[hrdware] Is Tempest detecting only video?

["Jean-Francois Avon" <jf_avon@citenet.net>]

On 11 May 96 at 20:35, jim bell wrote:

>  I'm waiting for cheap flat-panel displays for desktop computers
> to arrive, because they will probably be almost impossible to
> detect usably by Tempest systems.

Does Tempest detects only the emission from the electron gun in the 
monitor or can it get a usable "lock" on some other signals generated 
within a computer?

As an example, can it grab the keystrokes?  If the answer is yes, can 
it do it:

a) rarely
b) occasionally
c) most of the time
d) almost all of the time
e) never

Could somebody knowledgeable in Tempest can rate the various 
emissions from a computer?

(such as: keyboard, COM port, modem, lpt, video signal(from the 
card), disk write, monitor emission, network comms, etc)

Ciao

JFA
Just curious...





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