Paper 2021/1134
Some observations on ZUC-256
Alexander Maximov
Abstract
In this report we study efficient binary approximations of the FSM of ZUC-256 with high correlation around $2^{-21.1}$ between the keystream words and the LFSR. We then map these approximations into a binary distinguisher with complexity around $2^{234}$. Thereafter, we convert to an approximation in the LFSR's field $\mathbb{Z}_p$ with correlation around $2^{-33.6}$. We share a number of observations and state open problems for further research and considerations.
Note: The report is updated with more results and observations.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Preprint. MINOR revision.
- Keywords
- 5GZUC-256
- Contact author(s)
- alexander maximov @ ericsson com
- History
- 2021-09-17: last of 2 revisions
- 2021-09-07: received
- See all versions
- Short URL
- https://ia.cr/2021/1134
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2021/1134,
author = {Alexander Maximov},
title = {Some observations on {ZUC}-256},
howpublished = {Cryptology {ePrint} Archive, Paper 2021/1134},
year = {2021},
url = {https://eprint.iacr.org/2021/1134}
}
