Controlling access to content based on certificates and access predicates
US6820063B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1999 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Aug 22, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2101
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.