Modern Credit Card Technology Explained

Credit cards aren't actually made of plastic anymore. Most modern cards are constructed

from a combination of PVC and metals like copper or aluminum. These metals make your card tap to

pay work through something called RFID technology. The chip in your card can store over

one hundred times more information than the old magnetic stripe. That black stripe

on the back could only hold about sixty characters of data. Your card's expiration

date isn't random either. Banks intentionally set them to expire so they can send

you updated security features every few years.