DES each packet is 64, both explicit and are 64-bit key (actual key 56, the first 8 bytes each for validation). The core of this algorithm are Feistel password, because of its ingenious design, encryption and decryption using a function, specifically the principle of access to other information requested. DES is the implementation of the basic flow of 16 the following operations:

DES算法原理.doc

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