If randomness is needed to enhance security in generating a message digest, a key can be used as part of the message digest generation. This key using algorithm is known as a(n) ____.
A) HCRC
B) MD
C) MAC
D) CRC

Question

Quizplus · Accepted Answer

MAC stands for Message Authentication Code and is a key-based algorithm used for message digest generation. HCRC (Hamming Code Checksum) and CRC (Cyclic Redundancy Check) are also algorithms used for error detection, but they do not use keys for randomness. MD (Message Digest) is a term used interchangeably with hash functions, which can use keys for added security, but not all hash functions do. Therefore, the best choice is C, MAC.

If Randomness Is Needed to Enhance Security in Generating a Message