The UK Cards Association (previously known as APACS) has
written to the University of Cambridge asking them to remove a paper, claiming that it contains information that might be of use to criminals. The thesis, from a
master's project by Omar Choudary, showed how to build a device that protects cardholders from tampered Chip & PIN terminals.
Professor Ross Anderson
responded to the request, and refused to censor Omar's research:
“Second, you seem to think that we might censor a student’s thesis, which is lawful and already in the public domain, simply because a powerful interest finds it inconvenient. This shows a deep misconception of what universities are and how we work. Cambridge
is the University of Erasmus, of Newton, and of Darwin; censoring writings that offend the powerful is offensive to our deepest values. Thus even though the decision to put the thesis online was Omar’s, we have no choice but to back him. That would hold even
if we did not agree with the material! Accordingly I have authorised the thesis to be issued as a Computer Laboratory Technical Report. This will make it easier for people to find and to cite, and will ensure that its presence on our web site is permanent.”
Brilliant and just the right response.
Could you clarify the hardware cost of this attack? Some figures were quoted in the press, but I'd be interested to hear first-hand.
The hardware costs would be small. Its hard to put a number on it because it dramatically depends on how many of the devices are manufactured. My estimate is that if you wanted to manufacture 10, it would cost about $100, including labour. If you wanted
to manufacture 100,000 it would cost about $10.
To clarify, 10 units cost $100 ($10/unit) or 10 units cost $100/unit?
I assume you meant $100/unit when manufacturing 10 units. In my opinion, this makes the attack practical.
$100 per unit (very approximately; for low quantities component cost can easily vary by a factor of 5 depending on supplier and how soon the components are needed).
© Finextra Research 2015