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
Optical multiplexer/demultiplexer
Catalytic pyrolysis using UZM-44 aluminosilicate zeolite
Flexible quantization
Printing device, printing system, program, and printing method for printing based on print data from a user authorized to issue a print instruction for the print data
Method for building taxonomy of topics and categorizing videos
Waterproof wound protector
Methods and kits for predicting the responsiveness of hepatocellular carcinoma patients to 5-fluorouracil-based combination chemotherapy
  Randomly Featured Patents
Microcomputer capable of outputting pulses
2-(O-Tolyl)imino-1,3-dithioles, a method for preparing the same, and their utilization as ixodicides
Electromigration injection from a microreservoir-electrode in capillary separation systems
Adjustable pitch tool bar assembly for track presses
Trash can receptacle
Image processing method and image processing apparatus utilizing luminance histograms, and projector
Roll welding machine and method of reconditioning caster rolls
Dual channel communications system particularly adapted for the AM broadcast band
Image forming method and image forming apparatus
Catalyst system, process for its preparation and its application to the manufacture of aldehydes