4. The polynomial cts) is said to be the ofa(x) and b(x) ífda) divides both (1 p

Question

4. The polynomial cts) is said to be the ofa(x) and b(x) ífda) divides both (1 point) a(x) and b(x) and any divisor of a(x) and b(x) is a divisor of c(x). 5. The byte substitution used in AES contributes to the diffusion feature of the technique. (1 point) a) True b) False Correct/Justify: 6. The Mixing Columns-bytes is the missing transformation in the last stage of the AES. (I point) a) True b) False Correct/Justify 7. In AES, the arithmetic operations of addition, multiplication and division are performed over the finite field a) z, c) GF(2*) d) GF(2) (I point) 8. In the AddRoundKey transformation the 128 bits of the State matrix are bitwise XORed with (I point) the of the round key a) 64 bits b) 256 bits c) 128 bits d 512 bits

Explanation / Answer

4) a

5) b

6) d

7) a

8) b

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