We say random seeming because hash algorithms are deterministic: if you put in the same input, you get the same output. Anyway, I was also trying to give arguments to defend that 4 bytes don't give us a negligible probability of collision, but with a good hash function that can be useful for a visual versioning control. The meat was these lines, trivial . 7.8. xxHash - Extremely fast non-cryptographic hash algorithm Created by Jack O'Connor, Jean-Philippe Aumasson, Samuel Neves, and Zooko Wilcox-O'Hearn, BLAKE3 combines general purpose Cryptographic Hash VS MAC: What You Need To Know - Doctrina Implementing our Own Hash Table with Separate Chaining in Java To use shorten Lamport signatures with a hash ladder in implementation, we need to chop up the hash to be signed into chunks with not very many bits (8-16) and create a ladder for each. Short integer solutions (SIS) - CryptoBook The open source Git project has just released Git 2.11.0, with features and bugfixes from over 70 contributors. A non-cryptographic hashing function is basically something that takes a string and converts it to another string in a predictable fashion and it tries to do it with as few clashes as possible and as fast as possible. For those who are interested, the probability of collision, then size of the hash destination, and the number of objects chosen are related by this formula: Choosing from N items, with N large, and wanting a probability T of having no collisions, the number of items you can choose at random with replacement is: k ~ sqrt( -2 N ln(T) ) When you take all these into consideration, hopefully you will begin to see how various actions might impact how the commit hash is formed. Powered By GitBook. 2^80 is 1.2 x 10^24 or 1 million billion billion. > >> How does Git(Hub) handle possible collisions from short SHAs? Collision Hash Probability Java [7VQ2KX] I don't have a source for this, but I've heard (in the context of git) that the probability of two different files having the same sha1sum is about the same as the probability of every .
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