[15737] in cryptography@c2.net mail archive
Re: EZ Pass and the fast lane ....
daemon@ATHENA.MIT.EDU (David Alexander Molnar)
Sun Jul 11 19:55:56 2004
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Sat, 10 Jul 2004 17:32:07 -0700 (PDT)
From: David Alexander Molnar <dmolnar@EECS.berkeley.EDU>
To: "Perry E. Metzger" <perry@piermont.com>
Cc: cryptography@metzdowd.com
In-Reply-To: <87llhrwl0i.fsf@snark.piermont.com>
On Sat, 10 Jul 2004, Perry E. Metzger wrote:
> another purpose -- preserving the privacy of drivers by using more
> complicated protocols. However, as the benefit of such systems is to
> people who are unlikely to have much voice in the construction of the
> system, and who are also unlikely to be willing to pay more money to
> gain privacy, I think the implementation of such tags is unlikely.
I think it would be easier to provide drivers with a simpler method of
turning off their transponder. Recently ordered FasTrak tokens come with a
mylar bag for this purpose, which is too unwieldy. A switch, however,
might be enough.
This would not prevent an adversary from recording the IDs of cars that
pass through toll gates. It would, however, prevent reading those IDs at
other times.
-David
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