| 摘要 |
A system and method is provided for selectively activating biometric sensors ( 102, 104, 106 ) to authenticate the identity of an individual while conserving system resources. A biometric system has at least two tiers of sensors, first ( 102 ) and second tier sensors ( 104, 106 ), where the first tier sensors ( 102 ) are characteristically less sophisticated and less expensive to operate than the second tier sensors ( 104, 106 ). One or more of the second tier sensors ( 104, 106 ) are activated only after a user's biometric is successfully or unsuccessfully verified by one of the first tier sensors ( 102 ). Alternatively, the second tier sensors ( 104, 106 ) are activated in response to a user requesting a particular level of service or in response to an environmental condition. Alternatively, only those sensors are turned on which are compatible with a user's biometric profile.
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