[9279] in cryptography@c2.net mail archive
Re: NYC events and cell phones
daemon@ATHENA.MIT.EDU (Jay D. Dyson)
Fri Sep 14 22:36:32 2001
Date: Thu, 13 Sep 2001 14:57:12 -0700 (PDT)
From: "Jay D. Dyson" <jdyson@treachery.net>
To: Cryptography List <cryptography@wasabisystems.com>
In-Reply-To: <200109131159.f8DBxd204537@coredump.cs.columbia.edu>
Message-ID: <Pine.GSO.3.96.1010913144643.16890D-100000@crypto>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
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On Thu, 13 Sep 2001, Angelos D. Keromytis wrote:
> An interesting bit of information: on Tuesday afternoon, to the extend
> that cellphones operated, GSM encryption was turned off throughout
> Manhattan. My GSM phone would repeatedly warn me of this on every call I
> made (or tried to make). As of Wednesday morning, things were back to
> normal.
When the twin towers collapsed, down with them went a number of
cellular towers. Coverage was immediately diminished (if not blacked
out). As a result, the 1.9 GHz band used by GSM in the United States was
likely inaccessible until backup or redundant towers in the area were
reactivated.
- -Jay
( ( _______
)) )) .--"There's always time for a good cup of coffee"--. >====<--.
C|~~|C|~~| (>------ Jay D. Dyson -- jdyson@treachery.net ------<) | = |-'
`--' `--' `-- What doesn't kill us only makes us stronger. --' `------'
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