Titlebook: Codes, Cryptology and Information Security; Second International Said El Hajji,Abderrahmane Nitaj,El Mamoun Souidi Conference proceedings 2

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Some Results on the Known Classes of Quadratic APN FunctionsIn this paper, we determine the Walsh spectra of three classes of quadratic APN functions and we prove that the class of quadratic trinomial APN functions constructed by G?lo?lu is affine equivalent to Gold functions.

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Pejman Najafi,Feng Cheng,Christoph Meinelfield. In fact, we introduce new constructions of functions over elliptic curves which take in input two random points from two different subgroups. In other words, for a given elliptic curve . defined over a finite field . and two random points . and ., where . and . are two subgroups of ., our fun