Answer Happy

S-Box: The s-box is designed to be resistant to known cryptanalytic attacks. Therefore, the same byte should not ne substituted by itself and the sum of two bytes X and Y should mot be substituted with Sub(X)+Sub(Y). How to read S-Box: Each column and row entry is a 4 bit HEX number. One Column Entry and one Row Entry together make one byte (8-bit). In addition, each cell entry is a byte, represented in HEX. Replace a "Byte" formed by a pair of "Column Entry-Row Entry" with the corresponding "Cell Entry." For instance: "71" is replaced by "A3"; in binary 01110001 is substituted with 10100011. X X 0 1 2 3 4 5 6 7 8 9 a b C d e f 0123 S DUO 01 2 3 4 63 7C 77 7B 5 6 F2 6B 6F C5 FA 59 47 FO 36 3F F7 CC CA 82 C9 7D B7 FD 93 26 04 C7 23 C3 18 09 83 2C 1A 1B 6E 5A AO 53 D1 00 ED DO EF AA 51 A3 40 FB 43 4D 8F 92 5F 97 44 CD EC OC 13 81 4F DC 22 2A 90 60 EO 32 3A OA 49 06 24 06 E7 C8 37 6D 8D D5 4E A9 BA 78 25 2E 1C A6 B4 C6 70 3E B5 66 48 03 F6 OE 61 E1 F8 98 11 8C A1 89 OD 0 1 52 09 7C E3 2 54 e f 3 08 4 72 5 6C 6 90 2 6A 39 T f 76 9C A4 72 CO D8 31 15 80 E2 EB 27 B2 75 52 3B D6 B3 29 E3 2F 84 BE 39 4A 4C 58 CF 02 7F 50 3C 9F A8 20 FC B1 5B 6A CB 33 85 45 F9 9D 38 F5 BC 17 C4 B6 DA 21 10 FF F3 D2 A7 7E 3D 64 5D 19 73 88 46 EE B8 14 DE 5E OB DB 5C C2 D3 AC 62 91 95 E4 79 56 F4 EA 65 7A AE 08 6C E8 DD 74 1F 4B BD 8B 8A C1 1D 9E 86 E9 CE 55 28 DF OF BO 54 BB 16 7B 94 2E A1 F8 F6 7 8 5 6 C d e f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b FC 1F 27 80 EC 5F d 60 93 C9 9C EF 83 53 99 61 69 14 63 55 21 OC 7D AES Inverse S-box 3 4 D5 30 82 9B 32 A6 66 28 64 86 a b c 9 30 01 67 2B AD D4 A2 AF 34 A5 E5 F1 71 96 05 9A 07 12 69 D9 8E 94 9B BF E6 42 68 42 68 41 AES S-box 35 57 B9 1E 87 99 2D Y 7 8 38 BF 87 3D EE 4C B2 76 5B A2 16 D4 A4 d e FE D7 AB 9 a b 40 A3 34 83
The following is the input to the round 1 Byte Substitution Layer in AES. 111110011110100111001001111000011101100111101101001110 1. What will be the output to the Byte Substitution Layer? (15 Points) 2. What will be the output to the ShiftRows Layer? (15 points) For Byte Subtituition, please use the table posted above.