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Article #4126

Re: Microwaves and security

#4126
From: aglew
Date: Sat, 12 Mar 1988 00:58
26 lines
1661 bytes
..> Tapping fiber optics

How long can you send a fiber optic signal without requiring repeaters?
When I was in school it was on the order of 10s of kilometers max;
guessing that it might be up to 1000s by now (can't keep track of everything,
sigh) then every so often you have a repeater that uses some electric
effects that is liable to bugging.

A friend who was working on laser repeaters for a transatlantic cable said
(1) that the power of the repeaters was pretty high, and (2) that they
were fed by power in a wire that ran beside the fibers. The first
makes it easier to bug, the second means that you may be able to detect
sympathetic effects quite a way away from the repeater.

Send mail to reply - I don't get here very often any more.


Andy "Krazy" Glew. Gould CSD-Urbana.    1101 E. University, Urbana, IL 61801   
    aglew@gould.com     	- preferred, if you have MX records
    aglew@xenurus.gould.com     - if you don't
    ...!ihnp4!uiucuxc!ccvaxa!aglew  - paths may still be the only way
   
My opinions are my own, and are not the opinions of my employer, or any
other organisation. I indicate my company only so that the reader may
account for any possible bias I may have towards our products.
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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!hao!ames!pacbell!att-ih!ihnp4!inuxc!iuvax!pur-ee!uiucdcs!uxc.cso.uiuc.edu!ccvaxa!aglew
From: aglew@ccvaxa.UUCP
Newsgroups: sci.crypt
Subject: Re: Microwaves and security
Message-ID: <22700002@ccvaxa>
Date: 12 Mar 88 00:58:00 GMT
References: <6879@netsys.UUCP>
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Nf-ID: #R:netsys.UUCP:6879:ccvaxa:22700002:000:1218
Nf-From: ccvaxa.UUCP!aglew    Mar 11 18:58:00 1988