Jacques Stern (born 21 August 1949) is a cryptographer, currently a professor at the École Normale Supérieure. He received the 2006 CNRS Gold medal.[1][2] 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 ciphers CS-Cipher, DFC, and xmx. He also contributed to the cryptanalysis of the SFLASH signature scheme.[3]

Jacques Stern
Jacques Stern making a speech before receiving the CNRS gold medal
Born (1949-08-21) 21 August 1949 (age 74)
Alma materParis Diderot University
Known forPointcheval–Stern signature algorithm
Scientific career
InstitutionsÉcole Normale Supérieure
Doctoral advisorJean-Louis Krivine [fr]
Doctoral studentsAntoine Joux
Brigitte Vallée
Serge Vaudenay
David Pointcheval




  1. ^ "CNRS Gold Medal for 2006: Jacques Stern". CNRS. 2006-10-06. Archived from the original on 2018-12-01. Retrieved 2019-08-18.
  2. ^ "Press Conference: CNRS Gold Medal for 2006" (PDF). CNRS. 2006-10-06. Retrieved 2019-08-18.
  3. ^ Dubois, Vivien; Fouque, Pierre-Alain; Shamir, Adi; Stern, Jacques (2007-04-20). "Practical Cryptanalysis of SFLASH". Retrieved 2019-08-18.