2. (a) In DES key generation, if the key with parity bit (64 bits) is "133457799BBCDFF1" (hexadecimal), Find the first-r

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2 A In Des Key Generation If The Key With Parity Bit 64 Bits Is 133457799bbcdff1 Hexadecimal Find The First R 1 (166.77 KiB) Viewed 16 times

2. (a) In DES key generation, if the key with parity bit (64 bits) is "133457799BBCDFF1" (hexadecimal), Find the first-round key. 3. 4. (b) What is the output of Substitution-box process of DES encryption for the input block "101111" using given S-BOX. Row # S, 1 1 2 3 0 1 2 3 14 4 13 12 15 0 15 7 4 14 2 41 148 13 6 7 11 8 3 10 6 12 590 7 13 1 10 6 12 11 95 38 2 11 15 12 9 7 3 10 50 15 Column # A group of 19 birds store their food in 23 piles of equal size, each containing more than 1 food item, with a twenty fourth pile of 7 left over. When they divide the food items into 19 equal groups, none remain. What is the smallest number of food item they can have? (Use Chinese remainder theorem) In AES encryption with 128-bit key all consist of Os(Zeros). (a) Determine the first-round key (W4 W5 W6 W7). (b) Show that W8 = W10