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
Upstream channel bonding in a cable communications system
Current collector for lead acid battery
Transmitter having a programmable amplifier operating class
Mobile terminal and method for displaying information
Process for production of nickel oxide-stabilized zirconia composite oxide
Removable storage device and method for identifying drive letter of the removable storage device
Cross-platform cloud-based map creation
  Randomly Featured Patents
Floating valve for drain tile inlet
Process for the preparation of trans-1,1,2-triphenyl-but-1-ene derivatives
Transporter for lead frames and transport assembly
Belt having embedded wires interlaced across lengthwise surfaces of shafts
Cutting area
Powder metal mixture including micronized cellulose fibers
Body monitoring apparatus
Symbol timing acquisition using early-late interpolation
Flash memory cell
Housing for electronic components