Ask HN: Why are my CVV numbers the same?

2 ポイント投稿者 rfjedwards10 年前3 コメント

I have two Mastercards, with two different card numbers and expiry dates, issued at different times, from different institutions, with different variations of my name on each.

The CVV numbers on them are exactly the same.

Is it a one-in-999 coincidence?

Or is this exposing an exploitable weakness in however the CVVs are generated?

3 コメント

ocdtrekkie10 年前

I suspect it's a coincidence. I've never had two cards with the same CVV.

PaulHoule10 年前

I had one which was 000.

dataentryagency10 年前

Its just a coincidence.