Paper 2005/164
A Distinguish attack on COSvd Ciphers
Mohammad Ali Orumiehchi ha and Dr. R. Mirghadri
Abstract
Abstract: The COSvd Ciphers has been proposed by Filiol and others (2004). It is a strengthened version of COS stream cipher family denoted COSvd that has been adopted for at least one commercial standard. We propose a distinguish attack on this version, and prove that, it is distinguishable from a random stream. In the COSvd Cipher used one S-Box (10×8) on the final part of cipher. We focus on S-Box and use weakness this S-Box for distinguish attack. In addition, found a leak on HNLL that the sub s-boxes don’t select uniformly. We use this property for an Improve distinguish attack.
Metadata
- Available format(s)
-
PDF
- Category
- Secret-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- Stream cipherCOSvd cipherDistinguish attacknonlinear feedback shift registerschaotic layer.
- Contact author(s)
- maorum @ yahoo com
- History
- 2005-06-06: received
- Short URL
- https://ia.cr/2005/164
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2005/164,
author = {Mohammad Ali Orumiehchi ha and Dr. R. Mirghadri},
title = {A Distinguish attack on COSvd Ciphers},
howpublished = {Cryptology ePrint Archive, Paper 2005/164},
year = {2005},
note = {\url{https://eprint.iacr.org/2005/164}},
url = {https://eprint.iacr.org/2005/164}
}
