The monitoring station 2, connected to the pirate network 3, is equipped with
- a processing unit 22 ;
an Integrated Receiver/Decoder (I RD) 21
Preferably, the monitoring station 2 is further provided with a terminal user 23 able to display a descrambled
The processing unit 22 is charged for:
- formatting requests, towards the card server 1 5, for control words CW related to the received scrambled
stream on the I RD
21 (if the card server 1 5 works according to a pull system) ; or
- selecting , among received control words CWs from the pirate network 3, the right control word CW to decrypt the
stream received on the I RD 21 (if the card server 1 5 works according to a push system);
- load the obtained control word CW into the I RD 21 ; and particularly
- focus on the response time of cards which are the sources of the obtained control words CWs.
The analysis of the response times of a card aims, mainly, at recreating the response time signature of shared cards, and
consequently the card identifier which is encrypted within response
times to control word requests over the pirate network 3.
It is to be noted that the monitoring station 2 may be connected from anywhere within a communication network comprising a
card sharing access.