From: sdw@meaddata.com (Stephen Williams)
Date: Wed, 22 Dec 93 11:05:34 PST
To: ravage@wixer.bga.com (Jim choate)
Subject: Re: eavesdropping detection
In-Reply-To: <9312221537.AA29903@wixer>
Message-ID: <9312221902.AA25168@jungle.meaddata.com>
MIME-Version: 1.0
Content-Type: text/plain


...
> For spike microphones and such there are two methods of defense, easy and
> hard. The easy way is to set of some kind of noise generator to mask the
> sounds and do a physical search of the outside of the building w/ a linemans
> induction pickup. If the mike's are using cable (not rf or you would have
> found them w/ the spectrum analyzer) then you should hear the signal at some
> point. The hard way (assuming they are sending the signal in some other way
> other than rf or land line, say a pwm laser) is to get yourself a set of IR
> goggles and check the place out.

Most camcorders can see IR normally and have an IR filter that sometimes
can be removed.  Turning off the lights will help.

> Hope this helps....
> 
> Have a Merry Christmas
> 

sdw
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