Which components does HMAC use to determine the authenticity and integrity of a message? (Choose two.)

A.
The password

B.
The hash

C.
The key

D.
The transform set

Explanation:
BD
In cryptography, a keyed-hash message authentication code (HMAC) is a specific type of message
authentication code (MAC) involving a cryptographic hash function and a secret cryptographic key. It may be
used to simultaneously verify both the data integrity and the authentication of a message.
Source: https://en.wikipedia.org/wiki/Hash-based_message_authentication_code