A modified OTDR (Optical Time-Domain Reflectimeter)?
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> From: Maiwald, Eric <MaiwaldE @
nasd .
com>
> To: 'Firewalls List' <firewalls @
GreatCircle .
COM>
> Subject: Re: Can fiber optics be tapped
> Date: Friday, November 01, 1996 2:54 PM
>
>
> Please excuse the terminalogy as I am not
> an optical engineer.
>
> I seem to recall hearing about devices that
> could detect a tap in fiber. They worked by
> sending light at frequencies slightly different
> than the primary channel. If the fiber were
> bent to tap the light, the other frequencies
> would attenuate a larger amount than the
> primary channel thus allowing a monitor
> to "see" the tap.
>
> Any body else hear of these things?
>
> Eric
>
>
>
> Eric Maiwald
> Assistant Director, Information Security
> NASD Production Services
> 9513 Key West Ave.
> Rockville, MD 20850
> 301-208-2954
> email: maiwalde @
nasd .
com
>
>
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