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 payTV networks, such as those involving cable TV (DVB-C), satellite (DVBS), 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 implementation of WiFi networks was in fact without adequate wireless security and any security that was needed had to be built in at higher levels of protocol architecture.