Fingerprint

Fingerprint is an impression of the friction ridges of all or any part of the finger.
The details of this ridges and are called minutiae. It is the distinctiveness of these minutiae that gives each individual a unique fingerprint. An individual places his finger on a device that reads the details of the fingerprint and compares this to a reference file. If the two match, the individual’s identity has been verified.

This resource is used as type of access control using Biometric.

Video - MythBusters versus a fingerprint scanner