Method for coding biometric data, method for controlling identity and devices for carrying out said methods
AssigneeMorpho
InventorHervé Chabanne
Life of this patent
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Abstract
The invention relates to a coding method consisting of the following steps: biometric data associated with an individual is obtained; a word, relating to an error correction code, selected in order to correct a quantity of errors in a relation to a statistical quantity of errors between two biometric measurements relating to the same individual, is generated, said word dissimulating information relating to said individual with the aid of a private function; and a combination is created between the biometric data thus obtained and the word thus generated.
Claims32
A method of coding biometric data associated with respective individuals, comprising the following steps:
- obtaining biometric data associated with an individual;
- generating a word relating to an error correcting code chosen so as to correct a quantity of errors in conjunction with a statistical quantity of errors between two biometric measurements relating to one and the same individual, the word concealing, with the aid of a private function, an item relating to said individual;
- performing a combination between the biometric data obtained and the word generated.
A method of checking identity on the basis of previously stored biometric data, the biometric data being associated with respective individuals and each being coded with a respective word relating to an error correcting code, each word concealing, with the aid of a private function, an item relating to the individual associated with the corresponding biometric data, the error correcting code being chosen so as to correct a quantity of errors in conjunction with a statistical quantity of errors between two biometric measurements relating to one and the same individual, the method comprising the following steps:
- performing a biometric measurement relating to an individual;
- performing a combination between said biometric measurement and certain at least of the stored coded biometric data;
- and
- decoding the result of said combination on the basis of said private function, so as to retrieve the item concealed in the word with which the biometric data associated with said individual have been previously coded.
A coding device for coding biometric data associated with respective individuals, the coding device comprising:
- means for obtaining biometric data associated with an individual;
- means for generating a word relating to an error correcting code chosen so as to correct a quantity of errors in conjunction with a statistical quantity of errors between two biometric measurements relating to one and the same individual, the word concealing, with the aid of a private function, an item relating to said individual;
- means for performing a combination between the biometric data obtained and the word generated.
A checking device for checking identity on the basis of previously stored biometric data, the biometric data being associated with respective individuals and each being coded with a respective word relating to an error correcting code, each word concealing, with the aid of a private function, an item relating to the individual associated with the corresponding biometric data, the error correcting code being chosen so as to correct a quantity of errors in conjunction with a statistical quantity of errors between two biometric measurements relating to one and the same individual, the checking device comprising:
- means for performing a biometric measurement relating to an individual;
- means for performing a combination between said biometric measurement and certain at least of the stored coded biometric data;
- and
- means for decoding the result of said combination on the basis of said private function, so as to retrieve the item concealed in the word with which the biometric data associated with said individual have been previously coded.
Dependencies are inferred from the claim text.