This is the coding algorithm as specified by DVB. The CSA was designed to make transmitted signals safe from hackers. For the provider, the real advantage is that CSA is universal to several types of CAM’s. This means that a provider who for instance broadcasts in both Seca and Viaccess, can send EMM’sand ECM’s with the transmission, but each CAM will only react to the commands which are meant for that CAM. All other commands are ignored.