undefined | Better HN

0 pointsmalfist2y ago0 comments

The first four are not secrets. The first two digits identify the card issuer, and the next two are the card type. That's how those credit card numbers can show you your card issuer's logo after you type the first two characters.

0 comments

lights01232y ago

Right—they're saying it would be easy for a scammer to "prove legitimacy" by showing those first four, given that they're public.

j / k navigate · click thread line to collapse

0 pointsmalfist2y ago0 comments

The first four are not secrets. The first two digits identify the card issuer, and the next two are the card type. That's how those credit card numbers can show you your card issuer's logo after you type the first two characters.

0 comments

lights01232y ago

Right—they're saying it would be easy for a scammer to "prove legitimacy" by showing those first four, given that they're public.

j / k navigate · click thread line to collapse