In message
.
net, at 07:55:38 on Mon, 17 Dec 2012, Neil Williams
remarked:
Which implies that an almost unlimited amount of historic transaction
information is sent with every wave.

Not really, the retailer's POS system can do this with nothing more than
the card number.

But the facility in question is being sold as an *alternative* to the
retailer having to install such a POS system with instant access to
their internal database of historical transactions.

Bus ticket inspections could be done by having the ticket machine print out
a ticket containing the last 4 digits of each credit card used during that
journey, perhaps. Or more technologically, communicate it to the
electronic gripping irons.

They could, yes. But *are* they? (Minor niggle: the Paywave terminals on
the buses don't have printers).
--
Roland Perry