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Erschienen in: Designs, Codes and Cryptography 2/2014

01.11.2014

A matrix approach for constructing quadratic APN functions

verfasst von: Yuyin Yu, Mingsheng Wang, Yongqiang Li

Erschienen in: Designs, Codes and Cryptography | Ausgabe 2/2014

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Abstract

A one to one correspondence is given between quadratic homogeneous APN functions and a special kind of matrices which we call as QAM’s. By modifying the elements of a known QAM, new quadratic APN functions can be constructed. Based on the nice mathematical structures of the QAM’s, an efficient algorithm for constructing quadratic APN functions is proposed. On \(\mathbb {F}_{2^7}\), we have found 471 new CCZ-inequivalent quadratic APN functions, which is 20 times more than the number of the previously known ones. Before this paper, It is only found 23 classes of CCZ-inequivalent APN functions on \(\mathbb {F}_{2^8}\). With the method of this paper, we have found 2,252 new CCZ-inequivalent quadratic APN functions, and this number is still increasing.
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Metadaten
Titel
A matrix approach for constructing quadratic APN functions
verfasst von
Yuyin Yu
Mingsheng Wang
Yongqiang Li
Publikationsdatum
01.11.2014
Verlag
Springer US
Erschienen in
Designs, Codes and Cryptography / Ausgabe 2/2014
Print ISSN: 0925-1022
Elektronische ISSN: 1573-7586
DOI
https://doi.org/10.1007/s10623-014-9955-3

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