Unique digital signature

H - Electricity – 04 – L

Patent

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H04L 9/32 (2006.01)

Patent

CA 2340367

A method and apparatus for a unique digital signature is provided. According to one aspect of the invention, a unique digital signature (132) comprises an adapted digital signature (144) and a service id (136). The adapted digital signature (144) provides temporary or restricted privileges for a particular electronic service. According to one embodiment only a fixed number of uses of the unique digital signature (132), corresponding to an index number (112), are allowed. In one embodiment, the electronic service is electronic message forwarding. In another embodiment, the electronic service is electronic media delivery. An authentication log file is maintained for recording status information concerning unique digital signatures.

L'invention concerne un procédé et un appareil destinés à la création d'une signature numérique unique. Dans l'un des aspects de l'invention, la signature numérique unique (132) comprend une signature numérique adaptée (144) et un numéro d'identification de service (136). La signature numérique adaptée (144) donne des privilèges temporaires ou limités à un service électronique donné. Dans l'un des modes de réalisation, on n'admet qu'un nombre fixe d'utilisateurs de la signature numérique unique (132), qui correspond à un indice (112). Dans un mode de réalisation, le service électronique consiste en la réexpédition de messages électroniques. Dans un autre mode de réalisation, le service électronique consiste en la livraison de supports électroniques. On tient un fichier-journal d'authentification, destiné à enregistrer les informations d'état qui concernent les signatures numériques uniques.

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