NODE 7e679927Re: spyproofing your house/work building
System Operator <mimsy!anagld!decode!system@uunet.UU.NET>Tue, 15 Mar 94 05:42:09 PST
Don Melvin <anagld!access.digex.net!storm> writes:
> > Have I forgotten anything?
> >
> Guard physical access so a mic/camera (1/8") can't be placed after
> construction.
>
> Drapes so the lip readers can't see you.
Make sure the drapes block IR. There are instances of even local
police forces flooding the front of a house with IR light, and
viewing the activities inside with IR viewers -- all of this
through closed drapes.
--
system@decode.UUCP (System Operator)
Cryptography, Security, Privacy BBS +1 410 730 6734 Data/FAX
NODE 58502cc1Re: spyproofing your house/work building
"Perry E. Metzger" <pmetzger@lehman.com>Tue, 15 Mar 94 08:17:53 PST
System Operator says:
> Don Melvin <anagld!access.digex.net!storm> writes:
>
> > > Have I forgotten anything?
> > >
> > Guard physical access so a mic/camera (1/8") can't be placed after
> > construction.
> >
> > Drapes so the lip readers can't see you.
>
> Make sure the drapes block IR. There are instances of even local
> police forces flooding the front of a house with IR light,
You mean heat? What did they do, exactly? Erect giant heat lamps in
front of the house? No one inside noticed either?
NODE 2152c34bRe: spyproofing your house/work building
Chris Knight <cknight@crl.com>Tue, 15 Mar 94 13:02:16 PST
On Tue, 15 Mar 1994, Perry E. Metzger wrote:
> > Make sure the drapes block IR. There are instances of even local
> > police forces flooding the front of a house with IR light,
>
> You mean heat? What did they do, exactly? Erect giant heat lamps in
> front of the house? No one inside noticed either?
IR does not mean heat. Infra-Red only implies having a wave frequency
lower than that of "red" light. There are several bandwidths of IR used
for nightscopes that cannot be felt as heat, nor do they increase
the surface temperature of the target area to a noticable extent.
-ck
NODE 47a4a885Re: spyproofing your house/work building
Darren Reed <avalon@coombs.anu.edu.au>Tue, 15 Mar 94 17:47:00 PST
>
> Don Melvin <anagld!access.digex.net!storm> writes:
>
> > > Have I forgotten anything?
> > >
> > Guard physical access so a mic/camera (1/8") can't be placed after
> > construction.
> >
> > Drapes so the lip readers can't see you.
>
> Make sure the drapes block IR. There are instances of even local
> police forces flooding the front of a house with IR light, and
> viewing the activities inside with IR viewers -- all of this
> through closed drapes.
What sort of materials DO block IR ? Lycra ? Wool ? Cotton ?
And how do we test drapes without buying them first ?