MasterCard announced on Thursday that it's looking to add a layer of biometric security to its credit cards and all user will need to do is simply take a selfie. The system will create a digitized map of your face, convert that map into a hash and compare it to the hash stored on Mastercard's servers. Users will be able to pay through a mobile app with either their fingerprints or by staring into the device and blinking once. The blink is used to prevent someone from just holding up a picture of you to spoof the system. What's more, "They're storing an algorithm, not a picture of you," Phillip Dunkelberger, who runs Nok Nok Labs, told CNN Money. "And I'm sure they're doing the appropriate stuff to guard it."