Thomas Baignères

Now

Since 2010, I am a Cryptography & Security Expert for CryptoExperts in Paris !

Before

I received a Ph.D. in 2008 under the direction of Prof. Serge Vaudenay, head of the Cryptography and Security Laboratory (LASEC) at EPFL, Switzerland. My main research areas cover block ciphers and their cryptanalysis. I then spent some time in Belgium where I worked as a consultant and researcher for Smals.

Contact

Thomas Baignères - CryptoExperts
41 boulevard des Capucines
75002, Paris, France
+33 6 48 44 74 92
first.last @ cryptoexperts.com

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ECRYPT Workshop on Lightweight Cryptography

Posted in November 2011

I am part of the program committee of the 2011 edition of the ECRYPT Workshop on Lightweight Cryptography.

LC 2011 is organized by the UCL Crypto Group and sponsored by the SymLab and VAMPIRE virtual labs of the Network of Excellence in Cryptology - ECRYPT II. It will be held on November 28-29, 2011, in Louvain-la-Neuve in Belgium.

The Complexity of Distinguishing Distributions

Joint work with Serge Vaudenay
Published in the Proceedings of ICITS 2008

Cryptography often meets the problem of distinguishing distributions. In this paper we review techniques from hypothesis testing to express the advantage of the best distinguisher limited to a given number of samples. We link it with the Chernoff information and provide a useful approximation based on the squared Euclidean distance. We use it to extend linear cryptanalysis to groups with order larger than 2.

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