it cant be making a “connection”, just sending a few packets. and i’d say no-no for two-way encryption.
my guess is, it listens for a “magic packet”, and transmits a database id # when it gets that magic packet. one-way encryption at best.

of course that means you cant hack it, you can only steal other people’s accounts (d*mn you if you do either!). and pda’s (at least not wince devices) dont have the necessary sniffing equipment.

if you’re curious, grab a laptop with wifi, some data logging software, an E-Z Pass, and drive through the tollbooth. that’s the ticket (pun intented)