14 Nov
2000
14 Nov
'00
12:01 p.m.
At 08:13 PM 11/13/00 -0500, Neil Johnson wrote:
The general idea is to pick up and decode the RF emissions generated by the CPU, Memory, I/O and Video systems to figure out what the computer is doing.
It takes some work (not as much as you would think), but there have been documented demonstrations where the video signals from a PC were picked up and reproduced on another monitor several hundred feet away.
Get an AM radio. Write a program to paint and clear the CRT at two different, rates and alternate between them. Now locate the alternating tones on your radio.