Re: [TSCM-L] {1559} Re: [TSCM-L] Who has what? - compromising emanations

From: James M. Atkinson <jm..._at_tscm.com>
Date: Sat, 12 May 2007 14:09:09 -0400

I like the DSI R-1550 which will give you coverage from 20 Hz to 40
GHz all in the same system, with a capability to detect and measure
signals down to -215 dBm, or 40 dB deep into the noise floor (I kid
you not), but only to -164 dBm without performing a hat trick with
the noise floor..

The wideband capabilities of the DSI R-1550 give you some very
interesting capabilities because you have ID bandwidth of 200 MHz,
and above (on a center frequency of 1450 MHz), so you can tweak the
radio to give you a bandwidth of over 450 MHz.

They also have a sweet little Raster Analyzer box that does with the
radio and a nice spread spectrum detection interface as well.

---
If you use a multi channel AD converter for a SDR you can  run the 
samplers at a slight time offset from each other to create a spectrum 
that is six times wider then using just a single channel. The coolest 
implementation I have seen of this yet used 24 Analog Devices, 2 
channel AD convertors to provide 48 actual channels which when 
combined give you an instantaneous bandwidth of 3.6 GHz in a single 
box. The only wrinkle is that you end up getting so much information 
that you get the "drinking from a fire hose" problem biting you as 
you can fill a 2 TB hard drive array real quick.
-jma
At 08:40 PM 5/11/2007, coderman wrote:
>On 5/10/07, Nick Named <xxr..._at_twcny.rr.com> wrote:
> >
> > Which law enforcement agencies have signals intelligence capability?
> > The kind of capability TEMPEST was designed to protect against.
>
>that's a great question.  i hope someone on the list knows the answer...
>
>
> > Is there capability like that in private hands? Could someone do
> > something like that  with a laptop, a directional antenna and
> > something like gnuradio - http://www.gnu.org/software/gnuradio?
>
>Markus Kuhn at Cambridge [0] has built emanations monitoring gear for
>reading laptop displays at considerable distance [1] using an R-1250
>[2] (and other hardware, iiirc).  this would also be possible with the
>right RF front ends attached to the nallatech hardware i referenced in
>another thread.  (the GNU radio USRP might be suitable, but the
>bandwidth limits of that device would be close, or under what was
>needed for good visual capture)
>
>gnu radio does indeed provide some of the base signal processing
>components that could be used for this purpose, but the hardware, not
>processing, will likely be the crux.
>
>best regards,
>
>0. Markus Kuhn
>    http://www.cl.cam.ac.uk/~mgk25/
>
>1. Compromising emanations: eavesdropping risks of computer displays
>    http://www.cl.cam.ac.uk/techreports/UCAM-CL-TR-577.html
>
>2. Dynamic Sciences R-1250 receiver
>    http://www.cl.cam.ac.uk/~mgk25/r1250/
>
>
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Received on Sat Mar 02 2024 - 00:57:17 CST