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Question

In CMAC, which scenario is a different key K2 is used instead of K1?

a.

If the tag is larger than the key length

b.

If the tag is shorter than the key length

c.

In the last step of the algorithm

d.

If the plaintext/message is not an integer multiple of the cipher clock length

Posted under Cryptography and Network Security

Answer: (d).If the plaintext/message is not an integer multiple of the cipher clock length

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Q. In CMAC, which scenario is a different key K2 is used instead of K1?
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