Conditional Access System (CAS) is a system by which electronic transmission of digital media (especially satellite television signals through cable) is limited only to subscribed clients. The signal is encrypted and is unavailabe for unauthorised reception. A set-top box is required in the customer premises to receive and decrypt the signal. Artists impression of a Boeing 601 satellite, as configured for digital television transmission by SES Astra Satellite television is television delivered by way of communications satellites, as compared to conventional terrestrial television and cable television. ... The term set-top box describes a device that connects to a television and some external source of signal, and turns the signal into content then displayed on the screen. ...
The CA system interfaces with a network's database of customers in order to verify that a viewer is authorised to access content.
CA systems include a module within the set-top box that proves the viewer is entitled to see the content.
Now, with customers wanting to buy their own set-top boxes, conditionalaccess companies and set-top box manufacturers are having to place the security module within the smart card or another removable device, rather than in the box, making the CA system 'hardware-agnostic'.
20 CFR 654.403 - Conditionalaccess to the intrastate or interstate clearance system.
Upon receipt of a request for conditionalaccess pursuant to paragraph (a)(2) or paragraph (b)(1) of this section, the RA shall review the matter and, as appropriate, shall either grant or deny the request.
The authorization for conditionalaccess to the intrastate or interstate clearance system shall be in writing, and shall state that although the housing does not comply with the applicable standards, the employer's job order may be placed into intrastate or interstate clearance until a specified date.
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