Abstract: The invention provides a method of automatically verifying certain items in a database relating to a set of people, and including for each person a plurality of data items such as age, firstname, gender, a portrait, fingerprint images, or other biometric data items, the method incorporating: determining for each person a plurality of correlations associating certain data items of that person with one another; for each data item being verified, calculating a confidence score depending at least on a first correlation of the data item being verified with a first other data item for the same person and on a second correlation of the data item being verified with a second other data item for the same person; and a step of comparing the score with a threshold value in order to determine whether the data item being verified is or is not valid.

Abstract: The invention relates to an authentication method for authenticating a client device having an authentication token generated by means of a pseudo-homomorphic function and based on a secret element (PIN) known only by the client device, to a server, comprising: the generation (A1), by the client device, of proof of knowledge of the secret element based on a proof generation key masked with a first mask data item, said masked proof generation key being dependent on said secret element, the transmission to the server by the client device, of said generated proof of knowledge of the secret element (A2) and of the authentication token (J) masked using the mask data item (A3), the verification of the validity of the masked authentication token (A4) and of the validity of the proof of knowledge by the server (A6) by a zero-knowledge proof, proving the knowledge of said secret element by the client device without revealing it.

Abstract: The present invention concerns a method of generating a biometric certificate of a user performed by a data processing device of a certifying authority, comprising a step of generating (E4) a certificate for said user comprising data related to the identity of the user and truncated authentication data of said user generated using a method of generating a biometric authentication datum, comprising steps of: acquiring (E1) first biometric data of said user; generating (E2) a first a proof of knowledge of said first biometric data from the first acquired biometric data and from a pseudo-random function; generating (E3) a first truncated authentication datum by applying a truncation function to said first generated proof of knowledge.

Abstract: The invention concerns a method for generating an electronic signature key and an associated public key certificate, implemented by a client unit and a server unit, the method comprising a step during which the client unit and/or the server unit generate(s) a signature key comprising a private key and a public key, and a public key certificate comprising said public key, the method being characterized in that the client unit acquires an item of biometric data of an individual, and in that the signature key and/or the public key certificate are generated from at least a portion of said biometric data, and in that the portion of biometric metric data from which the signature key and/or the public key certificate have been generated is ephemeral and is not memorized after the signature key and the public key certificate have been generated. The invention also concerns a method for transferring a message and a system designed to implement the method for generating a signature key.

Abstract: The present invention concerns a method of generating a biometric certificate of a user performed by a data processing device of a certifying authority, comprising a step of generating (E4) a certificate for said user comprising data related to the identity of the user and truncated authentication data of said user generated using a method of generating a biometric authentication datum, comprising steps of: acquiring (E1) first biometric data of said user; generating (E2) a first a proof of knowledge of said first biometric data from the first acquired biometric data and from a pseudo-random function; generating (E3) a first truncated authentication datum by applying a truncation function to said first generated proof of knowledge.

Abstract: The invention relates to an authentication method for authenticating a client device having an authentication token generated by means of a pseudo-homomorphic function and based on a secret element (PIN) known only by the client device, to a server, comprising: the generation (A1), by the client device, of proof of knowledge of the secret element based on a proof generation key masked with a first mask data item, said masked proof generation key being dependent on said secret element, the transmission to the server by the client device, of said generated proof of knowledge of the secret element (A2) and of the authentication token (J) masked using the mask data item (A3), the verification of the validity of the masked authentication token (A4) and of the validity of the proof of knowledge by the server (A6) by a zero-knowledge proof, proving the knowledge of said secret element by the client device without revealing it.

Abstract: The invention concerns a method for generating an electronic signature key and an associated public key certificate, implemented by a client unit and a server unit, the method comprising a step during which the client unit and/or the server unit generate(s) a signature key comprising a private key and a public key, and a public key certificate comprising said public key, the method being characterised in that the client unit acquires an item of biometric data of an individual, and in that the signature key and/or the public key certificate are generated from at least a portion of said biometric data, and in that the portion of biometric metric data from which the signature key and/or the public key certificate have been generated is ephemeral and is not memorised after the signature key and the public key certificate have been generated. The invention also concerns a method for transferring a message and a system designed to implement the method for generating a signature key.

Abstract: The invention provides a method of automatically verifying certain items in a database relating to a set of people, and including for each person a plurality of data items such as age, first name, gender, a portrait, fingerprint images, or other biometric data items, the method incorporating determining for each person a plurality of correlations associating certain data items of that person with one another, for each data item being verified, calculating a confidence score depending at least on a first correlation of the data item being verified with a first other data item for the same person and on a second correlation of the data item being verified with a second other data item for the same person, and a step of comparing the score with a threshold value in order to determine whether the data item being verified is or is not valid.