Encryption Devices for Use in a Conditional Access System

Abstract

A cable television system provides conditional access to services. The cable television system includes a headend from which service 'instances', or programs, are broadcast and a plurality of set top units for receiving the instances and selectively decrypting the instances for display to system subscribers. The service instances are encrypted using public and/or private keys provided by service providers or central authorization agents. Keys used by the set tops for selective decryption may also be public or private in nature, and such keys may be reassigned at different times to provide a cable television system in which piracy concerns are minimized.

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Document Details

Document Type
Technical Report
Publication Date
Jul 23, 2002
Accession Number
ADA409103

Entities

People

  • Howard G. Pinder
  • Michael S. Palgon

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Artificial Satellites
  • Asymetric Encryption
  • Authentication
  • Cable Television
  • Coding
  • Computer Programs
  • Coordinate Systems
  • Cryptography
  • Databases
  • Digital Information
  • Modulators
  • Network Protocols
  • Patent Applications
  • Random Number Generators
  • Reliability
  • Television Systems
  • Transport Protocols

Fields of Study

  • Computer science

Readers

  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Cybersecurity.
  • Electrical Engineering