Geodesic
On some open questions about APN functions
Prikladnaya Diskretnaya Matematika. Supplement, no. 7 (2014), pp. 11-13 Cet article a éte moissonné depuis la source Math-Net.Ru

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Some open questions in the theory of APN functions are stated. Few results obtained in this direction are listed. For the sum of two APN functions of dimension 2, a necessary and sufficient condition to be an APN function is proved.
Keywords: vectorial Boolean function, APN function. 
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V. A. Vitkup. On some open questions about APN functions. Prikladnaya Diskretnaya Matematika. Supplement, no. 7 (2014), pp. 11-13. http://geodesic.mathdoc.fr/item/PDMA_2014_7_a2/

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