On Tue, 2007-07-31 at 19:47 +0100, Tony Groves wrote:
> Am I right in thinking that all RFID cards for a particular reader have
> to be identical? That would be no use. Each card has to be unique to the
> individual holder, for the purposes of authorisation checking and usage
> logging.
>
Why don't you have a look at these:
http://www.maxim-ic.com/products/ibutton/
Not contactless, but the form factor is a lot easier to carry around.
They are tough as well, I ran mine over with the car, it still works...
Phil
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