Tancrède Lepoint is a Principal Applied Scientist in AWS Security. He is a cryptographer, specialized in privacy-enhancing technologies, lattice-based cryptography,
post-quantum cryptography, homomorphic encryption, and differential privacy.
He was a director of the International Association for Cryptologic Research
(2018-2024) and co-editor of the Cryptology ePrint Archive (2016-2023).
He worked at Apple (2021-2022), Google (2018-2021), SRI International (2016-2018), and CryptoExperts (2011-2016). He holds a Ph.D. in Computer Science from École Normale Supérieure and University of Luxembourg.
Tancrède co-authored the two post-quantum cryptographic primitives (CRYSTALS-Kyber and
CRYSTALS-Dilithium) selected for standardization by NIST. He drove the cryptographic deployment
of the Exposure Notifications Privacy-preserving Analytics within Google,
a differentially-private multiparty computation system based on the private measurement system Prio. He also designed the multi-server verification flow for Exposure Notifications in the US.
He worked on lightweight anonymous credentials (Privacy-Pass, trust tokens) and specializes in homomorphic encryption.
