Which part(s) of CAIN is realized through the use of message digest functions and hashes?

Integrity

Explanation:

In CAIN, integrity is realized through the use of message digest functions and hashes.

Integrity in CAIN simply means securing a message on transit without it being tampered. To accomplish and achieve integrity, hash functions are used. These hash functions receive arbitrary length message and bring out a fixed sized message digest.

The message digest and hash function maps input data of arbitrary length to an output fixed data length. Hashing is used to guarantee integrity.