Question: Let E : {0, 1} n {0, 1} n {0, 1} n be a good PRF. Break the PRF security of FK(X) = EK(X)kEK(EK(X)) and

Let E : {0, 1} n {0, 1} n {0, 1} n be a good PRF. Break the PRF security of FK(X) = EK(X)kEK(EK(X)) and analyze the advantage of your attack.

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