### Classification of quadratic APN functions with coefficients in GF(2) for dimensions up to 9

Yuyin Yu, Nikolay Kaleyski, Lilya Budaghyan, and Yongqiang Li

##### Abstract

Almost perfect nonlinear (APN) and almost bent (AB) functions are integral components of modern block ciphers and play a fundamental role in symmetric cryptography. In this paper, we describe a procedure for searching for quadratic APN functions with coefficients in GF(2) over the finite fields GF(2^n) and apply this procedure to classify all such functions over GF(2^n) with n up to 9. We discover two new APN functions (which are also AB) over GF(2^9) that are CCZ-inequivalent to any known APN function over this field. We also verify that there are no quadratic APN functions with coefficients in GF(2) over GF(2^n) with n between 6 and 8 other than the currently known ones.

Available format(s)
Category
Foundations
Publication info
Preprint. MINOR revision.
Keywords
Boolean functionsAlmost Perfect NonlinearAlmost BentQuadratic functions
Contact author(s)
nikolay kaleyski @ uib no
History
Short URL
https://ia.cr/2019/1491

CC BY

BibTeX

@misc{cryptoeprint:2019/1491,
author = {Yuyin Yu and Nikolay Kaleyski and Lilya Budaghyan and Yongqiang Li},
title = {Classification of quadratic APN functions with coefficients in GF(2) for dimensions up to 9},
howpublished = {Cryptology ePrint Archive, Paper 2019/1491},
year = {2019},
note = {\url{https://eprint.iacr.org/2019/1491}},
url = {https://eprint.iacr.org/2019/1491}
}

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