Fingerprints
From Just Solve the File Format Problem
Fingerprints of humans are supposedly unique, and sometimes used to track down criminals or to authenticate access to systems.
Toeprints have similar sorts of patterns, but are less-used since shoes and socks usually get in the way of their being left in accessible places.
See also
- ANSI 378 (used to store minutae of fingerprints)
- ANSI 381 (used to store images of fingerprints)
- ISO 19794-2 (used to store minutae of fingerprints)
- NIST IHead
- WSQ (used to store images of fingerprints)