Paper 2021/236
SNOW-Vi: an extreme performance variant of SNOW-V for lower grade CPUs
Patrik Ekdahl, Thomas Johansson, Alexander Maximov, and Jing Yang
Abstract
SNOW 3G is a stream cipher used as one of the standard algorithms for data confidentiality and integrity protection over the air interface in the 3G and 4G mobile communication systems. SNOW-V is a recent new version that was proposed as a candidate for inclusion in the 5G standard. In this paper, we propose a faster variant of SNOW-V, called SNOW-Vi, that can reach the targeted speeds for 5G in a software implementation on a larger variety of CPU architectures. SNOW-Vi differs in the way how the LFSR is updated and also introduces a new location of the tap $T2$ for stronger security, while everything else is kept the same as in SNOW-V. The throughput in a software environment is increased by around 50\% in average, up to 92 Gbps. This makes the applicability of the cipher much wider and more use cases are covered. The security analyses previously done for SNOW-V are not affected in most aspects, and SNOW-Vi provides the same 256-bit security level as SNOW-V.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Published elsewhere. ACM WiSec 2021
- DOI
- 10.1145/3448300.3467829
- Keywords
- SNOWStream Cipher5G Mobile System Security
- Contact author(s)
- alexander maximov @ ericsson com
- History
- 2021-06-25: revised
- 2021-03-02: received
- See all versions
- Short URL
- https://ia.cr/2021/236
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2021/236,
author = {Patrik Ekdahl and Thomas Johansson and Alexander Maximov and Jing Yang},
title = {{SNOW}-Vi: an extreme performance variant of {SNOW}-V for lower grade {CPUs}},
howpublished = {Cryptology {ePrint} Archive, Paper 2021/236},
year = {2021},
doi = {10.1145/3448300.3467829},
url = {https://eprint.iacr.org/2021/236}
}
