[8780] in cryptography@c2.net mail archive
Re: NSA tapping undersea fibers?
daemon@ATHENA.MIT.EDU (Matt Crawford)
Sun Jun 3 12:22:08 2001
Message-Id: <200106012229.RAA06852@gungnir.fnal.gov>
To: Peter Fairbrother <peter.fairbrother@ntlworld.com>
Cc: cryptography@wasabisystems.com
From: "Matt Crawford" <crawdad@fnal.gov>
In-reply-to: Your message of Fri, 01 Jun 2001 15:48:33 BST.
<B73D69D1.66A6%peter.fairbrother@ntlworld.com>
Date: Fri, 01 Jun 2001 17:29:16 -0500
> Cable companies do this (from the surface) when they repair cables, but they
> usually cut the cable before separately raising the cut ends and splicing in
> a new section. I doubt that cable would be strong or extensible enough to
> lift uncut, unless there was a lot of slack from eg a previous repair.
To lift the midpoint of a cable 1000 units long by 5 units requires
only 0.067 units of slack, or the ability to stretch by 0.0067%.
(This takes into account the catenary shape of the lifted cable.)
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