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Encyclopedia > VideoGuard

VideoGuard (sometimes referred to simply as NDS), produced by NDS, is a digital encryption system for use with conditional access television broadcasting. It is used almost exclusively on digital satellite television (DVB-S) systems operated by News Corporation, which owns the majority of NDS. Its two most widely used implementations are DirecTV in the United States and BSkyB's Sky Digital (popular in Britain and Ireland), the latter of which adopted the system in 1998. Several other broadcasters around the world use the VideoGuard system, including Yes (Israel), Viasat (Scandinavia), Sky Italia, Sky Network Television (New Zealand), Foxtel (Australia), Tata Sky (India), D Smart (Turkey), TotalTV (Serbia), ONO (Spain), Canadian Broadcasting Corporation (Canada) and Telewizja Polska S.A. (Poland). NDS Group plc is a DRM and conditional access firm. ... Encrypt redirects here. ... Conditional access (CA) is the protection of content by requiring certain criteria to be met before granting access to the content. ... Satellite television is television delivered by way of communications satellites, as compared to conventional terrestrial television and cable television. ... Official DVB logo, found on compliant devices DVB, short for Digital Video Broadcasting, is a suite of internationally accepted open standards for digital television. ... 1211 Avenue of the Americas (Sixth Avenue), where News Corporation is based News Corporation (abbreviated to News Corp) (NYSE: NWS, NYSE: NWSa, ASX: , LSE: NCRA) is an American media conglomerate company and one of the worlds largest. ... A standard DirecTV satellite dish with 1 LNB on a roof DirecTV (trademarked as DIRECTV) is a direct broadcast satellite (DBS) service based in El Segundo, California, USA, that transmits digital satellite television and audio to households in the United States, the Caribbean and Latin America except for Mexico. ... British Sky Broadcasting (BSkyB - formerly two companies, Sky Television and British Satellite Broadcasting, which merged) is a company that operates the most popular subscription television service in the Ireland. ... Sky Digital is the brand name for British Sky Broadcastings digital satellite television service, transmitted from SES Astra satellites located at 28. ... Year 1998 (MCMXCVIII) was a common year starting on Thursday (link will display full 1998 Gregorian calendar). ... Yes TV (formally incorporated as D.B.S. Satellite Services (1998) Ltd) founded in 1998, is the sole satellite television provider (DBS) in Israel. ... Viasat is a DBS distributor and TV broadcaster, owned by the Swedish media conglomerate Modern Times Group. ... SKY Italia is an Italian digital satellite television platform owned by News Corporation. ... SKY Network Television Limited (ASX: ; NZX: SKT), often trading as SKY, is a New Zealand pay television service. ... Foxtel is a subscription television company in Australia, formed through a joint venture between Telstra and News Corporation. ... Tata Sky is a DTH satellite television provider in India. ... This article or section does not cite any references or sources. ... ONO is a cable company that operates in Spain offering Triple Play services (telephone, Internet and television). ... Radio-Canada redirects here. ...


Since the majority of content provided by companies like BSkyB requires subscription, VideoGuard protects that content by encrypting both standard subscription channels and pay-per-view movies and events. Access flags can be downloaded to the subscriber's card either over the air (via 'hidden' channels) or by using the box's built in modem, thereby allowing rapid changing of channel packages and ordering of events. Pay-per-view is the name given to a system by which television viewers can call and order events to be seen on TV and pay for the private telecast of that event to their homes later. ... 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. ... For other uses, see Modem (disambiguation). ...


The VideoGuard system was introduced by News Corporation to replace the analogue VideoCrypt system. To date, the current encryption method has remained secure, although various pay per view flaws have been identified. Even these flaws are related merely to the circuitry of the Set-Top Box (STB), rather than the NDS card. It is suspected that the version initially used by Sky Digital was either insecure or close to being broken, as a software update rolled out to all boxes required replacement of the BSkyB subscriber's viewing card. VideoCrypt is a cryptographic, smartcard-based conditional access television encryption system that scrambles analogue pay-TV signals. ...


Despite being designed to protect pay-TV, VideoGuard is used by BSkyB to encrypt Channel 4, and Five (To prevent these channels being viewed outside the UK for copyright reasons). These channels are free-to-air in the UK, either using analogue PAL or digital terrestrial (DVB-T) receivers, and can also be viewed using any working VideoGuard card from the correct area, even if expired. Until November 2005, all of ITV's channels were also encrypted using VideoGuard, but switched to becoming unencrypted like the BBC's channels. All these channels can also be viewed using the Freesat from Sky product which, due to the availability of inexpensive cards, potentially increases the risk of VideoGuard becoming cracked through experimentation. This article is about the British television station. ... Five (often referred as five, as per the logo), formerly, and more commonly known as Channel 5, is the British fifth and final national analogue terrestrial TV channel. ... Free-to-air is a phrase used to describe television and radio broadcasts which are available without subscription and without decryption (pay-TV). ... Official DVB logo, found on compliant devices DVB, short for Digital Video Broadcasting, is a suite of internationally accepted open standards for digital television. ... Independent Television (generally known as ITV, but also as ITV Network) is a public service network of British commercial television broadcasters, set up under the Independent Television Authority (ITA) to provide competition to the BBC. ITV is the oldest commercial television network in the UK. Since 1990 and the Broadcasting... For other uses, see BBC (disambiguation). ... BSkyB Logo Freesat from Sky is a British non subscription based satellite service from BSkyB which gives viewers access to 150 channels. ...


To greatly improve security of the Videoguard encryption, News Corporation's encrypted output can be viewed only using a designated STB in which VideoGuard is embedded into the circuitry. Due to News Corporation's control of VideoGuard, it is impossible to get a licensed VideoGuard Conditional Access Module (CAM) for a third-party STB, or to obtain VideoGuard routines for a software CAM. This is seen by many as an example of vendor lock-in, often to protect NewsCorp's preferred suppliers of boxes, eg Pace Micro Technology. In contrast, CAMs and even software CAMs are available for all other encryption systems, including Irdeto, Nagravision and Viaccess. The CAM monopoly may be broken due to Italian inter-operability laws, which are forcing Sky Italia to allow other boxes to read their cards for legally acquired services. A conditional access module (CAM) is an electronic device, usually incorporating a slot for a smart card, which equips a DVB television or set-top box with the appropriate hardware facility to view conditional access content that has been encrypted using a conditional access system. ... In economics, vendor lock-in, also known as proprietary lock-in, customer lock-in, lock-in is where a customer is dependent on a vendor for products and services and cannot move to another vendor without substantial switching costs, real and/or perceived. ... Pace Micro Technology Plc is a British manufacturer of set top boxes for digital and analogue satellite television, founded in 1982. ... Irdeto Access is a provider of content protection technologies for digital video and IP networks. ... Nagravision is a company of the Kudelski Group that develops conditional access systems for cable and satellite television. ... Viaccess is an encrypting system for digital television developed by France Télécom. ... Inter-operability (computer science) (usually referred to as interoperability) is the ability of exchanging and using information, usually within large networks, such as Internet. ... SKY Italia is an Italian digital satellite television platform owned by News Corporation. ...


Several groups managed to reverse-engineer VideoGuard to the point where a legitimate subscriber's card can be read and utilised firmware to decrypt only those channels that subscriber is authorised to view. A software CAM emulator exists for the DreamBox & Triple-Dragon Linux-powered satellite receivers, along with the Diablo, Dragon and T-Rex Conditional Access modules. However, many broadcasters choose to pair their cards to a specific STB serial number, meaning that a paired (also called "married") card can be used only in a broadcaster-supplied STB, or by using the serial number from said receiver with one of the reverse-engineered solutions. In case of Sky Digital, cards with a subscription are paired. Cards that decrypt only FTV channels (Channel 4, Five) are not necessarily paired. None of the reverse-engineered solutions are able to "update" the card, meaning the legitimate card needs to be in an official Sky receiver for a few minutes to get the update when the last update has expired. Every update lasts only a few weeks. A microcontroller, like this PIC18F8720 is controlled by firmware stored inside on FLASH memory In computing, firmware is a computer program that is embedded in a hardware device, for example a microcontroller. ... For other uses, see Dreambox (disambiguation). ... This article is about operating systems that use the Linux kernel. ...


VideoGuard Users

British Sky Broadcasting (BSkyB - formerly two companies, Sky Television and British Satellite Broadcasting, which merged) is a company that operates the most popular subscription television service in the Ireland. ... A standard DirecTV satellite dish with 1 LNB on a roof DirecTV (trademarked as DIRECTV) is a direct broadcast satellite (DBS) service based in El Segundo, California, USA, that transmits digital satellite television and audio to households in the United States, the Caribbean and Latin America except for Mexico. ... Foxtel is a subscription television company in Australia, formed through a joint venture between Telstra and News Corporation. ... SKY Italia is an Italian digital satellite television platform owned by News Corporation. ... Yes TV (formally incorporated as D.B.S. Satellite Services (1998) Ltd) founded in 1998, is the sole satellite television provider (DBS) in Israel. ... Look up hot, HOT in Wiktionary, the free dictionary. ... Viasat is a DBS distributor and TV broadcaster, owned by the Swedish media conglomerate Modern Times Group. ... Tata Sky is a DTH satellite television provider in India. ... SKY Network Television Limited (ASX: ; NZX: SKT), often trading as SKY, is a New Zealand pay television service. ... ONO is a cable company that operates in Spain offering Triple Play services (telephone, Internet and television). ... This article or section does not cite any references or sources. ... Radio-Canada redirects here. ...

External links

Link to NDS website with more technical and business information on VideoGuard [1]


  Results from FactBites:
 
VideoGuard (1033 words)
Aangezien dat ook de basis is van de Videoguard IP Videosystemen, is het mogelijk om een bepaalde vorm van samenwerking, integratie, te verkrijgen tussen deze, voorheen gescheiden, werelden.
Daarmee is het mogelijk om personeel visueel toegang te geven tot patiƫnten op de zalen; dit kan van pas komen bij lagere bezetting tijdens de nacht, analyse van specifieke ziekte beelden zoals bv een slaapstoornis.
De Videoguard systemen bieden gebruikers de mogelijkheid om overal en altijd de beelden te bekijken, op te nemen en opgenomen beelden eenvoudig terug te zoeken en te beheren.
RISC OS Documentation - VideoGuard (799 words)
When a device is removed, or started, the VideoGuard module will restart its checks for the current display being valid.
This will trap the majority of cases where the system is idle waiting for user input and no driver is present whilst allowing activity to take place (such as may occur during the boot sequence) where the system is expecting a driver to be loaded.
Once the VideoGuard module has detected a case where the system is waiting for input in this way it will attempt to force the display to the native driver.
  More results at FactBites »

 
 

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