"Jacques Stern (born 1949) is a cryptographer, currently a professor at the \u00C9cole Normale Sup\u00E9rieure, 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\u2013Stern signature algorithm, the Naccache\u2013Stern cryptosystem and Naccache\u2013Stern knapsack cryptosystem, and the block ciphers CS-Cipher, DFC, and xmx."@en . . . "Jacques Stern"@en . . . . . "French cryptographer" . . . . "Stern, Jacques"@en . "1949Z"^^ . .