APPARATUS FOR AUTHENTICATING A PERSON OF AT LEAST ONE BIOMETRIC PARAMETER
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Abstract
The apparatus for authenticating a person on the basis of at least one biometric parameter, particularly on the basis of a fingerprint, comprises a biometric detector (20) for detecting a biometric parameter, a skin detector (24) for identifying, in a contactless manner, living human skin within a scanning area. The skin detector (24) is provided with at least one group encompassing at least one radiation unit (26,28) and at least one reception unit (30). The at least one radiation unit (26,28) emits radiation in the direction of the scanning area at least at two different wavelengths ranging from 400 nm to 1500 nm, at least one of the wavelengths (26,28) ranging from 900 nm to 1500 nm, while the at least one reception unit (30) receives radiation reflected from the scanning area. The apparatus further comprises a signal evaluation unit (22) that is connected to the biometric detector (20) and the skin detector (24) and is used for evaluating the intensity of the reflected radiations of the radiation unit (26,28) which are received by the reception unit (30). Based on the intensities of the reflected radiations of the radiation unit (26,28) which are received by the reception unit (30) at the two different wavelengths, the signal evaluation unit (22) can determine whether the skin detector identifies living human skin. Detecting living human skin is a prerequisite for outputting an authentication signal.
23 Citations
31 Claims
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1-12. -12. (canceled)
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13. An apparatus for authenticating a person on the basis of at least one biometric parameter, particularly on the basis of a fingerprint, comprising
a biometry detector for detection of a biometric parameter, and a signal evaluation unit connected to the biometry detector, for evaluation of the intensity of the reflected radiations of the radiation unit as received by the reception unit, wherein a skin detector is provided for contactless detection of living human skin within a scanning area, said skin detector is connected to the signal evaluation unit and comprises at least one array of at least one radiation unit and at least one reception unit, said at least one radiation unit emits radiation of at least two different wavelengths in a wavelength range between 900 and 1500 nm in the direction toward the scanning area, and said at least one reception unit receives radiation reflected from the scanning area, on the basis of the quotients or the difference of said intensities of the reflected radiations of the radiation unit as received by the reception unit at the two different wavelengths, it is determinable in said signal evaluation unit whether said skin detector is detecting living human skin, and the detection of living human skin is a precondition for the outputting of authentication signal.
Specification