Sunder (2003-07-16 17:23Z) wrote:

Anything displayed on your screen is visible to the guy across the street with a TEMPEST detector unless you work in a Faraday cage. Failing that a hidden pinhole camera, or an RF transmitter attached to your cable -- hell these are available for hobbist use right now: x10.com has small devices that you can use to broadcast video from one room to another. Getting the same done for VGA, XVGA, etc. shouldn't be any harder.

Using IR or RF is one of the stupidest things you could possibly do. Think! IR and RF are detectable from a distance!

If you want to get picky, a clever brain could probably figure out keystrokes from across the street with a laser mic if the target has a loud keyboard, considering each key will probably make a slightly different sound. I'd think an attacker could determine spacebar hits, at least, and pauses, which alone might lead to a complete keystroke log. [demime 0.97c removed an attachment of type application/pgp-signature]