[Vinnie]

This fantasy scenario assumes Iraq has no knowledge of Faraday shields and optical coupling of systems

I remember a discussion last year concerning the Chicoms installing a fiber optic system for the Iraqis. I mentioned that it was probably to counter EMP.
Consensus ( which I didn't buy) was that the electronics that interfaced w/ the fiber would fry.

I have thought about constructing a farady cage for a few items. Last night I was thinking of something to use in an emergency. I came up with the idea that an unplugged microwave oven might do the trick. What you think?

[Myrddin]

I was involved in a DARPA project to make an electric vehicle. The motor controllers were coordinated with Ethernet. We had to place the electronics in a Faraday shield and connect the Ethernet via fiber optics. Why? The vehicle was a platform for a railgun with a monster pulse forming network.

If you build the cage right, it will do the job. The microwave cavity might not get the job done unless you pull the magnetron and cover the hole with a fine mesh. The doors are usually sealed with a conductive gasket. There may be other leakage paths around the "stirring" motor and fans.