3 ms·
If you do % 1000 there'll be a bit of bias from the modulus, but not anything meaningful for the use case, and it affects MD5 and SHA both. No argument that fo
by FreakLegion 4y ago
If you do % 1000 there'll be a bit of bias from the modulus, but not anything meaningful for the use case, and it affects MD5 and SHA both.
No argument that for simple incrementing integers a raw modulus is better, though. Even if hashing is needed, a cryptographic hash function probably isn't (depending on threat model, e.g. whether user inputs are involved).
- withinboredom 4y agoMD5 and ShaX are available in almost every language. Things that are probably better (like Murmur3) might not be, or may even have different hashes for the same thing (C# vs JS with Murmur3, for example). I had to reimplement Murmur3 in C# to get the hashes to match from JS, it boiled down to the C# version using longs and eventually casting to an int while JS can’t or didn’t do that final cast.
- FreakLegion 4y agoI wasn't thinking of anything exotic, just the built-in functions used for hash tables and random number generators (for integers and other inputs that can be interpreted as seeds, a random number generator is also a hash function, and of course in your case the hash function was a random number generator all along anyway!).