My thinking is that would be a given, but the communication would be, for all practical purposes, undetectable, putting the state at a huge disadvantage.
And unless there is a way to make the tech very easily available to anyone, you can't just create entangled objects.
Every government has powerful enemies that would supply those willing to pay or subvert.
And your're right, it will take a genius to explain this.
I think it would take another species to explain this.
But then again I’m a huge fan of Ender’s Game.