A movable-vehicle security system includes a facial-recognition system including a scanner such as a television or infrared camera directed at the face of a person in the driver's seat, which system produces output control signals that are applied to enable or disable operation of the vehicle, with or...http://www.google.de/patents/US20030142849?utm_source=gb-gplus-sharePatent US20030142849 - Vehicle security systems and methods employing facial recognition using a reflected image
