Using fingerprints is the oldest method of identification.
In the digital world, the fingerprint is electronically read by a sensor plate.
The corrugated ridges of the skin are non-continuous and form a pattern that has distinguishing features, or minutiae.
The minutiae can be plotted and joined up to form a template that can be stored and compared against fingerprints in the future.
Some readings may be affected by fingerprints that have been damaged through injury and some sensors may not be able to read fingers that are too wet or too dry.
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