Access Control System – (Sometimes known as Conditional Access System) – A security system assuring that only those who have paid for the services, will get those services. The system is often made up of 3 parts: (1) signal scrambling, (2) encryption of electronic "keys" which the viewer will need, and (3) the Subscriber Management System.

Access Control

Conditional Access, definition of, links and related articles

Conditional Access Table (CAT)

Downloadable Conditional Access System (DCAS™)

Entitlement Control Messages - (ECMs)

Interactive TV Conditional Access Software Businesses

iTV Content Management Solutions (CMS) and Operations Support Systems (OSS) Providers

List of Interactive TV Data Management Businesses

List of Subscriber Management Systems (SMS) Businesses

The Video on Demand Dictionary and Business Index