Brilliant. Password security needs to be improved on large screen mobile devices, it has to be easy to use and hard to crack. What if the touchscreen computer

Brilliant. Password security needs to be improved on large screen mobile devices, it has to be easy to use and hard to crack. What if the touchscreen computer took a short video of the user making a facial change, like smiling and showing the teeth. The algorithm would take hundreds of short videos (during usage of the product), and learn what it's user looks like to a very high degree over time (hair changes, skin colors, etc). So an attacker would have to acquire a high definition video of the person showing the teeth. If the user only performed the maneuver for the device, then it would be hard for the attacker to reproduce it. It's not perfect, but it would be superior to tapping a 6 digit code that anybody can see from 20 feet away.