Block cipher/Catalogs/Cipher list

Ciphers of the Data Encryption Standard generation, all with 64-bit block size, include:
 * The Data Encryption Standard itself, the first well-known Feistel cipher, using 16 rounds and eight 6 by 4 S-boxes.
 * The GOST cipher, a Soviet standard similar in design to DES, a 32-round Feistel cipher using eight 4 by 4 S-boxes.
 * IDEA, the International Data Encryption Algorithm, a European standard, not a Feistel cipher, with only 8 rounds and no S-boxes.
 * RC2, a Feistel cipher from RSA Security which was approved for easy export from the US (provided it was used with only a 40-bit key), so widely deployed.
 * RC5, a Feistel cipher from RSA security. This was fairly widely deployed, often replacing RC2 in applications.
 * CAST-128, a widely used 16-round Feistel cipher, with 8 by 32 S-boxes.
 * Blowfish, another widely used 16-round Feistel cipher with 8 by 32 S-boxes.
 * The Tiny Encryption Algorithm, or TEA, designed to be very small and fast but still secure, a 32-round Feistel cipher without S-boxes.
 * Skipjack, an algorithm designed by the NSA for use in the Clipper chip, a 32-round unbalanced Feistel cipher.
 * SAFER and LOKI, two families of ciphers which each included an original version against which Lars Knudsen found an attack and a revised version to block that attack. Each had a descendant which was an AES candidate.