Access to and delivery of licensed content is controlled using content names that were determined based on the content. A name for a data item is obtained, the name having been determined based at least in part on the data which comprise the contents of the data item. Access to the data item is authorized...http://www.google.com/patents/US20080066191?utm_source=gb-gplus-sharePatent US20080066191 - Controlling access to data in a data processing system
