Controlling access to content based on certificates and access predicates
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United States of America Patent
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Nov 16, 2004
Grant Date -
N/A
app pub date -
Jan 8, 1999
filing date -
Oct 26, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
Digital rights for content downloaded to a subscriber computer from a provider are specified in an access predicate. The access predicate is compared with a rights manager certificate associated with an entity, such as an application, that wants access to the content. If the rights manager certificate satisfies the access predicate, the entity is allowed access to the content. A license that specifies limitations on the use of the content can also be associated with the content and provided to the entity. The use the entity makes of the content is monitored and terminated if the entity violates the license limitations. In one aspect of the invention, the access predicate and the license are protected from tampering through cryptographic techniques.
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