In the near future, you may not need to touch a keypad to select a tip or pay for large purchases. All it may take is a swipe, tap or other quick gesture.

NFCGest lets credit cards unlock terminals with gesture passcodes—adding security without extra hardware or PIN codes.

Even if you use a fingerprint or Face Unlock to secure your Android phone, neither of those methods can be used as the "main" security method. For example, when you restart your phone, it will require ...