56 BIT⚷-64 BITS▣-16 ⟳-FEISTEL - DES SYMMETRIC BLOCK, 56 BIT⚷-64 BITS▣-16 ⟳-FEISTEL - DES3 (Runs DES 3 times) SYMMETRIC BLOCK, 128,192 & 256 BITS ⚷-128 BITS ▣- 10 (128), 12 (192), 14 (256) ⟳-SUBSTITUTION- PERMUTATION, Rijyndael cipher - AES SYMMETRIC BLOCK, UP TO 256 BITS⚷-64 BITS▣-16 ⟳-FEISTEL, in BCrypt, CrashPlan, Cryptodisk, DriveCrypt - BLOWFISH SYMMETRIC BLOCK, UP TO 256 BITS⚷-128 ▣-16 ⟳-FEISTEL - TWO FISH (Designed to replace DES) SYMMETRIC BLOCK, 80 BITS⚷-64 BITS ▣-32 ⟳-UNBALANCE FEISTEL - SKIPJACK (Design by NSA for the Clipper Chip) SYMMETRIC BLOCK, 128 BITS⚷-64 BITS▣-8 ⟳-Lai-Massey Scheme - IDEA SYMMETRIC BLOCK, up to 2048⚷-32, 64, 128 BITS▣-up to 255⟳ - RC5 & RC6 (Faster version of RC5) SYMMETRIC BLOCK, 128,192, & 256 BITS-128 BITS▣-32 ROUNDS⟳-much stronger than AES but slower - SERPENT SYMMETRIC BLOCK, 1-256⚷-up to 255 ⟳ - RCA SYMMETRIC STREAM, 2064 bit state size, 1-2048 bit key size (40 bit minimum recommended), 1 round, Weak stream cipher/ used in SSL & Web f/ wifi security/ RFC 7465 prohibits use in TLS - RC4 SYMMETRIC STREAM,

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