On Thursdays the USPTO publishes new patent applications. Both of today's Spotlight Applications concern aspects of DRM. Assigned to Apple, the first application discloses techniques for protecting audio and video on media playback devices. Assigned to NEC, the second application discloses protecting digital content on mobile devices.
A Digital Rights Management (DRM) system for distribution of digital content such as audio or video uses a method to enhance security of the content from unauthorized access and use, including access by unauthorized players. The method does not necessarily require a token exchange and thereby minimizes storage demands on the server which distributes the digital content. The system generates and distributes keys for decryption of the digital content whereby the keys are unique to a specific player and user account.
20090282490, "System, mobile information terminal, external device, method and program for executing content," assigned to NEC (JP).
A system that executes content like music and moving pictures, and protects rights like copyright, working on a configuration of a mobile information terminal and an external device is provided. A mobile information terminal acquires a right (ticket) to execute content. An external device of higher performance, compared with a mobile information terminal, executes content after receiving the ticket from a mobile information terminal. Though content and ticket can move freely in a system, once the content is executed, an identifier for identifying the mobile information terminal that demanded the execution of content is liked with the ticket. It is this mobile information terminal that can use the same ticket again.