Date: Fri, 2 Jul 2004 21:34:20 -0400
From: Dave Emery <[EMAIL PROTECTED]>
Subject: EZ Pass and the fast lane ....

        No mention is made of encryption or challenge response
authentication but I guess that may or may not be part of the design
(one would think it had better be, as picking off the ESN should be duck
soup with suitable gear if not encrypted).

From a business perspective, it makes no sense to spend any money on crypto for this application. If it is free, sure use it, but if not, then worry about the 0.01% of users who fiddle the system later on.

It would be relatively easy to catch someone
doing this - just cross-correlate with other
information (address of home and work) and
then photograph the car at the on-ramp.

If the end result isn't as shown through
other means, then you have the evidence.
One high profile court case later, and the
chances of anyone copying this to escape
a toll fare shrink into the ignorable.


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