It operates on an analogue platform and its encrypted signals are delivered from one transmitter site to another.
Other commercial digital encryption systems are Irdeto (by Irdeto Access), Nagravision (by Kudelski), Viaccess (by France Telecom), and Wegener.
television | reality television | CBC Television | television program | Television | television network | CTV Television Network | television film | Thames Television | BBC Television | High-definition television | Royal Television Society | Canadian Radio-television and Telecommunications Commission | ABC Television | 2006 in television | Public-access television | 1954 in television | Televisión Española | cable television | British Academy of Film and Television Arts | DuMont Television Network | Television program | Japanese television drama | 2005 in television | digital television | 1991 in television | Ion Television | Global Television Network | China Central Television | 1996 in television |
Leitch was famous for developing the Viewguard system (similar in function to VideoCipher I) used by networks such as ABC, Fox, and others for encrypting their analog network feeds.