Cryptography | Feistel ciphers

Feistel cipher

In cryptography, a Feistel cipher (also known as Luby–Rackoff block cipher) is a symmetric structure used in the construction of block ciphers, named after the German-born physicist and cryptographer Horst Feistel, who did pioneering research while working for IBM; it is also commonly known as a Feistel network. A large proportion of block ciphers use the scheme, including the US Data Encryption Standard, the Soviet/Russian GOST and the more recent Blowfish and Twofish ciphers. In a Feistel cipher, encryption and decryption are very similar operations, and both consist of iteratively running a function called a "round function" a fixed number of times. (Wikipedia).

Feistel cipher
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Related pages

GOST (block cipher) | Stream cipher | Skipjack (cipher) | Lai–Massey scheme | Format-preserving encryption | Twofish | Pseudorandom permutation | RC2 | Blowfish (cipher) | RC5 | Encryption | Threefish | Triple DES | Oracle machine | Lucifer (cipher) | XTEA | Block cipher | Cryptography | Lifting scheme | RC6 | FEAL | LOKI97 | Skein (hash function) | Camellia (cipher) | Key schedule | MacGuffin (cipher) | Substitution–permutation network | CAST-128 | CAST-256 | Tiny Encryption Algorithm | CLEFIA | Simon (cipher) | Optimal asymmetric encryption padding | Public-key cryptography | MISTY1 | Data Encryption Standard