What are biometrics?

 

 

Biometrics use the fact that individual human beings have characteristics that are unique to them. Examples are fingerprints, retina patterns, DNA
In each case, there is no need to store the whole pattern to identify an individual, certain points are stored and can be matched. This means that it is impossible to recreate the scan or specimen from the data held. Systems can only check to see if the current specimen matches one held in their database. See reliability...