International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 31 December 2015

George Shushuev
ePrint Report ePrint Report
In this paper we prove that there are only differential 4-uniform functions which are on distance 1 from an APN function. Also we prove that there are no APN functions of distance 1 from another APN functions up to dimension 5. We determine some properties of the set of values of an arbitrary vectorial Boolean function from F_n^2 to F_n^2 in connection to the set of values of its derivatives. These results are connected to several open question concerning metric properties of APN functions.
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