×

Mechanism and apparatus for encapsulation of entitlement authorization in conditional access system

  • US 20050152551A1
  • Filed: 03/25/2005
  • Published: 07/14/2005
  • Est. Priority Date: 08/01/1997
  • Status: Active Grant
First Claim
Patent Images

1. In a terminal of a conditional access system in which a user selects a service, the selected service being associated with a frequency, the terminal having a tuner and a secure element with at least one authorized entitlement unit number stored therein, a method of determining whether the terminal is authorized to receive the selected service, the method comprising steps of:

  • receiving at least one encrypted entitlement control message corresponding to the service, wherein each entitlement control message includes a packet identifier (PID) and a payload;

    decrypting each of the at least one encrypted entitlement control message in the secure element, each decrypted entitlement control message revealing at least one first entitlement number associated with the selected service, wherein the at least one authorized entitlement unit number is carried in the payload; and

    determining that the terminal is authorized to receive the selected service when any first entitlement number of any decrypted entitlement control message represents any number of the at least one authorized entitlement unit number.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×