From: Darren Reed <avalon@coombs.anu.edu.au>
Date: Tue, 15 Mar 94 17:47:00 PST
To: mimsy!anagld!decode!system@uunet.uu.net (System Operator)
Subject: Re: spyproofing your house/work building
In-Reply-To: <7kB9ic1w165w@decode.UUCP>
Message-ID: <9403160146.AA03285@toad.com>
MIME-Version: 1.0
Content-Type: text/plain


> 
> 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 ?