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A cryptographic hash algorithm is a function which takes a variable size input and produces a fixed size output. The algorithm makes it difficult to find two inputs with the same output or reconstruct the input from the output.

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How to create two partly similar plaintexts with same MD5 hash value?

The goal is to modify these syntactically but not semantically, and achieve the variants' MD5 hash (or at least the hash values' first 4 bytes) to be the same. … I know, that MD5 hash collisions can occur, but how could I implement it in a programming language (e.g. Python) which is not brute force? Is there any way to check which letters to change? …
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