|Designers||Jacques Stern and Serge Vaudenay|
|Key sizes||128 bits|
|Block sizes||64 bits|
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".
- J. Stern, S. Vaudenay (1998). "CS-Cipher" (PostScript). Retrieved 2007-02-15. Cite journal requires
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