Arithmetic, geometry, cryptography and coding theory : 13th Conference on Arithmetic, Geometry, Cryptography and Coding Theory, March 14-18, 2011, CIRM, Marseille, France : Geocrypt 2011, June 19-24, 2011, Bastia, France - Aubry, Yves, 1965-; Ritzenthaler, Christophe, 1976-; Zykin, Alexey, 1984- (Contemporary mathematics (American Mathematical Society) ;, 2012)