On: Ethernet over barbed wire

[consp]

It's possible to collect it from status leds for instance: http://www.applied-math.org/optical_tempest.pdf

[stavros → consp]

Jeez, at this point we might as well assume you can collect information from anything. I bet someone has made something that can restore the image on your screen by the vibrations on the windows that the sound of the power supply makes as the data flows in.