Description: The basic requirements of the AES symmetric block ciphers. AES encrypted data block length is fixed at a 128-bit key length can be 128, 192, or 256 bits. AES encryption and many rounds of duplication and transformation. Roughly as follows: 1, the key expansion (by KeyExpansion is). 2, the initial round (the Initial the Round). 3, repeat round (Rounds,). Each round consists of four different stages, including a confusing and three substitution: byte substitution (The SubBytes), line shift (ShiftRows,), columns confusion (The MixColumns routine), the round keys (The AddRoundKey operation). 4, the final round (Final the Round). The final round is not listed confused.
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AES.c
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