In Short

Nexus Imprint is Google's own fingerprint authentication feature, first made available on the Nexus 5X and Nexus 6P. Using your fingerprint, Nexus Imprint allows you to authenticate on your device to unlock it, use Android Pay, and even make Google Play purchases. Fingerprints are recognized in less than 600 milliseconds. The hardware used for Nexus Imprint stays separated from the rest of the device, keeping it more secure and better protected from hacks or malware. The sensor can also be used as verification for third-party banking and commerce apps as they add support.