AES Guest Lecturer

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<strong>AES</strong> Algorithm KeyExpansion(byte key[4*Nk], word w[Nb*(Nr+1)],Nk) Cipher(byte in[4*Nb],byte out[4*Nb],word w[Nb*(Nr+1)]) begin byte state[4,Nb] state = in AddRoundKey(state, w[0, Nb-1]) for round = 1 step 1 to Nr–1 SubBytes(state) ShiftRows(state) MixColumns(state) AddRoundKey(state,w[round*Nb,(round+1)*Nb-1]) end for SubBytes(state) ShiftRows(state) AddRoundKey(state, w[Nr*Nb, (Nr+1)*Nb-1]) out = state end
Sample Conversions Input String Key Output String (HEX) ABCDEFGHIJKLMNOP 11223344556677889900AABBCCDDEEFF BC4784A37D6F46452656B993D53393F5 ABCDEFGHIJKLMNOP 01223344556677889900AABBCCDDEEFF 855866490543FDF6504FC84088FEDCA0 ABCDEFFHIJKLMNOP 11223344556677889900AABBCCDDEEFF 372CCA446C0D391C4381392344630EE1 Input String(HEX) Key Output String (HEX) 00000000000000000000000000000000 00000000000000000000000000000000 66E94BD4EF8A2C3B884CFA59CA342B2E 00000000000000000000000000000000 00000000000000000000000000000001 0545AAD56DA2A97C3663D1432A3D1C84 00000000000000000000000000000001 00000000000000000000000000000001 A17E9F69E4F25A8B8620B4AF78EEFD6F
Page 1 and 2: AES Advanced Encryption Standard CS
Page 3 and 4: AES Block • AES has a fixed block
Page 5 and 6: AES Key or 192 bits (6 words) 11223
Page 7 and 8: Security • The key security featu
Page 9 and 10: AES Algorithm KeyExpansion(byte key
Page 11 and 12: - Sample Key: AES Algorithm Key Exp
Page 13 and 14: AES Algorithm Key Expansion w[0] 11
Page 15 and 16: Con - round Constants Powers of x =
Page 21 and 22: AES Algorithm KeyExpansion(byte key
Page 23 and 24: AES Algorithm AddRoundKey State 41
Page 25 and 26: AES Algorithm SubBytes • SubBytes
Page 27 and 28: AES Algorithm SubBytes X Y 0 1 2 3
Page 29 and 30: AES Algorithm SubBytes State 50 10
Page 31 and 32: AES Algorithm ShiftRows • Simple
Page 33 and 34: AES Algorithm - MixColumns • This
Page 35: AES Algorithm - InvMixColumns a ’
Page 39 and 40: Larger Plain Texts Encryption • H
Page 41 and 42: Larger Plain Texts Encryption Ciphe
Page 43 and 44: Padding • If plaintext messages a
Page 45 and 46: Attacks on AES • XSL Cryptanalysi
Page 47 and 48: Types of Side Channel Attacks • T
Page 49 and 50: Joan Daemen & Vincent Rijmen’s AE
Page 51 and 52: Joan Daemen & Vincent Rijmen’s AE
Page 53 and 54: References Security and Attacking A
Page 55: References Applications / Implement

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