There is no safety in numbers, or in anything else.

—James Thurber

The security of content transmitted over different transmission media has always been a key consideration in pay-TV services. Traditional pay-TV networks, such as those involving cable TV (DVB-C), satellite (DVB-S), or terrestrial transmission (DVB-T) have been using conditional access systems such as NDS, Conax, Irdeto, Viaccess, etc. to secure content from the point of transmission until it is received at the set-top box of the customer. Wireless environments present an additional challenge in securing content as the transmissions are prone for “sniffing” or multiple types of security attacks common in the internet environment. The initial ...

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