Our fingerprints are quickly replacing PINs and passwords as 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. MasterCard is 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.

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