Resources Contact Us Home
Rights management system for streamed multimedia content

Image Number 5 for United States Patent #7693280.

A sequence of content keys are shared between a receiver of pieces of digital content and a computing device upon which the content is to be rendered. The receiver encrypts each piece of content according to a corresponding content key in the sequence and forwards the encrypted content to the computing device and the computing device decrypts the encrypted content according to the corresponding content key. The receiver initially transmits to the computing device an initialization digital license with an initial content key (CK0) therein. Each of the receiver and the computing device derive a new content key (CKx) in the sequence from the initial content key (CK(0)) in the sequence on an as-needed basis and in a coordinated fashion. The initialization license is required only once for the sequence of content keys, and the receiver need not explicitly communicate (CKx) to the computing device for each piece of content.

  Recently Added Patents
Side portion of a circular saw blade
Light-emitting device package structure
Liposomal nanoparticles and other formulations of fenretinide for use in therapy and drug delivery
Method of fabricating display device
Organic electroluminescence device
Method for assisting in the checking of transaction records, transaction device, server, mobile terminal, and corresponding computer programs
Compositions and methods for concentrating and depleting microorganisms
  Randomly Featured Patents
Stents with temporary retaining bands
Super-resolution scanning optical system by incoherently superimposing two beams
Iterative receiver and iterative decoder
Reflective piano keyboard scanner
Syringeable enteral diet for animals in a hypermetabolic state caused by the stress of medical and surgical illness
Forms integration of an external data model not implemented through a document object model (DOM) accessible application programming interface (API)
Formable removable insulating enclosure for a container
Center stack face plate with integrated HVAC duct assembly
Water-soluble composition for sustained-release containing epo and hyaluronic acid
Pivot rod connector for moveable shutters