The flaw in the system is the so-called "Yellow Path" for authentication, in which a card isn't automatically accepted (Green Path) or rejected (Red Path), but requires additional provisioning by the bank to be added to Apple Pay. When Yellow Path is successful, the bank will beam an encrypted version of card details to be stored on the Secure Element of the phone. But then, ironically, criminals often use the stolen phone, card, and identity to buy stuff at—an Apple store.
Some have said that the problem stems from Apple failing to make Yellow Path checks mandatory until less than one month before Apple Pay launched, leaving banks little time to refine and implement strong provisioning processes.
In the card business, losses of 10 cents per $100 in transactions are seen as inevitable, using standard tech. So when Apply Pay came online with its newfangled security, everyone was expecting fraud rates to be a fraction of 10 cents. But at least one card provider has seen fraud rates of $6.00 per $100, calling into question the idea that Apple Pay is secure. In reality, Apply Pay is secure, but the bank processes on which it ultimately relies are a very weak link.
JP Morgan Chase said on an investor call that more than a million customers had added debit and credit cards to Apple’s service, while Bank of America has previously said 800,000 people had added 1.1m cards in 2014, making it the predominant mobile payment method in the U.S., displacing Google Wallet, which launched in 2011.
In 2013, total losses from ID fraud in the US totalled $24.7 billion, with the average incident costing $4,930. If Apply Pay catches on (and banks don't get smarter), those numbers could be just the beginning.
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