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Elements of CAS
A typical CA process involves following basic elements:
i.) The broadcast equipment - generates the encrypted programmes that are transmitted to the subscribers.
ii.) The set top box - filters out the transmitted signals and checks whether the customer has subscribed to view the channel. The programmes are then decrypted in real-time.
Within a Conditional Access System, the following modules are there:
- Subscriber Management System (SMS): The SMS is a sub-system of the CA system that manages the subscriber's information
- Subscriber Authorization System (SAS): The SAS is a sub-system of the CA system that ensures that subscriber's security module receives the authorization needed to view the programmes.
- Set Top Box (STB) - The STB houses the security module that gives authorization for decrypting the transmitted programmes.
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We welcome your comments at cas@quentind.com
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