3 ms·
Unless you know every other digit in the card number, I don't see how knowing the luhn algorithm is going to narrow the possibilities of guessing just the two d
by WatchDog 13y ago
Unless you know every other digit in the card number, I don't see how knowing the luhn algorithm is going to narrow the possibilities of guessing just the two digits.
- unreal37 13y agoAlso credit card can never be used by itself for any purchase, ever. You must have the name, expiry date, and if you're doing transactions online, often the address and ccv2 as well.
- jrockway 13y agoAs far as I know, not true. Merchants get discounts for asking for more information, but it's not strictly required to process your card.
- swombat 13y agoIt depends on the bank. Some require more data than others. In either case, though, if the transaction turns out to be fraudulent, it's the merchant that pays, so the merchant has a strong incentive to ask for more rather than less.
- WatchDog 13y agoMore than likely you dont need the name or cvv, sometimes not even the expiry.