researchers at yahoo labs in california have created a sensor that can recognise the unique shape of your ear , your palm or any other body part you want to access your device .
called bodyprint , the technology turns a standard touchscreen into a biometric scanner removing the need to specialist hardware such as fingerprint readers or infrared cameras .
bodyprint was devised by christian holz , senaka buthpitiya , and marius knaust from the california-based yahoo labs .