METHOD FOR OPERATING A CONDITIONAL ACCESS SYSTEM TO BE USED IN COMPUTER NETWORKS AND A SYSTEM FOR CARRYING OUT SAID METHOD

摘要

The invention relates to a broadcasting media content in a network, in particular, to a receiving system and to a system for conditional access thereto. Said invention makes it possible to retransmit a content protected by a provider in a computer network and to preserve the subscriber control by the content provider. The inventive digital media system in a computer network comprises a set of servers which are used for adapting the provider content flows and assigning IP addresses of the computer system thereto and which are accessible via a set of network terminals (STB or personal computers) containing a content player and a content request module connected to servers, which are used for controlling a subscriber access to a local computer network, and to a validator server which provides session keys required for protecting control words of the provider content. The session keys and flow adapting servers of a controllable computer system are used for encoding control words which protect the provider content and afterwards are introduced into control right messages of a content flow and the access control of the network terminals of the subscribers to the IP addresses assigned to the adapted provider content flows are organized by control and configuration means of the controllable computer system. In this case it is possible to realize the flexibility according to the tariff plans not achievable with the use of the chip of cards of conditional access of extended CAS.