Method and system for linking certificates to signed files

Details Method and system for linking certificates to signed files Method and system for linking certificates to signed files

G - Physics

06

F

G06F 1/00 (2006.01)

Patent

CA 2561335

A method and systems for linking the certificate to the signed file to which it is associated is disclosed. According to the method and systems of the invention, the address or URL wherein the certificate is stored is encoded in the filename of the signed file so as to be transmitted jointly with the file. When receiving such a signed file, a first step consists in extracting and decoding the certificate address from the filename. Using the certificate address, the certificate can be accessed and checked before opening and authenticating the signed file. In a preferred embodiment, the signature of a signed file is based on the file content and on a private key while the corresponding certificate comprises at least the corresponding public key.

La présente invention a trait à un procédé et des systèmes pour l'association du certificat au fichier signé auquel il est associé. Selon le procédé et les systèmes de l'invention, l'adresse ou le localisateur de ressources universel où le certificat est stocké est codé(e) dans le nom de fichier du fichier signé de manière à être transmis(e) conjointement avec le fichier. Lors de la réception d'un tel fichier signé, une première étape consiste en l'extraction et le décodage de l'adresse de certificat à partir du nom de fichier. Grâce à l'adresse de certificat, il est possible d'accéder au certificat et de le vérifier préalablement à l'ouverture et l'authentification du fichier signé. Dans un mode de réalisation préféré, la signature d'un fichier signé est basée sur le contenu du fichier et sur une clé privée alors que le certificat correspondant comporte au moins la clé publique correspondante.

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