Apparatus and Method for Execution Management of multiple Conditional Access Software Objects in the Downloading-based Conditional Access Systems

A receiver capable of conducting execution management of plural receiving control software objects in a downloading-based receiving limitation system and an execution management method are provided to drive a lot of receiving control software in one contents receiver, and to have a receiving limitation function for fast conversion between channels. A receiving control software manager(260) conducts overall management including downloading, execution, state control, and termination of a lot of receiving control software. A download unit(270) downloads the receiving control software from an external server according to a request of the manager. A demultiplexer(250) receives scrambled multimedia contents and a receiving control message, and delivers the message to the manager. A descrambler(210) receives a descrambling key extracted from the message by the receiving control software, and descrambles the scrambled multimedia contents.