Paper 2024/103 Original: eprint.iacr.org/2024/103 ↗
ChaCha related 64 bit oriented ARX cipher
Abstract
A cipher scheme related to ChaCha [Ber] with the variation of using 64 bit operations instead of 32 bits, and the same 512 bit state size, is presented. We will provide strong argumentation to assert that the same security of ChaCha can be obtained with less number of instructions for 24 rounds, instead of Chacha's 20 rounds. Also, an strategy to implement this cipher on SIMD extensions is presented, with a maximal throughput of about 4 bytes per cycle on a 256 bit SIMD extension with at least 11 vector registers.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2024-02-06: last updated
- 2024-01-23: published
- Short URL
- https://ia.cr/2024/103
- License
- https://creativecommons.org/publicdomain/zero/1.0/
BibTeX
@misc{cryptoeprint:2024/103,
author = {Daniel Nager},
title = {ChaCha related 64 bit oriented ARX cipher},
howpublished = {Cryptology {ePrint} Archive, Paper 2024/103},
year = {2024},
url = {https://eprint.iacr.org/2024/103}
}