Method and device for the generation of checkable...

H - Electricity – 04 – L

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H04L 9/32 (2006.01) G07B 17/00 (2006.01)

Patent

CA 2479144

The invention relates to a method and a device for the generation of checkable forgery-proof documents with an externally supplied cryptographic module, whereby the checking of authenticity of the document is carried out without using key information belonging to the cryptographic module. According to the invention, the method and the device are characterised in that the cryptographic module is supplied with two types of data, even on supply from a communication partner which is cryptographically not trustworthy, which either remain in the cryptographic module or are attached to the document. The information remaining in the cryptographic module is used to secure the document information by means of a check value and the information transferred into the document serves to verify the securing of the document by the cryptographic module during a check of the authenticity of the document at a checkpoint.

L'invention concerne un procédé et un dispositif permettant de créer des documents électroniques infalsifiables et vérifiables comportant un module cryptographique d'alimentation externe. La vérification des documents infalsifiables est effectuée sans l'aide d'informations codées propres au module cryptografique. Selon l'invention, le procédé et le dispositif sont caractérisés en ce que le module cryptografique est, même en cas d'alimentation par un partenaire de communication non fiable en termes de cryptographie, alimenté par deux types de données qui, d'une part, demeurent dans le module cryptografique et qui, d'autre part, restent attachés au document. Les informations restant dans le module cryptografique sont utilisées pour protéger les informations du document par une valeur de vérification. Les informations intégrées au document permettent de vérifier la protection du document par le module cryptografique dans le cadre d'une vérification du caractère infalsifiable du document dans un emplacement de vérification.

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