MacGuffin (cipher)
In cryptography, MacGuffin is a block cipher created in 1994 by Bruce Schneier and Matt Blaze at a Fast Software Encryption, Fast Software Encryption workshop. It was intended as a catalyst for analysis of a new cipher structure, known as Generalized Unbalanced Feistel cipher, Feistel Networks (GUFNs). The cryptanalysis proceeded very quickly, so quickly that the cipher was broken at the same workshop by Vincent Rijmen and Bart Preneel. The algorithm Schneier and Blaze based MacGuffin on Data Encryption Standard, DES, their main change being that the data block is not split into equal halves in the Feistel network. Instead, 48 bits of the 64-bit data block are fed through the round function, whose output is XORed with the other 16 bits of the data block. The algorithm was experimental, intended to explore the security properties of unbalanced Feistel networks. The adjacent diagram shows one round of MacGuffin. The 64-bit data block is broken into four 16-bit words (each represent ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]