CS-Cipher

Infobox block cipher
name = CS-Cipher
designers = Jacques Stern and Serge Vaudenay
publish date = 1998
derived from =
derived to =
related to =
key size = 128 bits
block size = 64 bits
structure = Feistel network
rounds = 8
cryptanalysis =

In cryptography, CS-Cipher (for "Chiffrement Symétrique") is a block cipher invented by Jacques Stern and Serge Vaudenay in 1998. It was submitted to the NESSIE project, but was not selected.

The algorithm uses a key length between 0 and 128 bits (length must be a multiple of 8 bits). By default, the cipher uses 128 bits. It operates on blocks of 64 bits using an 8-round Feistel network and is optimized for 8-bit processors. The round function is based on the Fast Fourier transform and uses the binary expansion of e as a source of "nothing up my sleeve numbers".

References

* cite paper
author = J. Stern, S. Vaudenay
title = CS-Cipher
date = 1998
url = http://lasecwww.epfl.ch/pub/lasec/doc/SV98.ps
format = PostScript
accessdate = 2007-02-15