A fingerprint reader is a biometric device that utilizes a person’s unique fingerprints to let them into or out of a certain place or equipment.

It takes a picture of a person’s fingerprints and checks it against a record that already exists to make sure they are who they say they are. Fingerprint scanners are used in security systems, such those used in buildings, computers, and mobile devices, since they are thought to be safer than regular passwords or keys. But they are most trustworthy, like biometric authentication techniques like face recognition.