Contactless bank cards

[Roland Perry]

In article <m1q2e69m38nap333s3rmf9db9lbon25ors at 4ax.com>, Marcus 
Williamson <marcus at connectotel.com> writes
>What's the technology behind it? A type of RFID?

Yes.

>If so, what's to stop someone reading the card without your son knowing 
>and/or making small transactions without his knowledge?

Surely you'd have to set up some sort of "man in the middle" between the 
card and one of the Paywave terminals[1]. Wouldn't that be a bit tricky 
in real time?

[1] Either a hacked one, or a normal one with some sort of "RFID 
simulator" held on the outside.
-- 
Roland Perry