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Re: [PEN-TEST] Penetration Testing and Van Eck Scanning
From: Johann van Duyn <johann.vanduyn () APPLETON COM>
Date: Wed, 8 Nov 2000 18:11:55 +0200

PGP Security had a "Tempest" surveillance prevention option in its secure
viewer (used when viewing encrypted text files), which is basically a
low-contrast window in which your text is viewed. That would probably
obfuscate the text if viewed from a van... I suppose high-contrast text is
easier to pick up that way. Hmmm... I can just imagine telling our Board of
Directors that they need to view all their documents in grey on grey...

-----Original Message-----
From: David Alexander [mailto:dalexander () TRISKELE CO UK]
Sent: 08 November 2000 17:59
Subject: Re: [PEN-TEST] Penetration Testing and Van Eck Scanning

I have never done it, but I have seen the results, it shows legible text.
Ross Anderson at Cambridge University has produced a set of word processing
software that can defeat V-E scanning using software only. What you see on
the screen is not what you see in the van - it's unintelligible. I don't
know how it works and I have no idea if anyone is picking up on it
David Alexander
Project Manager & Information Security Consultant
Qualified BS7799 Lead Auditor
Triskele Ltd.
Office  01491 833280
Mobile 0780 308 3130

-----Original Message-----

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