Sensing characteristics of adjacent fingers for user authentication

摘要

To authenticate a user, fingerprint data for multiple fingers of the user fingers is sensed by a fingerprint sensor (504). Each of these multiple fingers is situated adjacent to at least one other of these multiple fingers while the fingerprint data is being sensed by the fingerprint sensor. Various characteristics of the user's fingers can be analyzed (506) as part of the user authentication, such as the length of the user's fingers relative to one another, the width of the user's fingers relative to one another, the locations of minutiae of one of the user's fingerprints relative to the locations of minutiae of other of the user's fingerprints, and so forth.

主权项

1. A device comprising:
a fingerprint sensor; and one or more modules configured to perform acts comprising:
detecting multiple fingers of a user touching the fingerprint sensor, each of the multiple fingers being situated adjacent to one or more others of the multiple fingers while touching the fingerprint sensor;identifying a boundary line separating two fingers of the multiple fingers;obtaining data identifying locations of minutiae of a fingerprint of at least one of the two fingers relative to locations of minutiae of a fingerprint of the other of the two fingers based on the boundary line;determining, for each of the multiple fingers, a minutiae area based on the boundary line and a crossing line that runs approximately tangent to a tip of the finger;activating a high resolution mode of only a portion of the sensor, the portion of the sensor comprising the minutiae areas of the multiple fingers; andproviding the obtained data to an authentication module to authenticate the user.