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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 hard is it to generate a simultaneous MD5 and SHA1 collision?
The solution seems to be hash algorithms that are very slow in comparison.
I am wondering why can't people combine these fast algorithms to get the best of both security and speed? … And if it's hard enough, would these make a viable candidate for collision resistant hash applications?
(By simultaneous collision I mean generating a string with same MD5 and SHA1) …