Saarbrücken, SL 66123