Various material:

• ECHO hash function: a SHA-3 proposal
  by Benadjila, Billet, Gilbert, Macario-Rat, Peyrin, Robshaw, and Seurin.
• Overview of Cryptanalysis Techniques in Multivariate Public Key Cryptography
  by Billet and Ding, in Gröbner Bases, Coding, and Cryptography, Springer©2009.
• SOSEMANUK, a Fast Software-Oriented Stream Cipher
  by Berbain, Billet, Canteaut, Courtois, Gilbert, Goubin, Gouget, Granboulan, Lauradoux, Minier, Pornin, and Sibert.
  In New Stream Cipher Designs, Springer ©2008.
• Decim v2
  by Berbain, Billet, Canteaut, Courtois, Debraize, Gilbert, Goubin, Gouget, Granboulan, Lauradoux, Minier, Pornin, and Sibert.
  In New Stream Cipher Designs, Springer ©2008.

These are some invited talks:

• White-Box Cryptography: Beyond the Black Box
  ECRYPT PhD Summer School:
  Advanced Topics in Cryptography
  12–16 May 2008, Crete, Greece
• Multivariate Cryptography: Design of Selected Schemes
  ECRYPT PhD Summer School:
  Emerging Topics in Cryptographic Design and Cryptanalysis
  30 April — 4 May 2007, Samos, Greece
• Multivariate Cryptography: An Overview
  Special Semester on Gröbner Bases and Related Methods 2006:
  Gröbner Bases in Cryptography, Coding Theory, and Algebraic Combinatorics
  01 May — 06 May 2006, Linz, Austria

©2003–2010 Olivier BILLET