20130191908 | METHODS, DEVICES, AND SYSTEMS FOR UNOBTRUSIVE MOBILE DEVICE USER RECOGNITION - The present invention discloses methods, devices, and systems for unobtrusively recognizing a user of a mobile device. Methods including the steps of: unobtrusively collecting motion data from the mobile device during normal device usage by monitoring standard authorized-user interaction with the device, without any form of challenge or device-specified action; demarcating the motion data into user motion-sequences based on changes in a motion-state or an elapsed time-period without an occurrence of the changes, wherein the motion-state refers to a placement and speed of the mobile device at a point in time; calculating user motion-characteristics from the user motion-sequences; and generating a motion-repertoire from the user motion-characteristics, whereby the motion-repertoire enables unobtrusive recognition of the user. Preferably, the method further includes the step of: detecting unidentified motion-characteristics that are not associated with the motion-repertoire, thereby enabling unobtrusive recognition of unidentified usage. | 07-25-2013 |