home • publications & preprints • phd 

About me

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 lightweigth anonymous credentials (Privacy-Pass, trust tokens) and specializes in homomorphic encryption.

Program committees

• 2023: USENIX SECURITY, CRYPTO, PKC, CT-RSA.
• 2022: USENIX SECURITY.
• 2021: CHES, USENIX SECURITY, IEEE S&P, CT-RSA.
• 2020: WAHC (chair), CHES, USENIX SECURITY, EUROCRYPT, CT-RSA.
• 2019: SSR, WAHC (chair), USENIX SECURITY, PKC, CT-RSA.
• 2018: SSR, WAHC, SCN, CHES, CRYPTO, AFRICACRYPT, COSADE, PQCRYPTO, CT-RSA.
• 2017: INDOCRYPT, CANS, CHES, PQCRYPTO, EUROCRYPT, WAHC, CT-RSA.
• 2016: CHES, ICITS, WAHC.
• 2015: CANS, SECICT, ACNS, ACISP, WAHC.