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Controlling access to content based on certificates and access predicates

  • US 20050060549A1
  • Filed: 10/25/2004
  • Published: 03/17/2005
  • Est. Priority Date: 10/26/1998
  • Status: Abandoned Application
First Claim
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1. A system for enforcing digital rights on content downloaded from a provider comprising:

  • means for downloading the content from the provider encrypted for a particular combination of an operating system and a central processing unit (CPU) of the computer;

    means for downloading an access predicate, for the content, that specifies properties an application running on a computer is to have in order to process the content;

    means for checking the access predicate against a rights manager certificate for the application requesting access to the content;

    means for checking the access predicate against a certificate for the operating system running on the computer;

    means for permitting access to the content only if both the rights manager certificate and the certificate for the operating system satisfy the access predicate wherein accessing the content comprises decrypting the content.

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