In AES, each round of encryption involves 4 layers except for the first round, middle round, and last round. The 25th round is also an exception.
QUESTION 11
For their shared secret key, which option is correct?
O 11
O 04
O 03
QUESTION 12
Suppose Alice and Bob decide to use an affine cipher with a 40-letter alphabet. What is the keyspace size for such a cipher?
O 40!
O 640 (2^40)
QUESTION 13
Which of the following numbers is not a multiple of 4?
O 06
O 12
O 15