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
Heterogeneous language data typing without executable regeneration
Mounting structure, electro-optical apparatus, and touch panel
System and method for creating, managing and trading hedge portfolios
Internal wiring structure of semiconductor device
Optical analysis device, optical analysis method and computer program for optical analysis
Server system and method for discovering digital assets in enterprise information systems
Package for a medicinal product
  Randomly Featured Patents
Two sided crown molding
Portable communication terminal, communication method and control program
Motorcycle and automobile gas tank paint protector
Six volt battery charger or the like
Diltiazem formulation
Integrated tunable wavelength converter and variable optical delay
Balance adjusted fan
Pelargonium plant named `Fiscody`
High-cross correlation dynamic channel assignment for sectorized cells
Microparticle measuring apparatus