(Answered): a. 3-3 Problem Solving Set #2 (5 pts each) Find the result of the 2-bit left circular shift on (110 ...

a. 3-3 Problem Solving Set #2 (5 pts each) Find the result of the 2-bit left circular shift on (11000101) in binary and polynomial, respectively. b. Compute the following transformation on (11000101) over GF(2) that is used in the S-Box of the AES. The left-most bit in the binary is b; and the right-most bit is bo. What are the resulting binary and polynomial, respectively? 1 1 0 1 1 0 0 0 10 0 1 1 0 1 1 1 1 1 1 0 O 1 O 0 0 1 0 0 0 O 10 1 1 bo 1 bi 1 b2 1 by o|b4 0 bs 0 b6 1 b 1 0 0 1 1 1 1 o 1 O c. If the input of the S-Box used in the AES is (10101100), it is substituted by in hex and in binary. d. A file whose size is 20 bytes is encrypted using the AES with CBC and OFB, respectively. What will be the size of each encrypted file? 3-4 Problem Solving Set #3 (2 pts each) a. (T/F) Good quality of diffusion makes the relation between ciphertext and the key complex b. (T/F) As long as an initialization vector is randomly chosen, it is safe to use it with the modes of operation that require an IV. C. (T/F) The block size of the AES must be the same as the key size. d. (T/F) The CBC mode does not require padding e. (T/F) The CTR mode does not require an IV