In that case, airgap and strict media discipline (once media touches the secure network, it's never used on insecure networks again) should do, no? But my poin

In that case, airgap and strict media discipline (once media touches the secure network, it's never used on insecure networks again) should do, no? But my point is that most us aren't foreign states trying to make nuclear reactors against the wishes of a superpower. We're more worried about things like common theft and border seizures.