StreamHash is an alternative family of cryptographic hash functions, designed for maximum speed, while being reasonably secure at the same time. As far as I know, it’s not used in any production software, but is not completely fringe too - it was submitted to the SHA-3 competition and prompted a few academic publications. StreamHash5 is the newest member of the family. It was created as an improved version of StreamHash4, after I implemented a practical collision attack for it 1. In this bl...
