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Prove unconditionally the existence of a pseudorandom function F : {0,1}* {0,1}* {0,1}* with l key(n) = n and l in(n) = O(logn). Hint: Implement

Prove unconditionally the existence of a pseudorandom function F : {0,1}* {0,1}* {0,1}* with l key(n) = n and l in(n) = O(logn).

Hint: Implement a uniform function with logarithmic input length.

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