Linked by Thom Holwerda on Tue 26th Apr 2011 22:06 UTC
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RE[6]: Good read until the last line
by Neolander on Wed 27th Apr 2011 14:40
in reply to "RE[5]: Good read until the last line"
Sadly, paypal is not zero-locked, though it has the advantage of displaying the amount you're going to pay on the login page.
About physical terminals, I wonder... Instead of messing with an existing one, couldn't the attacker just build something which looks like a card reader, behaves like a card reader, but in fact only saves credit card information and PIN in a way that the hacker can later make a copy of the card whose PIN he has extracted and use it ?




Member since:
2008-11-19
Actually banking terminals are supposed to fault when tampered with, and afair they do have some crypto identifying them to the banks network. That said, couple years ago British scientists played tetris on one such terminal and further demonstrated a relay attack (when you think you're paying for one stuff but you're in fact paying for a simultaneous transaction in a nearby location).
These are still very impractictal to implement though. There's heavy crypto involved in this, with time constraints limiting the timeframe on which someone would use your unlocked private key. I'd say you're far more susceptible to theft of the card and PIN than a bogus terminal. All in all the "real world" debit card system is pretty sound, the internet part certainly could use some work.
Paypal and such systems are actually a fine answer. Zero-locked accounts you have to fill with some exact amount for payments are probably the best thing you can do beyond never paying anything on the internet.