Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Sensor device and method for manufacture
Systems and methods for audio reminder messages
Helmet
Flash memory storage device, controller thereof, and data programming method thereof
Array substrate and a manufacturing method thereof
Authenticating a chip card interface device
Perfume bottle
  Randomly Featured Patents
Methods and apparatus for manipulating polygons in a multidimensional space
Locking unit
Magnetic fastener with fixing unit
Nutcracker
Dipole antenna for a portable communication device
Fluidized-bed equipment and pressurized fluidized-bed (combustion) combined cycle apparatus
Calibration of the transformation of spectral X-ray attenuation values in density and atomic number information
Process for producing a high purity antihemophilic factor concentrate
Body supported mirror
Hydraulic positioning drive with pressure and position feedback control