Trusted license in a content protection system or the like

Details Trusted license in a content protection system or the like Trusted license in a content protection system or the like

G - Physics

06

F

G06F 17/00 (2006.01) G06F 12/14 (2006.01)

Patent

CA 2509671

A digital license includes an identification of a removal service that can authorize removing such license. A client selects the license to be removed and the service, constructs a challenge including therein a challenge license identification block (LIB) identifying the license to be removed, and sends the challenge to the service. The service receives the challenge, stores at least a portion of the challenge in a database, constructs a response corresponding to the challenge and including therein a response LIB identifying the license to be removed and an identification of the service, and sends the response to the client. The client receives the response, employs the response LIB from the response to identify the license to be removed, and removes the identified license upon confirming that the identification of the service in the identified license matches the identification of the service in the response.

L'invention concerne une licence numérique comprenant une identification de service de retrait qui peut autoriser le retrait de cette licence. Un client sélectionne la licence à retirer et le service construit une demande incluant un bloc d'identification de licence (LIB) de demande identifiant la licence à retirer et envoie la demande audit service. Ce service reçoit la demande, stocke au moins une partie de cette demande dans une base de données, construit une réponse correspondant à la demande et inclut une réponse LIB identifiant la licence à retirer et une identification du service, et envoie la réponse au client. Ce client reçoit la réponse, utilise la réponse LIB pour identifier la licence à retirer, et retire la licence identifiée lors de la confirmation de la correspondance entre l'identification du service dans la licence identifiée et l'identification du service dans la réponse.

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