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École Polytechnique · LIX · GRACE Team
Olivier Blazy — Professor in Cybersecurity
Scientific Director of CIEDS · Post-quantum cryptography · Digital identity · Privacy
Olivier Blazy
Professor · Scientific Director of CIEDS
École Polytechnique — LIX — GRACE Team — Palaiseau, France
I work on provable security with a focus on smooth projective hash functions, post-quantum cryptography (NIST standard proposals including HQC), anonymous credentials, digital identity and privacy-preserving protocols. My research bridges theoretical foundations and practical constructions — from secure messaging systems to online age verification.
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2026 →
Scientific Director, CIEDS
Interdisciplinary Centre for Defence and Security · École Polytechnique · Institut Polytechnique de Paris
2021 →
Professor, École Polytechnique
LIX · GRACE Team · Palaiseau, France
2014–2021
Université de Limoges (HDR 2019)
Associate Professor (MCF) · XLIM · Cryptis Team
2012–2014
Ruhr-Universität Bochum
Postdoc · Foundation of Cryptography
2008–2012
ENS Paris · PhD
Supervised by D. Pointcheval · Zero-knowledge & implicit proofs
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Current course at École Polytechnique · former lectures & material
Current École Polytechnique · since 2021
Since 2021 · Bachelor of Science
Fundamentals of computer programming in Python, with applications across the sciences. Students explore core algorithms and data structures up to binary trees using procedural, recursive and object-oriented techniques — building the foundations extended in CSE 102 and CSE 103.
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Former lectures Université de Limoges · Paris
Courses previously taught, mostly in French. Master-level material was distributed through Moodle, so not everything is linked here.
Université de Limoges — XLIM · Cryptis (2014–2021)
2020–2021 · Limoges–Poitiers
Security of databases: encryption, differential privacy and SQL-injection attacks and defences.
2015–2021 · Limoges
Introduction to cryptography from Caesar to RSA, with historical attack techniques such as statistical frequency analysis.
2015–2021 · Limoges
Lectures on elliptic curves, with practical labs on Sage.
2015–2021 · Limoges
Secret-key tutorials: differential cryptanalysis and linear approximation.
2014–2016 · Limoges
Public-key tutorials: CCA encryption, security reductions and Hash Proof Systems.
2016–2021 · Limoges
Coordination of guest speakers on information-security ISO standards.
2014–2021 · Limoges
Network security: IDS, VLANs, IPSec, Wi-Fi and certificates.
2014–2021 · Limoges
DRM, French data-protection law (Informatique et Libertés) and social engineering.
Paris — ENS · Université Paris Diderot / Paris 7 (2009–2012)