17
CONTENT SECURITY FOR MOBILE TV
Good work must, in the long run, receive good rewards or it will cease to be good work.
—Charles Handy, Irish thinker and author
17.1 INTRODUCTION: PAY TV CONTENT SECURITY
Satellite and cable broadcast services have had a long history of providing pay-TV services. Pay TV is provided through encryption of signal at the “headend” (cable or satellite) and use of a decoder with decryption at the receiving end. A number of encryption systems are in use in broadcast systems worldwide. These include, among others, Viaccess, Nagra, Conax, Videoguard, Cryptoworks, Irdeto, and NDS. The encryption systems are proprietary but are applied as per the DVB standards that are widely used in the broadcast TV industry.
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