Paper 2023/963
An invariant of the round function of QARMAv2-64
, KU LeuvenAbstract
This note shows that there exists a nontrivial invariant for the unkeyed round function of QARMAv2-64. It is invariant under translation by a set of $2^{32}$ constants. The invariant does not extend over all rounds of QARMAv2-64 and probably does not lead to full-round attacks. Nevertheless, it might be of interest as it can be expected to give meaningful weak-key attacks on round-reduced instances when combined with other techniques such as integral cryptanalysis.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Preprint.
- Keywords
- CryptanalysisNonlinear invariantsQARMAv2
- Contact author(s)
- tim beyne @ esat kuleuven be
- History
- 2023-06-20: approved
- 2023-06-19: received
- See all versions
- Short URL
- https://ia.cr/2023/963
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2023/963,
author = {Tim Beyne},
title = {An invariant of the round function of QARMAv2-64},
howpublished = {Cryptology ePrint Archive, Paper 2023/963},
year = {2023},
note = {\url{https://eprint.iacr.org/2023/963}},
url = {https://eprint.iacr.org/2023/963}
}
