Jacques Stern (born 21 August 1949) is a cryptographer, currently a professor at the École Normale Supérieure. He received the 2006 CNRS Gold medal. His notable work includes the

cryptanalysis Cryptanalysis (from the Greek ''kryptós'', "hidden", and ''analýein'', "to analyze") refers to the process of analyzing information systems in order to understand hidden aspects of the systems. Cryptanalysis is used to breach cryptographic sec ...

of numerous encryption and signature schemes, the design of the Pointcheval–Stern signature algorithm, the

Naccache–Stern cryptosystem The Naccache–Stern cryptosystem is a homomorphic public-key cryptosystem whose security rests on the higher residuosity problem. The Naccache–Stern cryptosystem was discovered by David Naccache and Jacques Stern in 1998. Scheme Definition L ...

and

Naccache–Stern knapsack cryptosystem The Naccache–Stern Knapsack cryptosystem is an atypical public-key cryptosystem developed by David Naccache and Jacques Stern in 1997. This cryptosystem is deterministic, and hence is not semantically secure. While unbroken to date, this system ...

, and the

block cipher In cryptography, a block cipher is a deterministic algorithm operating on fixed-length groups of bits, called ''blocks''. Block ciphers are specified cryptographic primitive, elementary components in the design of many cryptographic protocols and ...

CS-Cipher In cryptography, CS-Cipher (for ''Chiffrement Symétrique'') is a block cipher invented by Jacques Stern and Serge Vaudenay in 1998. It was submitted to the NESSIE project, but was not selected. The algorithm uses a key length between 0 and 128 ...

, DFC, and

xmx In cryptography, xmx is a block cipher designed in 1997 by David M'Raïhi, David Naccache, Jacques Stern, and Serge Vaudenay. According to the designers it "uses public-key-like operations as confusion and diffusion means." The cipher was desig ...

. He also contributed to the cryptanalysis of the ''SFLASH''

signature scheme A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A valid digital signature, where the prerequisites are satisfied, gives a recipient very high confidence that the message was created b ...

Awards

* Knight of the Légion d'honneur recipient * 2005 CNRS Silver Medal * IACR Fellow, 2005 * 2006 CNRS Gold medal * 2007

RSA Award for Excellence in Mathematics RSA may refer to: Organizations Academia and education *Rabbinical Seminary of America, a yeshiva in New York City * Regional Science Association International (formerly the Regional Science Association), a US-based learned society * Renaissance ...

References

External links

* Modern cryptographers Public-key cryptographers Living people 1949 births French cryptographers International Association for Cryptologic Research fellows {{France-scientist-stub