Since the dawn of writing 5000 years ago, handwritten signatures have been used as a means of fraud prevention. Signed credit card receipts are still one of the primary ways we verify identity and authorize purchases. But in today’s technological landscape, signatures are rapidly being replaced with innovations like fingerprint scans and Facebook authentication. We recently learned that Amazon has filed for a patent that would allow users to take a selfie as a way to validate their indentity in payments. We really enjoyed this article from the Verge, where James Vincent reveals Mastercard’s plans to develop heartbean scans in leui of passwords.