Security gaits

Work is underway to develop special shoe insoles for defining access to high security areas. The shoe insole idea comes from research that shows each of us actually have unique feet and unique ways of walking. Sensors in shoe insoles can check the pressure of feet, monitor gait, and use a microcomputer to compare the patterns to a master file for that individual. If the patterns match then access to an area is allowed, if they don't a wireless alarm message can be issued and access restricted. Three steps are apparently sufficient to delineate between most people. Having read that 123456 and password were the most common passwords of the recently hacked Yahoo accounts perhaps there is an opportunity for Mr Gates to introduce a security gate based on gaits?