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See also free-to-view and pay television. Hidden categories: Webarchive template wayback links All articles with dead external links Articles with dead external links from September Articles with permanently dead external links Articles with dead external links from July Articles with dead external links from November Namespaces Article Talk. This allows broadcasters to use modules containing solutions from different suppliers, thus increasing their choice of anti-piracy options. This can be done by opening a session to host's Low-Speed Communication LSC resource assuming that the host announced the availability of this resource. However these extensions have often not proved popular with manufacturers. For example, the host could contain a modem for communication over a telephone line allowing the CAM to implement pay-per-view. The CAM often contains a smart-card reader. Contribute Help Community portal Recent changes Upload file. This module, in turn, then accepts the pay-to-view subscriber card, which contains the access keys and permissions. From Wikipedia, the free encyclopedia. Views Read Edit View history.

Pay TV stations want to choose which encryption method to use. Even if the Common Interface has been created to resolve cryptography issues, it can have other functions using other types of modules such as Web BrowseriDTV Interactive Televisionand so forth.

The Command Interface is extensible and there are several specification documents available which describe these extensions e.

All Common Interface equipment must comply with the EN standard. Each one uses their own algorithms and there is no defined standard for them. The link and physical layers are defined in this specification and the higher layers are defined in the MPEG-2 specifications. Those algorithms are proprietary to individual suppliers.

A first draft of the specification was put up for review in January as V1. To use this service, pcmcia card slot lg tv pret shall open a session to the "Date-Time" resource provided by host. The Common Interface allows TV manufacturers to support many different pay TV stations, by allowing to plug in exchangeable conditional-access modules CAM for various encryption schemes.

Broadcast encryption and digital rights management. Pcmcia card slot lg tv pret establishment of the Trusted Authority has been completed [2] and an official security certification lab appointed.

The applications that may be performed by a module communicating across the interface are not limited to conditional access or to those described in pcmcia card slot lg tv pret specification. Indeed, one of Digital Video Broadcasting's main strengths is the option of implementing the required conditional access capability on the Common Interface.

For example, the module can request the current date and time from the host. Or, module can ask the host to pcmcia card slot lg tv pret a message on the TV screen and can then read keypresses from the host remote control. By reducing the widths of the address and data buses it has been possible to include a bi-directional parallel transport stream interface.

Card sharing FTA Pirate decryption. Categories : Digital Video Broadcasting Digital rights management standards Conditional-access television broadcasting Set-top box.

The specification only defines two aspects, two logical interfaces to be included on the same physical interface. The second interface, the command interface, carries commands between the host receiver and the module.

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EuroCrypt Videocipher VideoCrypt. More than one module may be supported concurrently. This is a defined standard that enables the addition of a CAM in a DTV receiver to adapt it to different kinds of cryptography. In , versions 1. The 1. Archived from the original on Retrieved Archived from the original PDF on Top Up TV. The RSD also must be signed. The Common Interface allows them to communicate with each other. First two of these three are necessary for initial handshaking between CAM and its Host, while the CA Support resource is necessary for descrambling the selected channels. The specification does not define the operation or functionality of a conditional access system application on the module. The spec doesn't state explicitly about each feature if it is mandatory or optional. In , version 1. The optional feature of v1. This communication is in the form of a layered protocol stack which allows the host and module to share resources.