Public communication system comprising distributed stations, and station and sub-station for use in such a communication system

摘要: A public communication system for encrypted audio/video information has various selective entitlement organizations with respect to its distributed receiver station. Such station comprises one or more sub-stations decrypting the received by means of a key. Furthermore, decription key that may be interrogated and thereupon verify conditional access requirement, in case positive verification, forward decryption interogating sub-­station. All said are interconnected serial standard bus, so configuration is flexibile even altered dynamically.