The French are known for doing that. I'm sure most militaries do in some way http://spectrum.ieee.org/semiconductors/design/the-hunt-for-the-kill-switch http:/

The French are known for doing that. I'm sure most militaries do in some way http://spectrum.ieee.org/semiconductors/design/the-hunt-for-the-kill-switch http://spectrum.ieee.org/semiconductors/design/the-hunt-for-...