Multiple choice

Which of the following statements is false about Message Authentication Code (MAC)?

  1. MAC uses an algorithm that creates a small fixed-sized block.

  2. It uses both secret key as well as public key to generate a small fixed-size block of data.

  3. It provides assurance that message is unaltered and comes from sender.

  4. MAC algorithm need not be reversible.

  5. MAC does not work like a digital signature.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is false at it only uses a secret key for that and not any public key.

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