[LINK] RFI: PayWave/PayPass Contactless Chip Cards
Roger Clarke
Roger.Clarke at xamax.com.au
Wed Apr 11 16:29:11 AEST 2012
>On 11/04/2012 3:33 PM, Roger Clarke wrote:
>> 2. The contactless chip that
>> supports Visa PayWave and MasterCard PayPass is embedded in the card
>> (along with the induction coil), and can't be seen.
At 16:20 +1000 11/4/12, Stephen Wilson wrote:
>Actually no, it's all in the one chip now. A single "dual interface"
>chip talks to the outside world through either the gold plated contacts
>you see on the surface, or an antenna buried in the plastic. Scratching
>off the contacts need not affect the wireless channel. ...
Damn!
I *knew* I should've updated myself more frequently than once per 5-8
yrs (:-(}
Steve, what's the robustness of the antenna / coil like these days,
and of its connection to the chip?
--
Roger Clarke http://www.rogerclarke.com/
Xamax Consultancy Pty Ltd 78 Sidaway St, Chapman ACT 2611 AUSTRALIA
Tel: +61 2 6288 1472, and 6288 6916
mailto:Roger.Clarke at xamax.com.au http://www.xamax.com.au/
Visiting Professor in the Faculty of Law University of NSW
Visiting Professor in Computer Science Australian National University
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