Perceptual hash functions aim to imitate human perception by focusing on the types of features that drive human sight and hearing.

does it have to be a physical CD? What about making an image of your CD as an ISO then using the hash program? Especially if it "truly" is a backup copy - you could burn the .ISO to CD itself, not ...

What is Bitcoin’s hash rate? The amount of processing and computing power being given to the network through mining is referred to as Bitcoin’s hash rate. A fixed-length alphanumeric code ...