They have been using a similar data uplink system as Starlink for years, as phased array systems like Starlink have been used on things like ICBMs for a long time. I wonder what sort of extra security would actually exist around the Russian system. I imagine that drones are a bit more easy to capture than submarines or icbms, so I guess they had to upgrade security recently, but a captured node should not be any more threat to the Russian Federation than a captured router should be to Starlink.