| 摘要 |
The present invention relates to a method and a system of verifying the identity of an individual by employing biometric data associated with the individual while providing privacy of said biometric data. A basic idea of the present invention is to represent a biometric data set X<SUB>FP </SUB>with a feature vector. A number of sets X<SUB>FP1</SUB>, X<SUB>FP2</SUB>, . . . X<SUB>FPm </SUB>of biometric data and hence a corresponding number of feature vectors is derived, and quantized feature vectors X<SUB>1</SUB>, X<SUB>2</SUB>, . . . , X<SUB>m </SUB>are created. Then, noise robustness of quantized feature components is tested. A set of reliable quantized feature components is formed, from which a subset of reliable quantized feature components is randomly selected. A first set W 1 of helper data is created from the subset of selected reliable quantized components. The helper data W 1 is subsequently used in a verification phase to verify the identity of the individual.
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