METHOD AND APPARATUS FOR USER RECOGNITION EMPLOYING MOTION PASSWORDS

摘要

A method (300) and apparatus (120) are disclosed that authenticate a user of a mobile device (120) with motion sensors (210). During a learning session (500), the user initializes the mobile device (120) by providing (510) a motion sample. The mobile device (120) extracts (520) motion features that are unique to the user and converts (530, 550) them to parity bits (340) and to a password shadow (370). During a recognition session (300), a motion pattern is gathered (310) from the user moving the mobile device (120) as if it were a virtual pen. The mobile device (120) then uses the stored parity bits (340) to correct (330) small differences between motion patterns exhibited by the same user at different times. The mobile device (120) converts (350) the corrected motion pattern into a motion password that is compared (360) with the stored password shadow (370). A user is authenticated only if the two values coincide. The system erases (420) the generated motion password.