Content usage-right management system and management method

Details Content usage-right management system and management method Content usage-right management system and management method

2002-08-15

2009-02-24

Barron, Jr., Gilberto (Department: 2432)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C726S031000

Reexamination Certificate

active

07496756

ABSTRACT:
A system in which content usage conditions can be upgraded without the need for a service provider to control content-usage rights of a user. In the system in which encrypted content is distributed and is allowed to be utilized only by authorized users, the service provider receives a content usage-right certificate from the user, and on the condition that it is determined that data is not tampered with by verifying a digital signature of an issuing entity of the content usage-right certificate, the service provider obtains user information and content purchase information of the user from the content usage-right certificate, and performs upgrade processing by, for example, changing the usage conditions. It is thus possible to change the content usage conditions without the need for the service provider to possess usage control data.

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