Biometric identification method and device adapted to verification on chip cards
AssigneeGemplus
InventorsDavid Naccache, Claude Barral, Jean-Sebastien Coron, Cédric Cardonnel
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Abstract
A method and associated device for checking a biometric signature by a simple and secure calculation adapted to personal objects of the chip card type. The method is based on the storage within the object of an obscured biometric signature and an associated authentication code. A terminal capturing a fingerprint compares the fingerprint data with the obscured biometric signature transmitted by the card and transfers the result of this comparison to the chip card, which validates this result with the authentication code.
Claims17
An enrolment method comprising the steps of:
- capturing biometric data;
- extracting a true biometric signature composed of true particular biometric data from the captured biometric data;
- producing false particular biometric data;
- generating an obscured biometric signature by combining the false particular biometric data with the true particular biometric data;
- and
- producing an authentication code which indicates which data are the false and true particular biometric data of the obscured biometric signature.
A biometric identity check method comprising the steps of:
- capturing biometric data;
- extracting a true biometric signature composed of true particular biometric data from the captured biometric data;
- comparing the true biometric signature with an obscured biometric signature composed of true particular biometric data and false particular biometric data;
- producing a code indicating which data of the obscured biometric signature are the true and false biometric data on the basis of the comparison with the true biometric signature;
- and
- comparing said produced code with an authentication code indicating which data are the true and false particular biometric data of the obscured biometric signature.
An enrolment device, comprising:
- biometric signature extraction means for obtaining a true biometric signature composed of true particular biometric data from captured biometric data;
- and
- obscuring means for producing false particular biometric data, combining said false particular biometric data with said true particular biometric data to obtain an obscured biometric signature, and producing an authentication code for indicating which data are the true and false particular biometric data of the obscured biometric signature.
A personal object comprising:
- a secure memory that contains an obscured biometric signature composed of true particular biometric data and false particular biometric data and an authentication code that indicates which data are the true and false particular biometric data of the obscured biometric signature;
- communication means to transfer the obscured biometric signature to a service terminal;
- and
- a means for comparing a code, produced by the service terminal and transferred by the communication means to the personal object, with the authentication code, wherein the produced code indicates which data are the true and false particular biometric data of the obscured biometric signature on the basis of a true biometric signature obtained by the service terminal.
A service terminal comprising:
- extraction means for obtaining a true biometric signature composed of true particular biometric data from captured biometric data;
- and
- means for producing a code from a comparison between the true biometric signature and an obscured biometric signature composed of true particular biometric data and false particular biometric data, said produced code indicating which data are the true and false biometric data of the obscured biometric signature on the basis of the true biometric signature obtained by the service terminal.
Dependencies are inferred from the claim text.