I believe this is one reason that credit card companies haven't moved to two-factor authentication for credit card transactions. In my opinion, every credit ca

I believe this is one reason that credit card companies haven't moved to two-factor authentication for credit card transactions. In my opinion, every credit card should have an e-paper tag on it with a 6 digit code that changes once every 10 minutes or so (to reduce power requirements). Code should be required for all in person and online transactions. However, since they make money off fraud, they have no incentive to reduce it.