Security Analyst – Jeff Soehner CISSP, GXPN,GPYC,GMOB,GCIH

In this article and the accompanying white paper, the details that hackers use to take a skimmed or stolen credit card number and work backwards are revealed. They start to figure out your expiry first and then your postal code, CV code and finally your billing address to make purchases as you.

Mastercard holders are winners here because the verification system they use is not vulnerable but visa card holders beware.

Fortunately for card holders, they are indemnified against fraudulent purchases but if you only have one card you may be stuck waiting for a replacement.

https://www.schneier.com/blog/archives/2016/12/guessing_credit.html