Functions that create collisions can still hashes can't they? Things like CRCs, Checksums are loosely considered hash functions: https://en.wikipedia.org/wiki/

Functions that create collisions can still hashes can't they? Things like CRCs, Checksums are loosely considered hash functions: https://en.wikipedia.org/wiki/List_of_hash_functions https://en.wikipedia.org/wiki/List_of_hash_functions MD5SUM is a classic example of a hash function with a low (but still reasonable) chance of a collision