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(4 points) In this problem we will work through a round of DES. For notational simplicity, assume it is the first round. Please enter all answers as strings of O's and 1's. The input is the 64 bit block 0000000010001000000000000000000000000000000000000000010100000000 Suppose that the subkey for the current round is this 48 bit number: 010000000000000000000000000000000000000000000000 What does the 64 bit state look like after the IP transformation is applied to the input? 0000000010001000000000000000000 0000000000000000001010 Now find Lo and Ro, the left and right halves of the state. Lo = 0000000010000000 R = 00000001000011010000 What is the result of applying the expansion box to Ro? E(Ro) = 0000000000101000000000010110101000000000000 What is the result of XORing the subkey with E(RO)? ki E(RO) = 0000000000101000000000010110101000000000000 We now apply the S-box transformation. S(ki E(R) = 00101100010011100000010000100 Finally we apply the permutation box to complete the function f. f(Ro) = P(S(k, E(R))) = 00000000010010110001111001111 We can now compute the state of DES going into the next round. L1 = 00000001000011010000 R = 0000000001001011000101100111 (4 pointed in this problem we will work through a round of DES For notation simplicity assume it in the first round Piasentorlanwees as strings of OS and 1 The input in the 64 bit block 00000000100010000000000000 0000000000000000010100000000 Suppose that the way for the current round in this 48 bit number 0100000000000 0000000000000000000 What do the bill to look like at the domation tooled to the rout? 000000000000CCC000100000000000 Now in Lo and Rothe left and rights of the state L-00000 000000000000000 No 0000000000011010000 What is the result of yng the nation box to KR) - 00000000001010000000000101101010000000000000 What in the result ofXoRing the way wm BRY NORR-0000000000000000000001011010100000000000 Www.theboxomion SKR) - 1011001001110001000100111 7) PS, OR 0000000000101100000111000 View come to state of Osing the round - 000000000000 HOO.OOO010010110001010000 (4 points) In this problem we will work through a round of DES. For notational simplicity, assume it is the first round. Please enter all answers as strings of O's and 1's. The input is the 64 bit block 0000000010001000000000000000000000000000000000000000010100000000 Suppose that the subkey for the current round is this 48 bit number: 010000000000000000000000000000000000000000000000 What does the 64 bit state look like after the IP transformation is applied to the input? 00000000000000000000100000000000 Now find Lo and Ro, the left and right halves of the state. Lo = 00000000000000000000100000000000 R = 00000001000011010000 What is the result of applying the expansion box to Ro? E(RO) = 000000000010100000000001011010100000000000000000 What is the result of XORing the subkey with E(Ro)? k; E(Ro) = 000000000010100000000001011010100000000000001000 We now apply the S-box transformation. Sck; E(R)) = 00101100010011100000010000100111 Finally we apply the permutation box to complete the functions. $(Ro) = P(S(K, E(R))) = 00000000010010110001111001111000 We can now compute the state of DES going into the next round. L = 0000000000000000000010000000000C R = 00000000010010110001011001111006 (4 points) In this problem we will work through a round of DES. For notational simplicity, assume it is the first round. Please enter all answers as strings of O's and 1's. The input is the 64 bit block 0000000010001000000000000000000000000000000000000000010100000000 Suppose that the subkey for the current round is this 48 bit number: 010000000000000000000000000000000000000000000000 What does the 64 bit state look like after the IP transformation is applied to the input? 0000000010001000000000000000000 0000000000000000001010 Now find Lo and Ro, the left and right halves of the state. Lo = 0000000010000000 R = 00000001000011010000 What is the result of applying the expansion box to Ro? E(Ro) = 0000000000101000000000010110101000000000000 What is the result of XORing the subkey with E(RO)? ki E(RO) = 0000000000101000000000010110101000000000000 We now apply the S-box transformation. S(ki E(R) = 00101100010011100000010000100 Finally we apply the permutation box to complete the function f. f(Ro) = P(S(k, E(R))) = 00000000010010110001111001111 We can now compute the state of DES going into the next round. L1 = 00000001000011010000 R = 0000000001001011000101100111 (4 pointed in this problem we will work through a round of DES For notation simplicity assume it in the first round Piasentorlanwees as strings of OS and 1 The input in the 64 bit block 00000000100010000000000000 0000000000000000010100000000 Suppose that the way for the current round in this 48 bit number 0100000000000 0000000000000000000 What do the bill to look like at the domation tooled to the rout? 000000000000CCC000100000000000 Now in Lo and Rothe left and rights of the state L-00000 000000000000000 No 0000000000011010000 What is the result of yng the nation box to KR) - 00000000001010000000000101101010000000000000 What in the result ofXoRing the way wm BRY NORR-0000000000000000000001011010100000000000 Www.theboxomion SKR) - 1011001001110001000100111 7) PS, OR 0000000000101100000111000 View come to state of Osing the round - 000000000000 HOO.OOO010010110001010000 (4 points) In this problem we will work through a round of DES. For notational simplicity, assume it is the first round. Please enter all answers as strings of O's and 1's. The input is the 64 bit block 0000000010001000000000000000000000000000000000000000010100000000 Suppose that the subkey for the current round is this 48 bit number: 010000000000000000000000000000000000000000000000 What does the 64 bit state look like after the IP transformation is applied to the input? 00000000000000000000100000000000 Now find Lo and Ro, the left and right halves of the state. Lo = 00000000000000000000100000000000 R = 00000001000011010000 What is the result of applying the expansion box to Ro? E(RO) = 000000000010100000000001011010100000000000000000 What is the result of XORing the subkey with E(Ro)? k; E(Ro) = 000000000010100000000001011010100000000000001000 We now apply the S-box transformation. Sck; E(R)) = 00101100010011100000010000100111 Finally we apply the permutation box to complete the functions. $(Ro) = P(S(K, E(R))) = 00000000010010110001111001111000 We can now compute the state of DES going into the next round. L = 0000000000000000000010000000000C R = 00000000010010110001011001111006

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