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
Method and apparatus for prioritizing data transfer
Automated measurement of concentration and/or amount in a biological sample
System and method for confirming delivery of an electronic message
Method and apparatus for generating soft bit values in reduced-state equalizers
Methods and systems to accomplish variable width data input
Host route convergence based on sequence values
Method and system for dynamic digital rights bundling
  Randomly Featured Patents
Quick detachable vehicle seat cover
Projection exposure apparatus
Refractory resistors with etch stop for superconductor integrated circuits
Estimating optical transmission system penalties induced by polarization mode dispersion (PMD)
Electronic card connector
Heat pump with single exterior temperature sensor
Catheters with high-purity fluoropolymer additives
Chuck key assembly
Method of fabricating a fin field effect transistor in a semiconductor device