[LINK] RFI: Contactless Credit Cards in Oz

Tom Worthington tom.worthington at tomw.net.au
Wed Jan 6 15:59:12 AEDT 2010

Roger Clarke wrote:
> ... credit-cards in Australia that contain a *contact-based* chip ...

Yes, they seem to be working okay.

> ... *contactless* chips were being issued here; ...

Yes, The wikipedia entry is quite good on the topic: 

> (b) the contactless chip was being used for credit-card puroposes
>      (as distinct from eCash or ticketing). ..

Yes, my understanding was that the contactless function was limited to 
small e-Cash type payments Visa payWave cards limited to $100 from the 
National Australia Bank (NAB): 
  and Commonwealth Bank:

The limit of $100 sounds a bit high to me and I seem to recall another 
bank setting the limit at $30, which sounds more reasonable.

According CeBit there are three million of these cards issued, so if 
there is a problem with them, it would be good to sort it out quickly: 

ps: Professor Klerphell discussed RF shielded wallets to keep such cards 
in: <http://mailman.anu.edu.au/pipermail/link/2004-February/055071.html>.

At the time this was a joke, but with IEDs becoming more sophisticated, 
RFID cards may be a real danger. There are shielded wallets available to 
put the RFID cards in, but I am not sure how well they work: 

Tom Worthington FACS HLM, TomW Communications Pty Ltd. t: 0419496150
PO Box 13, Belconnen ACT 2617, Australia  http://www.tomw.net.au
Adjunct Lecturer, The Australian National University t: 02 61255694
Computer Science http://cs.anu.edu.au/people.php?StaffID=140274

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