A post relating to this item from Finextra:
14 September 2009 | 11746 views | 1
The US payments industry should use contactless chip cards along with dynamic cryptograms - rather than end-to-end data encryption - in the fight against fraudsters, according to an industry associati...
Randy Vanderhoof of the Smart Card Alliance speaks a great deal of common sense about end-to-end encryption. It won't do anything to prevent replay attacks, nor to take the value out of stolen ID data. All it does is protect data-at-rest at intermediaries,
and data-in-motion through a portion of the payment processing chain. So the black market in stolen account details will not be impacted.
The fundamental problem with end-to-end encryption, unsurprisingly, is at the ends. The point at which stolen card data can be injected at merchants is not protected by E2EE.
Randy's analogy that E2EE "may be more akin to putting a steel door on a grass hut" is evocative but not quite right. A more telling comparison would be using an armoured car to transfer cash from a merchant to the bank, but leaving the cash in a cardboard
box for collection on the sidewalk outside the shop. The card payments system remains vulnerable to attack at the interface between merchant and processor. E2EE won't stop the sorts of attack mounted by organised crime at large merchants (like TJMaxx); all
it does is mitigate against heists occurring within the processors. So as a "risk management" measure, it's very selective as to whose risk it manages. E2EE might have the unintended consequence of making merchants more attractive as targets for ID thieves.
What then? Perhaps another cycle of more
yet more onerous PCI requirements?