Paper 2020/1166
A Differential and Linear Analysis of the Inversion Mapping in Odd-Characteristic Finite Fields
Jorge Nakahara Jr
Abstract
Substitution boxes (S-boxes) based on the inversion mapping in even-characteristic finite fields are widely used components in the design of cryptographic primitives such as block ciphers (notably the AES cipher). This report focuses on the inversion mapping in finite fields GF(p^n) where p is a (small) odd prime and n is a (small) integer. We compare the differential and linear profiles of S-boxes over odd- and even-characteristic fields, which also motivates the design and analysis of AES variants operating in fields of odd-characteristic. Even for GF(2^n), the study of S-boxes which are APN permutations (odd-valued n)already shows resistance to differential and linear cryptanalysis after three rounds.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Preprint. MINOR revision.
- Keywords
- odd-characteristic finite fieldsinversion mappingS-boxAPN permutations
- Contact author(s)
- jorge_nakahara @ yahoo com br
- History
- 2020-09-25: received
- Short URL
- https://ia.cr/2020/1166
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2020/1166,
author = {Jorge Nakahara Jr},
title = {A Differential and Linear Analysis of the Inversion Mapping in Odd-Characteristic Finite Fields},
howpublished = {Cryptology {ePrint} Archive, Paper 2020/1166},
year = {2020},
url = {https://eprint.iacr.org/2020/1166}
}
