I'm working on a data annotation system based around Rabin fingerprints. They're a really neat idea.

I especially like how if you end up with hash characteristics that you don't like, your can just select a different irreducible Galois polynomial and now you've got a whole new hash algorithm. It's like tuning to a different frequency.

For me it means I don't have to worry about cases where there aren't enough nearby fingerprints for the annotation to adhere to, I can just add or remove polynomials until I get a good density.