We may earn a commission from links on this page.Biometric authentication (i.e., face or fingerprint scans) is awesome. It's convenient, as it's often faster to scan your face than to punch in a code, and secure, since you can't "guess" someone's fingerprint. In most cases, the move from PIN-only to biometric as the default was a win-win for everyone. However, it's not perfect. Biometric authentication is secure in the event someone runs off wit…