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This exercise is from Introduction to Modern Cryptography (2nd Edition) by Katz & Lindell Assume collision-resistant hash functions exist. Show a construction of a fixed-length

This exercise is from Introduction to Modern Cryptography (2nd Edition) by Katz & Lindell
Assume collision-resistant hash functions exist. Show a construction of a fixed-length hash function (Gen, h) that is not collision resistant, but such that the hash function (Gen, H) obtained from the Merkle-Damgard transform to (Gen, h) is collision resistant. Assume collision-resistant hash functions exist. Show a construction of a fixed-length hash function (Gen, h) that is not collision resistant, but such that the hash function (Gen, H) obtained from the Merkle-Damgard transform to (Gen, h) is collision resistant

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