From: "Jean-Francois Avon" <jf_avon@citenet.net>
Date: Sat, 11 May 1996 14:32:19 +0800
To: cypherpunks@toad.com
Subject: [hrdware] anti-Tempest video settings
Message-ID: <9605102331.AA09365@cti02.citenet.net>
MIME-Version: 1.0
Content-Type: text/plain


Hi again.

Is there anybody that have any idea about a color setting that would 
make it more difficult to detect by a Tempest attack?
(I assume that Tempest cannot discriminate between various color guns 
and signals in the monitor...  Maybe I am completely wrong...)


Like, for example : 

background: G255 B0   R0
      text: G0   B255 R0

Theses colors are not that bad to look at.  I realize that Tempest is 
sensitive to actual electrical values rather than logical values.

Anybody has any idea about settings that could fool Tempest?

Crypto Relevancy:
I was writing a passphrase file to later be secsplitted and I suddenly got 
all sweaty and nervous ...  :-)

Ciao all

JFA


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