Fingerprint scanner are biometric security systems. Used to unlock doors as well as for other security purposes. Fingerprint scanners on mobile phones became commonplace in the 2010s. People’s fingers have a ridge pattern. Fingerprints do not remove or change. Fingerprints differ.

Typically, a fingerprint scanner works by first recording fingerprint scans of all authorized individuals for a specific system or facility. Scans are archived in a database. The user who needs access places his or her finger on a hardware scanner. It scans and copies the individual’s input and searches for similarities in previously stored scans. It grants the individual access.