Good network monitoring, clever firewalls, that kind of thing. "Cyberweapon" is a bandwagon, of course, but there are devices and services that you can buy that

Good network monitoring, clever firewalls, that kind of thing. "Cyberweapon" is a bandwagon, of course, but there are devices and services that you can buy that do tend to make networks more secure, and having more of those is not a bad thing. My employer sells a device that permits one-way connections only: http://www.fox-it.com/en/products/datadiode/ http://www.fox-it.com/en/products/datadiode/. The "one-way" part is trivial, of course - the clever part is in making standard protocols work over such a link.