Speaking of TEMPEST....

I was able to procure a tempest specced HP Laserjet + (model 2686 TA),
used around a year ago and recently did a motherboard swap to upgrade
the unit to 2mb of RAM...wasn't all that much to rip apart and put back
together...even with all the damn machined-screws and shielding, the thing
still emits a fair amount of noise, but no farther than the room it's in...
I checked all my cables and system box and switched to shielded cables and
cleaned up the the noise as best I could...interesting design and at least
I would see the damn snoops...they'd have to be in my front yard to pick it
up...anyone else hack any used TEMPEST stuff?

David a.k.a. Unixorn

> I was able to procure a tempest specced HP Laserjet + (model 2686 TA),
> used around a year ago and recently did a motherboard swap to upgrade
> the unit to 2mb of RAM...wasn't all that much to rip apart and put back
> together...even with all the damn machined-screws and shielding, the thing
> still emits a fair amount of noise, but no farther than the room it's in...

How does one go about testing such a thing?

> I checked all my cables and system box and switched to shielded cables and
> cleaned up the the noise as best I could...interesting design and at least
> I would see the damn snoops...they'd have to be in my front yard to pick it
> up...anyone else hack any used TEMPEST stuff?

Is there any way of Jamming a computers emmisissions?  Just a thought.
+----------------------+----------------------------------------------------+
| J. Michael Diehl ;-) |  I thought I was wrong once.  But, I was mistaken. |
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| mdiehl@triton.unm.edu| "I'm just looking for the opportunity to be        |
| Thunder@forum        |            Politically Incorrect!                  |
| (505) 299-2282       |                        <me>                        |
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> How does one go about testing such a thing?

Anything that is interfered with will work, but listening to an AM
radio tuned to maximal interference is easy.  When you have no
audible interference, though, it just means that there's none left
that this will pick up.

> Is there any way of Jamming a computers emmisissions?  Just a thought.

Technically, sure.  But you'd need some kinda broadband licence to
operate it... legally.

> | J. Michael Diehl ;-) |  I thought I was wrong once.  But, I was mistaken. |

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