Sensor-assisted biometric authentication for smartphones
First Claim
1. A portable electronic device, comprising:
- an imaging sensor that, selectively during operation of the portable electronic device, acquires one or more images;
a processor electrically coupled to the imaging sensor; and
memory, electrically coupled to the processor, which stores a program module that, selectively during operation of the portable electronic device, is executed by the processor, the program module including instructions for;
providing an instruction to a user to move the portable electronic device relative to a face of the user;
acquiring, using the imaging sensor, a series of images while the portable electronic device is at different positions relative to the face of the user, wherein the series of images include at least two images relative to a symmetry axis of the face of the user;
determining a change in a sign of a nose angle in at least the two images; and
authenticating the user based on at least one of the series of images using a facial-recognition technique.
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Accused Products
Abstract
During a technique for authenticating a user using a portable electronic device (such as a smartphone) while preventing successful 2D media attacks and virtual-camera attacks, the portable electronic device provides an instruction to a user to move the portable electronic device relative to the user'"'"'s face. Then, using an imaging sensor in the portable electronic device, the portable electronic device acquires, a series of images while the portable electronic device is at different positions or orientations relative to the user'"'"'s face, where the series of images include at least two images relative to a symmetry axis of the user'"'"'s face (such as the midline). Moreover, the portable electronic device determines a change in a sign of a nose angle in at least the two images. Next, the portable electronic device authenticates the user based on at least one of the series of images using a facial-recognition technique.
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Citations
20 Claims
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1. A portable electronic device, comprising:
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an imaging sensor that, selectively during operation of the portable electronic device, acquires one or more images; a processor electrically coupled to the imaging sensor; and memory, electrically coupled to the processor, which stores a program module that, selectively during operation of the portable electronic device, is executed by the processor, the program module including instructions for; providing an instruction to a user to move the portable electronic device relative to a face of the user; acquiring, using the imaging sensor, a series of images while the portable electronic device is at different positions relative to the face of the user, wherein the series of images include at least two images relative to a symmetry axis of the face of the user; determining a change in a sign of a nose angle in at least the two images; and authenticating the user based on at least one of the series of images using a facial-recognition technique. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A non-transitory storage medium storing instructions executable by a processor of a portable electronic device, the instructions comprising:
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instructions for providing an instruction to the user to move the portable electronic device relative to a face of the user; instructions for acquiring, using an imaging sensor in the portable electronic device, a series of images while the portable electronic device is at different positions relative to the face of the user, wherein the series of images include at least two images relative to a symmetry axis of the face of the user; instructions for determining a change in a sign of a nose angle in at least the two images; and instructions for authenticating the user based on at least one of the series of images using a facial-recognition technique. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A method for authenticating a user, wherein the method comprises:
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providing an instruction to the user to move a portable electronic device relative to a face of the user; using an imaging sensor in the portable electronic device, acquiring a series of images while the portable electronic device is at different positions relative to the face of the user, wherein the series of images include at least two images relative to a symmetry axis of the face of the user; determining a change in a sign of a nose angle in at least the two images; and authenticating the user based on at least one of the series of images using a facial-recognition technique.
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Specification