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Brief introduction to AES

2022-07-01 08:34:00 【Little fatty fruit】

AES Add and remove secret pseudocode

  among ,w Indicates the round key ;Nr It means the number of rounds （AES128-10;AES192-12;AES256-14）;AddRoundKey、SubBytes、ShiftRows and MixColumns Next, we will introduce ;

SubBytes

InvSubBytes

ShiftRows

InvShiftRows

MixColumns

InvMixColumns

AddRoundKey

  w It refers to the round key , Obtained by the secret key extension , The secret key extension pseudocode is as follows ：

 RotWord：  Word[a0,a1,a2,a3]   -> Word[a1,a2,a3,a0];

Rcon[i]:    [x^{i-1},0,0,0]

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