A restricted reception device enabling a subscriber receiver to
selectively receive broadcasting data transferred via a digital cable
broadcasting network, includes: a demultiplexer for receiving
broadcasting data and an ECM including a CW from the subscriber receiver,
and demultiplexing them, the broadcasting data and the ECM being
transferred through an in-band channel; an out-of-band channel signal
processor for receiving an EMM from the subscriber receiver, and
processing the EMM, the EMM being transferred through an out-of-band
channel; a restricted reception processor for descrambling the scrambled
broadcasting data using the ECM and the EMM received from the out-of-band
channel signal processor; and a remultiplexer for multiplexing the
descrambled broadcasting data received from the restricted reception
processor, and sending the multiplexed broadcasting data to the
subscriber receiver.