Let (Gen, H) be a collision-resistant hash function, where H maps strings of length 2n to strings of length n. Prove that the function family (Gen, Samp, H) is one-way, where Samp is the trivial algorithm that samples a uniform string of length 2n.
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Let (Gen, H) be a collision-resistant hash function, where H maps strings of length 2n to strings of length n. Prove that the function family (Gen, Samp, H) is one-way, where Samp is the trivial algorithm that samples a uniform string of length 2n.
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