[5473] in cryptography@c2.net mail archive
Re: Controlled CPU TEMPEST emanations
daemon@ATHENA.MIT.EDU (Zombie Cow)
Thu Aug 26 10:42:17 1999
Date: Thu, 26 Aug 1999 16:15:58 +0300 (EEST)
From: Zombie Cow <waste@zor.hut.fi>
To: Berke Durak <durakb@crit2.univ-montp2.fr>
Cc: cryptography@c2.net
In-Reply-To: <m11GPk4-002fmEC@kli.org>
On Mon, 16 Aug 1999, Berke Durak wrote:
> Hello,
>
> After having implemented and successfully tested Ross Anderson's idea
> to use the video output to synthesize a mediumwave AM signal, I
> wondered if a similar effect could be obtained by using only the CPU,
> since it was easy to correlate CPU activity with radio noise. I've
> just written a quick C program that tries to force activity on the
> memory bus in a repetitive pattern, with adjustable frequency. After
...
How easy would it be to include some electronics or use
the circuitry in keyboards and have them emit signals?
How vulnerable are keyboards to emitting tempest emanations?
