Which of the following MUST Matt, a security administrator, implement to verify both the integrity
and authenticity of a message while requiring a shared secret?

A.
RIPEMD

B.
MD5

C.
SHA

D.
HMAC

Explanation:
HMAC (Hash-Based Message Authentication Code) uses a hashing algorithm along with a
symmetric key. The hashing function provides data integrity, while the symmetric key provides
authenticity.