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Consider the following MAC for messages of length E(n) 2n-2 using a pseudorandom function F: On input a message mol|mi (with molm-n-1) and key k

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Consider the following MAC for messages of length E(n) 2n-2 using a pseudorandom function F: On input a message mol|mi (with molm-n-1) and key k 0,1, algorithm Mac outputs tFk(0llmo)Fk(1mi). Algorithm Vrfy is defined in the natural way. Is (Gen, Mac, Vrfy) secure? Prove your

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