Question: Suppose that Alice is using a MAC to provide message integrity. Alice and Bob share a symmetric key k , and Alice uses this key

Suppose that Alice is using a MAC to provide message integrity. Alice and Bob share a symmetric key k, and Alice uses this key k to calculate the MAC when sending a message to Bob.Bob claims that Alice sent the message M="I will pay you $2000" to him, but Alice denies ever sending the message. Bob sues Alice, and in court, Bob shows Judge Judy a MAC (produced using the key k) that matches the message M.Is this a valid, conclusive proof that Alice sent the message? Justify your answer.

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