DES Standard Cipher Iterative Key generation Action Boⅹ Input: 64 bits nput: 56 bits Key: 48 bits Output: 48 bits Output: 64 bits One round (Total 16 rounds)5 DES Standard • Cipher Iterative Action : – Input: 64 bits – Key: 48 bits – Output: 64 bits • Key Generation Box : – Input: 56 bits – Output: 48 bits One round (Total 16 rounds)