From memory (and @WAtvVideos may be able to add to this) up to “Digital” the satellite service was still running on Galaxy’s Irdeto setup - in the lead-up, new smartcards were issued to both Foxtel and Austar customers
Austar stayed with Irdeto and Foxtel moved to NDS - Austar had to roll out new cards a few times (and end up linking the card to the device) to try and beat piracy (ironically, a lot of the Irdeto hacking had been done by people connected with NDS)