> If someone can compromise your "full hand scanner" or compromise the biometric database (which will inevitably happen), then you are compromised for life, since you cannot change your hand.
Suppose this happens. The world now knows all of your fingerprints. And at some point in the future you walk up to the desk of a datacenter where there's a security guard who phyiscally takes your hand, inspects it, and places it on the scanner. Can someone other than you pass this check?
Biometrics are a hard, mostly unsolved the problem, because the hard part is replacing the human security guard who verifies that you're scanning a real person's hand. For not super security sensitive applications TouchID, FaceID, and friends are good enough because most people aren't in Face Off or Mission Impossible.
Suppose this happens. The world now knows all of your fingerprints. And at some point in the future you walk up to the desk of a datacenter where there's a security guard who phyiscally takes your hand, inspects it, and places it on the scanner. Can someone other than you pass this check?
Biometrics are a hard, mostly unsolved the problem, because the hard part is replacing the human security guard who verifies that you're scanning a real person's hand. For not super security sensitive applications TouchID, FaceID, and friends are good enough because most people aren't in Face Off or Mission Impossible.