MARS (cipher)

This article may be deleted soon.
	To oppose or discuss a nomination, please go to CZ:Proposed for deletion and follow the instructions. For the monthly nomination lists, see Category:Articles for deletion. MARS is a block cipher designed by IBM as a candidate for the AES competition; it was chosen as a finalist, but did not win. Like all AES candidates, it uses 128-bit blocks and supports key sizes of 128, 192 or 256 bits. It uses a variant of the Feistel structure which they call a "type 3 Feistel network"; the 128-bit block is treated as four 32-bit sub-blocks; each round uses one sub-block as input and modifies all of the other three sub-blocks. Like RC6, it uses data-dependent rotations. One 9*32 S-box is used; for some operations it is treated as two 8*32 S-boxes. The cipher is now freely available. It has a home page.