From what we can tell
using actual cash seems to be more rare these days, making way instead for plastic. Along with the increased use of plastic for online and bricks and mortar shopping though comes the increased risk of fraud. This is where the credit card pin pad
comes in to play.
Think of it as a more sophisticated version of entering the three digit security code that is included above the signature panel of your credit card. Enter your pin, a one time authorization code is generated for that transaction and the purchase is completed.