Conditional access system for a plurality of spaces

摘要

Conditional access system for a plurality of spaces, comprising a conditional access module, comprising a master - the chip card reader and a slave - chip card reader, said decryption means and an application for a plurality of spaces, which reliably in the interior of the module is stored, wherein said decoding means for decoding a data stream required control words from a conditional access application in the module are provided, subject to the presence of a valid slave - chip card in the slave - chip card reader and subject to an activation by the application for a plurality of spaces, and wherein the application for a plurality of spaces the decryption means only when a valid master - chip card in the master - the chip card reader is activated.