Paper 2020/645
Correlation distribution analysis of a two-round key-alternating block cipher
Liliya Kraleva, Nikolai L. Manev, and Vincent Rijmen
Abstract
In this paper we study two-round key-alternating block ciphers with round function $f(x)=x^{(2^t+1)2^s},$ where $t,s$ are positive integers. An algorithm to compute the distribution weight with respect to input and output masks is described. In the case $t=1$ the correlation distributions in dependence on input and output masks are completely determined for arbitrary pairs of masks. We investigate with more details the case $f(x)=x^3$ and fully derive and classify the distributions, proving that there are only 5 possible values for the correlation for any pair of masks.
Metadata
- Available format(s)
-
PDF
- Category
- Foundations
- Publication info
- Published elsewhere. Tatra Mountains Mathematical Publications 73(1), 2019
- DOI
- 10.2478/tmmp-2019-0009
- Keywords
- correlation distributionlinear cryptanalysiskey-alternating cipherscube functions
- Contact author(s)
- liliya_kraleva @ abv bg
- History
- 2020-06-03: received
- Short URL
- https://ia.cr/2020/645
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2020/645,
author = {Liliya Kraleva and Nikolai L. Manev and Vincent Rijmen},
title = {Correlation distribution analysis of a two-round key-alternating block cipher},
howpublished = {Cryptology ePrint Archive, Paper 2020/645},
year = {2020},
doi = {10.2478/tmmp-2019-0009},
note = {\url{https://eprint.iacr.org/2020/645}},
url = {https://eprint.iacr.org/2020/645}
}
