Tag Info

Base64 provides a 1:1 transform from input to output (and back again if desired). So if you take a set of unique items and base64 encode all of them they will all be unique. So the question becomes if you run a GUID through SHA1, will the resulting hash have the same uniqueness as the GUID? The answer is practically - yes; theoretically not quite. Multiple ...

Assuming no cosmetics, the length of a GUID is 32 bytes so better question would be "What's the collision probability of SHA1 with 32 bytes of input?" I'm sure someone else will answer with the exact statistics but the answer to your question is yes, it's pretty unique (an attacker has a negligible probability of success). Note that I've completely ignored ...