Serge Vaudenay

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Serge Vaudenay (5 April 1968-) is a well-known French cryptographer.

Serge Vaudenay entered the École Normale Supérieure in Paris as a normalien student in 1989. In 1992, he passed the agrégation in mathematics. He did his PhD at the computer science laboratory of École Normale Supérieure, and defended it in 1995 at University Paris 7; his advisor was Jacques Stern. From 1995 to 1999, he was researcher at CNRS. In 1999, he moved to a professorship at the École Polytechnique Fédérale de Lausanne where he is at the lead of the Laboratory of Security and Cryptography (LASEC).

He has published several papers related to cryptanalysis and design of block ciphers. He is one of the authors of the IDEA NXT (FOX) algorithm (together with P. Junod). Vaudenay also discovered a severe vulnerability in the SSL/TLS protocol. The attack he forged could lead to the interception of the password. He also published a paper about biased statistical properties in the Blowfish cipher and is the author of the best attack on the Bluetooth cipher : E0.