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Nagravision (or Nagra Kudelski or simply Nagra) is a company of the Kudelski Group that develops conditional access systems for digital cable and satellite television. The name is also used for their main products, the Nagravision encryption systems. ==Digital systems== Four versions of Nagravision are in common use for digital satellite television, known as Nagravision, Nagravision Cardmagedon, Nagravision Aladin and Nagravision Merlin. Nagravision Cardmagedon and Aladin are often confused with each other and used under the term "Nagravision 2" which technically does not exist. Nagravision Cardmagedon is, however, a complicated combination of Nagravision Aladin and Mediaguard SECA 2 encryption. Nagravision Merlin is also known as Nagravision 3. The decryption unit is either integrated into a receiver, available as a conditional-access module (CAM), or as one of many encryption schemes supported on a CAM emulator. Nagravision has been adopted all over the world as a conditional access system, with providers: * Bell TV (Canada) (Nagravision 3) * BIG TV (India) * Cabovisão (Portugal) (Being adopted gradually across the network - Nagravision 3 and SECA Mediaguard) * CanalSat (Germany-France) (Nagravision Media Access *NEW TYPE * (Updated Nagra 3 "Merlin" )) * Claro TV (Central America, Dominican Republic) (Nagravision 1 (outdated) with MPEG-4 encoding support custom added) * Claro TV (Brazil) (Nagravision 3) * Cyfrowy Polsat (Poland) (Nagravision 3) * Digi TV (Romania, Hungary, Czech Republic, Serbia, Slovakia) (Nagravision 3) * Digital+ (Spain) (Nagravision 3) * Dish Network (USA) (Transition to Nagravision 3 was completed on 6/18/09) * Dream Satellite TV (Philippines) (Nagravision 3) * First Media | Cable (Indonesia) (Nagravision 3) * HD+ (Germany) (Nagravision 3) * Look Communications (Canada) * Movistar (Before Telefonica) (Chile, Colombia, Venezuela, Perú, Bolivia, Ecuador) (Nagravision 3) * Vivo TV DTH (Bofore Telefonica) (Brazil, Nagravision 3) * Numericable (Belgium, France, Luxembourg) (Nagravision 3 "Merlin") * Sky Deutschland (Germany) (Nagravision 3) * StarHub TV (Singapore) (Nagravision 3) * Telenet (Belgium) (Belgium) (Nagravision 2) * Tivù Sat, Mediaset Premium and Pangea platform (Nagravision 3 "Tiger") * NOS Comunicacoes (Portugal) (Nagravision 3) * UPC (on satellite) (Nagravision 3) * Virgin Media (United Kingdom) (Nagravision 3 "Merlin", swapped from Nagravision 1 during 2009/10) * Top Up TV (United Kingdom) (NagraVision 3 "Merlin" swapped from SECA2 in 2008) * ER-Telecom (Russia) * RCS&RDS ( Romania). Both cable and satellite platforms. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nagravision」の詳細全文を読む スポンサード リンク
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