Fourier Spectra of Binomial APN Functions

Details Fourier Spectra of Binomial APN Functions Fourier Spectra of Binomial APN Functions

2008-03-26

arxiv.org/abs/0803.3781v1

Computer Science

Discrete Mathematics

20 pages. Submitted to the SIAM Journal on Discrete Mathematics

Scientific paper

In this paper we compute the Fourier spectra of some recently discovered binomial APN functions. One consequence of this is the determination of the nonlinearity of the functions, which measures their resistance to linear cryptanalysis. Another consequence is that certain error-correcting codes related to these functions have the same weight distribution as the 2-error-correcting BCH code. Furthermore, for fields of odd degree, our results provide an alternative proof of the APN property of the functions.

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