Question: ( Message Authentication Codes ) Let MAC = ( Tag , Ver ) is a secure MAC algorithm. Define a new algorithm MAC = (

(Message Authentication Codes) Let MAC =(Tag, Ver) is a secure MAC algorithm. Define
a new algorithm MAC=(Tag, Ver) such that t = Tag(k, m)= Tag(k, m)||Tag(k, m).
(a)(2 points) Prove that MAC is also a secure MAC.

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