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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:16:06 ADT
Paul H. Merrill (paulmerrill@acm.org)
Wed, 18 Mar 1998 22:30:18 -0800
the initial TEMPEST demo was something like 16 miles and three
transformers. But . . . it was teletype
William H. Geiger III wrote:
>
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> In <v04010c06b135c115e206@[192.187.167.52]>, on 03/18/98
> at 11:28 AM, Dave Del Torto <ddt@LSD.com> said:
>
> >At 07:36 am -0700 3/18/98, William H. Geiger III wrote:
> >> [snip]
> >>I *never* do any sensitive work on a network computer. I have a shielded
> >>box that runs on battery power only (extra bonus points if you know why it
> >>isn't connected to the local power grid). [...]
>
> >Probably because of the recent proof (some of us saw it in operation at
> >HIP'97) of a TEMPEST-type kit (from a German researcher whose name I'm
> >forgetting just now) that reconstitutes screen images from any CRT on the
> >power grid of a given building. Half-credit? ;)
>
> >There's good reason to be concerned about this sort of surveillance, I
> >agree. It's become trivially easy to do it, such that even an operative
> >who's otherwise constitutionally restricted while on duty could hack
> >something together in his/her spare time, just for "fun."
>
> Has anyone done any research on transformers and wether they block 100% of
> any data that may be leaked?
>
> While the risk of data leakage through the local power loop has been known
> for a long time it was commonly assumend that this data could not be
> intercepted once you were past the first transfomer.
>
> After reading about one of the power companies (the name excapes me right
> now) finding a way to do network communications over the power grid I
> started having second thoughts. Does anyone have any references on this?
> Are they using some type of bypass on the transformers or have they found
> a way to pass the data through them?
>
> - --
> - ---------------------------------------------------------------
> William H. Geiger III http://users.invweb.net/~whgiii
> Geiger Consulting Cooking With Warp 4.0
>
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The following archive was created by hippie-mail 7.98617-22 on Fri Aug 21 1998 - 17:16:06 ADT