Fingerprint reader using surface acoustic wave device
First Claim
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1. A biometric sensing system, comprising:
- a surface acoustic wave sensor; and
a modifier which causes the sensor to output a distorted print signal.
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Abstract
An access control method achieves enhanced security and accuracy compared with other systems through recognition of one or more distorted biometrics. The method includes outputting a distorted biometric print from a surface acoustic wave (SAW) device into an identification system, comparing the distorted print to one or more distortion patterns, and controlling access to a restricted item based on results of the comparison. The distorted print maybe formed based on a transfer function or excitation frequency of the SAW device, or may be formed by a mask pattern located on or between a sensing surface of the SAW device. The print may be a fingerprint, thumb print, and palm print.
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Citations
29 Claims
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1. A biometric sensing system, comprising:
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a surface acoustic wave sensor; and
a modifier which causes the sensor to output a distorted print signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A sensor, comprising:
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a detecting surface; and
a modifier which modifies a print detected by the detecting surface. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A method for providing biometric information, comprising:
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modifying a print; and
forming a distorted print signal from the modified print. - View Dependent Claims (24, 26, 27, 28)
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25. The method of claim wherein modifying the print includes:
detecting the print with a surface acoustic wave sensor which operates based on a predetermined excitation frequency.
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29. A method for generating biometric information, comprising:
combining two degrees two degrees of uniqueness, wherein the first degree of uniqueness is a print and second degree of uniqueness is a print modifier.
Specification