> But guessing 2 digits correctly isn’t that easy, right? The first few digits of card numbers refer to the provider (Visa, Amex, etc) [0]. Given that Paypal g

> But guessing 2 digits correctly isn’t that easy, right? The first few digits of card numbers refer to the provider (Visa, Amex, etc) [0]. Given that Paypal gave the last four digits of the card, I'm surprised they wouldn't give out the provider as well, so guessing this would be even easier. [0] https://github.com/stripe/jquery.payment/blob/master/src/jquery.payment.coffee#L11 https://github.com/stripe/jquery.payment/blob/master/src/jqu...