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Séminaire Lambda

Introduction to post quantum cryptography and hybridization

Léo Noël

( Institut de Mathématiques de Bordeaux )

Salle 1

14 janvier 2026 à 17:00

Quantum computers are great news for physicists and virologists but terrible news for cybersecurity. In this talk, we’ll demystify how modern cryptography works, why Shor’s algorithm changes the rules, and what "post‑quantum" actually means. We will meet the main protagonists: lattices, codes, multivariate systems, hash functions and isogenies, and explain what is hybridization. We will also see why we have to quickly switch to post-quantum cryptography because of the “harvest now, decrypt later”. It is a high-level presentation, so you don't need to be a professional cryptographer to attend ;).