The vulnerability in Apple Pay is in the way that it — and card issuers — “onboard” new credit cards into the system. Because Apple wanted its system to have the simplicity for which it has become famous and wanted to make the sign-up process “frictionless,” the company required little beyond basic credit card information about a user. Nor did it provide much information to the banks, like full phone numbers and addresses, that might help them detect fraud early.
The banks, desperate to become their customers’ default card on Apple Pay — most add only one to their iPhones — did little to build their own defenses or to push Apple to provide more detailed information about its customers. Some bank executives acknowledged that they were were so scared of Apple that they didn’t speak up."
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