Here are videos of recent talks:

• Short talk on Random Sampling Revisited: Lattice Enumeration with Discrete Pruning at EUROCRYPT 2017.
• Long talk on Lattice-based Cryptography at PQ CRYPTO Winter School 2016.

Here are a few slides from recent talks:

• 2016:
  • NTU/NUS Summer School (this supersedes CIMPA-ICTP):
    • Introduction to Lattices and their Algorithms
    • Hermite's inequality and the LLL Algorithm
    • Minkowski's inequality and worst-case to average-case reductions
    • Lattice-based cryptography
• 2012:
  • ECRYPT II Summer School on Lattices: Introduction and Security Estimates.
• 2011:
  • Lattice reduction algorithms: Theory and Practice (Invited talk at EUROCRYPT '11 and CHINACRYPT '11)
  • Mathematics and Information Security (Popularization for undergrad students, Mathematics Day of the Fondation Sciences Mathématiques de Paris)
• 2010:
  • Playing with Secrets: Cryptography in Video Games (Seminar in Japan)
  • Lattice-based Cryptography (Basque Colloquium in Mathematics and its Applications, Spain)
  • Short Introduction to Crypto (Presentation for new ENS science students)
  • The LLL Algorithm (Seminar in France).
• 2009:
  • ASIACRYPT '09 (Japan) on factoring pq^2.
  • CRYPTO '09 (USA) on the random-oracle model in practice.
• 2007: My Habilitation defense (slides in English).
• 2006:
  • May: EUROCRYPT '06 (Russia) on how to learn a parallelepiped, and applications to the cryptanalysis of GGH and NTRU signatures.