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神经网络昆斯林的新闻组分类2006

Newsgroups: sci.crypt
From: [e-mail] ("Mike H.")
Path: cantaloupe.srv.cs.cmu.edu!magnesium.club.cc.cmu.edu!news.sei.cmu.edu!fs7.ece.cmu.edu!europa.eng.gtefsd.com!darwin.sura.net!howland.reston.ans.net!zaphod.mps.ohio-state.edu!cs.utexas.edu!uunet!pipex!demon!avon.demon.co.uk!mike
Subject: Re: Clipper Chip and crypto key-esc 
Distribution: world
References: <[e-mail]>
Organization: boring
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Date: Thu, 22 Apr 1993 21:05:15 +0000
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In article <[e-mail]> [e-mail] writes:

>I thought it was quite difficult to record a modem session at some
>intermediate point on the line. Maybe they have taken a crash course
>in data comms and have a unit that demodulates the tones and stores the
>digital stream for decryption later. This would still suffer from the

>called BABT. It has been stated, either here or in the uk.telecom group,
>that they will not approve equipment that does encryption. I don't know
>if this is true or not, but this would make a good test case.
>
>                Peter Ilieve            [e-mail]

You forget the obvious! If it is an *authorised* tap then it can be done at
the exchange. If the exchange is *digital* then I suspect that you can
auto-monitor a line and pickup the full link. Therefore syncing a piggyback
modem on the line would not be impossible - I suspect.
-- 

                        Mike H. ([e-mail])