Question: (10 points) It is noted that given the CBC MAC of a one-block message X, say T=MAC(K,X) and K is the corresponding key, the adversary

(10 points) It is noted that given the CBC MAC of

(10 points) It is noted that given the CBC MAC of a one-block message X, say T=MAC(K,X) and K is the corresponding key, the adversary immediately knows the CBC MAC for the twoblock message X(XT). What the MAC is and justify your answer. Figure 12.7 Data Authentication Algorithm (FIPS PUB 113) (16 to 04 bits)

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