1993-11-08 - Re: tapping hardware? (was re: Mark Abene (Phiber Optik) sentenced)

Header Data

From: Brad Huntting <huntting@glarp.com>
To: Timothy Newsham <newsham@wiliki.eng.hawaii.edu>
Message Hash: ad28c612dd2c559dea6c74774dcf4a45f2ab7f379cf2514ac801d3665d70fe09
Message ID: <199311081947.AA09591@misc.glarp.com>
Reply To: <9311080705.AA15339@toad.com>
UTC Datetime: 1993-11-08 19:48:23 UTC
Raw Date: Mon, 8 Nov 93 11:48:23 PST

Raw message

From: Brad Huntting <huntting@glarp.com>
Date: Mon, 8 Nov 93 11:48:23 PST
To: Timothy Newsham <newsham@wiliki.eng.hawaii.edu>
Subject: Re: tapping hardware? (was re: Mark Abene (Phiber Optik) sentenced)
In-Reply-To: <9311080705.AA15339@toad.com>
Message-ID: <199311081947.AA09591@misc.glarp.com>
MIME-Version: 1.0
Content-Type: text/plain



> I have heard that tapping high speed modems can be a little tricky
> because of the adaptive filtering done.  The modems both have
> adaptive filters that adjust to the line as they see it.  If you
> are tapping at some other point the filtering will not be optimimal
> for your case.  I believe these filters take care of smearing and
> echos and things of that nature.

Hmm...  As part of the tap, introduce just enough distortion or
noise to cause the modems to fallback to a slower bit rate.  This
is somewhat intrusive of course and so it might be noticed, but it
could make taping a line much cheaper.


brad

Thread

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• 1993-11-06 (Sat, 6 Nov 93 13:22:45 PST) - Mark Abene (Phiber Optik) sentenced - ferguson@icm1.icp.net (Paul Ferguson x2044)
  • 1993-11-07 (Sun, 7 Nov 93 07:03:11 PST) - Re: Mark Abene (Phiber Optik) sentenced - Mike Godwin <mnemonic@eff.org>
  • 1993-11-08 (Sun, 7 Nov 93 18:48:14 PST) - tapping hardware? (was re: Mark Abene (Phiber Optik) sentenced) - “Mark W. Eichin” <eichin@paycheck.cygnus.com>
    • 1993-11-08 (Sun, 7 Nov 93 21:08:14 PST) - Re: tapping hardware? (was re: Mark Abene (Phiber Optik) sentenced) - David Kovar <kovar@nda.com>
      • 1993-11-08 (Sun, 7 Nov 93 23:08:17 PST) - Re: tapping hardware? (was re: Mark Abene (Phiber Optik) sentenced) - Timothy Newsham <newsham@wiliki.eng.hawaii.edu>
        • 1993-11-08 (Mon, 8 Nov 93 11:48:23 PST) - Re: tapping hardware? (was re: Mark Abene (Phiber Optik) sentenced) - Brad Huntting <huntting@glarp.com>
        • 1993-11-08 (Mon, 8 Nov 93 12:23:03 PST) - Tapping modem transmissions - Matthew J Ghio <mg5n+@andrew.cmu.edu>
          • 1993-11-08 (Mon, 8 Nov 93 13:08:47 PST) - Re: Tapping modem transmissions - A1 ray arachelian (library) <rarachel@ishara.poly.edu>
    • 1993-11-08 (Mon, 8 Nov 93 02:13:36 PST) - Re: tapping hardware? (was re: Mark Abene (Phiber Optik) sentenced) - kelly@netcom.com (Kelly Goen)