CS-Cipher

{{Infobox block cipher

{{Infobox block cipher

| name = CS-Cipher

| name = CS-Cipher

| designers = [[Jacques Stern]] and [[Serge Vaudenay]]

| designers = [[Jacques Stern (cryptographer)|Jacques Stern]] and [[Serge Vaudenay]]

| publish date = 1998

| publish date = 1998

| derived from =

| derived from =

}}

}}

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.

In [[cryptography]], '''CS-Cipher''' (for ''Chiffrement Symétrique'') is a [[block cipher]] invented by [[Jacques Stern (cryptographer)|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 [[central processing unit|processor]]s. The round function is based on the [[fast Fourier transform]] and uses the binary expansion of [[e (mathematical constant)|e]] as a source of "[[nothing up my sleeve number]]s".

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 [[central processing unit|processor]]s. The round function is based on the [[fast Fourier transform]] and uses the binary expansion of [[e (mathematical constant)|e]] as a source of "[[nothing up my sleeve number]]s".