Question-3; Consider the CBC mode of operation and assume that the initial vector is IV = (10010110), the message symbols are length-8 binary strings. Use decryption CBC method to decrypt the bellow Ciphertext (C) by using decryption key k = (I, ITs) where the substitution operation operates first. C = (C,Cn-1,.... C3, C2, C1) = 1110 0111 1101 0110 0100 0011 S = 0 1 2 3 4 5 6 7 8 9 A B C D E F 8 B 50 F2 D 4 A 6 9 1 E C 3 7 T= 1 5 2 3 4 5 6 7 8 1 4 6 3 7 8 2 Question-3; Consider the CBC mode of operation and assume that the initial vector is IV = (10010110), the message symbols are length-8 binary strings. Use decryption CBC method to decrypt the bellow Ciphertext (C) by using decryption key k = (I, ITs) where the substitution operation operates first. C = (C,Cn-1,.... C3, C2, C1) = 1110 0111 1101 0110 0100 0011 S = 0 1 2 3 4 5 6 7 8 9 A B C D E F 8 B 50 F2 D 4 A 6 9 1 E C 3 7 T= 1 5 2 3 4 5 6 7 8 1 4 6 3 7 8 2