Paper 2014/985 Original: eprint.iacr.org/2014/985 ↗
Statistical weakness in Spritz against VMPC-R: in search for the RC4 replacement
Abstract
We found a statistical weakness in the Spritz algorithm designed by Ronald L. Rivest and Jacob C. N. Schuldt. For N=8: Prob(output(x)=output(x+2)) = 1/N + 0.000498. The bias becomes statistically significant (for N=8) after observing about 2^21.9 outputs. Analogous bias occurs for N=16. We propose an algorithm (VMPC-R) which for N=8 produced 2^46.8 (31 million times more) outputs which remained undistinguishable from random in the same battery of tests. Supported by a series of additional statistical tests and security analyses we present VMPC-R as an algorithm we hope can be considered a worthwhile replacement for RC4.
Metadata
- Available format(s)
PDF- Category
- Secret-key cryptography
- Publication info
- Preprint.
- History
- 2014-12-10: last updated
- 2014-12-10: published
- Short URL
- https://ia.cr/2014/985
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2014/985,
author = {Bartosz Zoltak},
title = {Statistical weakness in Spritz against VMPC-R: in search for the RC4 replacement},
howpublished = {Cryptology {ePrint} Archive, Paper 2014/985},
year = {2014},
url = {https://eprint.iacr.org/2014/985}
}