Question

Which of the following terms is not an input to the CCM encryption?

(a) Nonce.

(b) Associated data.

(c) Plaintext message.

(d) Tag.

I had been asked this question in final exam.

This is a very interesting question from CCM, GCM and Key Wrapping topic in section Message Authentication Codes, Whirlpool Algorithm and Key Management and Distribution of Cryptograph & Network Security

Answer 1

Correct option is (d) Tag.

For explanation I would say: A tag is not involved with CCM.