Our fingerprints are quickly replacing PINs and passwordsas our primary means of unlocking our phones, doors and safes. They're convenient, unique, and ultimately more secure than easily guessed or forged passwords and signatures. So it makes sense that fingerprint sensors are coming to protect our credit and debit cards. Mastercardis testing out new fingerprint sensor-enabled payment cards that, combined with the onboard chips, offer a new, convenient way to authorize your in-person transactions. Instead of signing a paper receipt or entering your PIN while struggling to cover up the number pad, you simply place your thumb on your card to prove your identity.
The new cards are currently being tested in South Africa, and Mastercard hopes to roll them out to the rest of the world by the end of 2017. Even if that happens, though, you'll still have to wait for your bank or financial institution to get on board.
Once the technology is ready for the public, here's how it should work. Your bank will inform you that the biometric card is available, and if you're interested, you'll have to go to an enrollment center (most likely a bank) to get your fingers scanned. An encrypted digital template of your fingerprint is stored on the card's EMV chip. You can save up to two prints, but they would both have to be yours -- you can't authorize someone else to use your card with their fingers. After your templates are saved, your card is ready to be used at compatible terminals worldwide; merchants don't have to get new equipment to accept your fingerprint-enabled plastic.
The card itself is no thicker than a regular credit card. The fingerprint sensor is a small, thumbnail-sized rectangle that sits at the top right corner, and is easily accessible when you stick the card into a payment terminal.
During a recent demo, I tried to use a Mastercard rep's biometric card with my finger, and received a "Transaction denied" message from the test payment terminal. When the rep carried out the faux-purchase, the payment went through, and the machine began printing a receipt. What really surprised me was the speed at which it happened.
When the terminal asks you to insert the card, it's communicating to the bank information like your identity and the amount of the transaction. Then, it verifies your identity by asking for your fingerprint. The sensor reads your finger, and sends the information to the card's chip, which determines if you're the owner. If you are, it sends a "Yes" or "Authorized" message to the bank, which then allows the payment to pass.
During my demo, the authorization process happened almost instantly, which is reasonable given it's all happening on the card instead of going through the bank. When it was me using the card, however, it took a slight pause to register that I wasn't certified. I didn't have trouble learning the new process at all, either; it feels intuitive to simply leave your finger on the card as you slide it into a payment dock.
Of course, this method is only compatible with chip-and-pin cards, so it won't work with stores that only accept the older magnetic stripe models. But embedded chip technology has become increasingly popular in the US, thanks largely to regulations making financial institutions and merchants liable for breaches resulting from a lack of support for chip-and-pin cards. Getting a new biometric card is troublesome, since it would require a trip to the bank and a potentially long wait. But the convenience and the joy you'll get from waving that fancy new plastic in your friends' faces may make that agony worthwhile.
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