[conspire] Cellphones and GSM privacy

Paul Zander paulz at ieee.org
Tue Jun 26 15:50:46 PDT 2012

Aluminum foil with tight seams!

--- On Tue, 6/26/12, Rick Moen <rick at linuxmafia.com> wrote:

From: Rick Moen <rick at linuxmafia.com>
Subject: Re: [conspire] Cellphones and GSM privacy
To: conspire at linuxmafia.com
Date: Tuesday, June 26, 2012, 2:07 PM

Quoting Ehud Kaldor (ehud.kaldor at gmail.com):

> > The way you head off that possibility is to yank the battery
> which excludes all iPhone devices.

I imagine that yanking the SIM (subscriber identity module) would be
somewhat useful, as that's what ties the telephone number (and you) to
the telephone.  It has what's called an ICCID (integrated circuit card
identifier) number burned into it, that's unique to it.  The telco adds
to it an international mobile subscriber identity (IMSI) that is
specific to you personally.

The telephone itself has what's called an IMEI (International Mobile
Equipment Identity.  Any GSM phone sends its IMEI to the cellular
network as part of getting access.  That's what permits blacklisting of
reported-stolen devices.

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