Jacques Stern is a cryptographer, currently a professor at the École Normale Supérieure

École Normale Supérieure

The École normale supérieure is one of the most prestigious French grandes écoles...

, where he is Director of the Computer Science Laboratory. He received the 2006 CNRS Gold Medal. His notable work includes the cryptanalysis of numerous encryption and signature schemes, the design of the Pointcheval–Stern signature algorithm, the Naccache–Stern cryptosystem and Naccache–Stern knapsack cryptosystem, and the block cipher

Block cipher

In cryptography, a block cipher is a symmetric key cipher operating on fixed-length groups of bits, called blocks, with an unvarying transformation. A block cipher encryption algorithm might take a 128-bit block of plaintext as input, and output a corresponding 128-bit block of ciphertext...

s CS-Cipher

CS-Cipher

In cryptography, CS-Cipher is a block cipher invented by Jacques Stern and Serge Vaudenay in 1998. It was submitted to the NESSIE project, but was not selected....

, DFC

DFC (cipher)

In cryptography, DFC is a block cipher which wascreated in 1998 by a group of researchers from École Normale Supérieure, CNRS, and France Télécom and submitted to the AES competition.Like other AES candidates, DFC operates on blocks of 128 bits, using a key of 128, 192, or 256 bits...

, and xmx. Recently a spectacular total break of the SFLASH cryptosystem was discovered by Jacques Stern.

Awards

• Knight of the Légion d'honneur
  Légion d'honneur
  The Legion of Honour, or in full the National Order of the Legion of Honour is a French order established by Napoleon Bonaparte, First Consul of the Consulat which succeeded to the First Republic, on 19 May 1802...
  
   recipient
• 2005 CNRS silver medal
• IACR
  International Association for Cryptologic Research
  The International Association for Cryptologic Research is a non-profit scientific organization whose purpose is to further research in cryptology and related fields...
  
  Fellow, 2005
• 2006 CNRS gold medal