[2020] in cryptography@c2.net mail archive
Re: Mobile phones used as trackers
daemon@ATHENA.MIT.EDU (Simon Spero)
Tue Dec 30 18:14:22 1997
Date: Tue, 30 Dec 1997 18:07:50 -0500 (EST)
From: Simon Spero <ses@tipper.oit.unc.edu>
To: Phil Karn <karn@qualcomm.com>
cc: davidw@datamgmt.com, cryptography@c2.net, perry@piermont.com
In-Reply-To: <199712302236.OAA25030@servo.qualcomm.com>
On Tue, 30 Dec 1997, Phil Karn wrote:
Phil, you missed the opportunity to blame it all on GSM. Hope marketing
doesn't hit you :-)
> The only countermeasure I can think of against registration tracking
> is to keep your cell phone turned off anywhere you don't want the
> world to know you've visited. One alternate way to receive your calls
What about (somewhat) ephemeral blinded IDs, using pre-paid ecash to pay
unit charges. Could almost be done just by changing the way SIMs are
generated.
Simon
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