[4586] in WWW Security List Archive
Re: ERM Surveillance Information
daemon@ATHENA.MIT.EDU (Steve Neruda)
Tue Feb 25 13:26:39 1997
Date: Tue, 25 Feb 1997 10:42:44 -0500
From: Steve Neruda <nerudas@nationwide.com>
To: Bill Joynt <billj@i2020.net>
CC: jwp@checfs1.ucsd.edu, www-security@ns2.rutgers.edu
Errors-To: owner-www-security@ns2.rutgers.edu
Bill Joynt wrote:
>
> I've heard some about this. Apparently first developed by the military,
> then copied by a company. Apparently the moniter emmisions carry up to a
> block (one report said picked up by cables/wires). The company claimed to
> have a working model, and were able to eavesdrop on computers from
> financial institutions to government.
>
> Shielded moniters are available, I believe, although expensive. Doesn't
> sound like a practical threat yet, but I have talked to a few people who
> are fairly good authorities that say it definitely exists.
>
TEMPEST shielded devices are very expensive. For the average user the
cheapest alternative is a laptop with an LCD screen. In fact it quickly
becomes cheaper to simply TEMPEST shield the entire building (which is
what is often done).
SteveN
