CSE 651 Homework 6 Due: Wednesday, June 2 by class time 1.Do problem 12.3 on the 5thedition (or 12.10 on the 4th) of Stallings. (This problem shows that CBC-MAC is not secure.) 2.12011Consider CMAC(, ,):, where ||.IV (typically 0)for 1 to 1 do()() returnNow suppose we uselinikiilklllm k kmmmmmncilcEcmcEcmkca random IV (rather than a fixed one) for each message, andlet the tag be IV,. Show that this variant of CMAC is not secure. (For simplicity, assume no padding.)(Hint : Given a legitimate ,CMAClkcm,,(), construct a pair (,) such that
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Trigraph, Cryptographic hash function, success probability