[8049] in cryptography@c2.net mail archive
Re: BSA deploys imaginary pirate software detector vans
daemon@ATHENA.MIT.EDU (Steve Schear)
Thu Nov 16 09:55:28 2000
Message-Id: <4.3.2.7.0.20001113184726.05544f00@pop3.lvcm.com>
Date: Mon, 13 Nov 2000 18:49:59 -0800
To: "Neil Johnson" <njohnson@interl.net>, "Tib" <tib@tigerknight.org>,
"Ian BROWN" <I.Brown@cs.ucl.ac.uk>
From: Steve Schear <schear@lvcm.com>
Cc: "cypherpunks" <cypherpunks@EINSTEIN.ssz.com>,
"cryptography" <cryptography@c2.net>,
"cypherpunks" <cypherpunks@cyberpass.net>,
<ross.anderson@cl.cam.ac.uk>
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At 07:12 PM 11/13/00 -0600, 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.
>
>TEMPEST is the "code" name for the U.S. Governments standards for shielding
>computer equipment used for classified work inorder to prevent such
>eavesdropping.
>
>The technique is often referred to as "Van Eck Phreaking" (sic).
As I recall one suggested method in the paper involved some cleaver
manipulation of pixel intensities and/or location to create the equivalent
of a high process gain spread spectrum signal. Brilliant concept.
steve
