BIOMETRICMETHOD USING WEARABLE DEVICE AND PORTALBE DEVICE

摘要

A wearable device comprises: a communication module wirelessly communicating with a first external device; a motion sensor sensing a user motion; and a control unit. A first motion data, generated by a user motion, is collected and transmitted to a first external device. First and second security level data are received from the first external device. When a state of the wearable device is changed from a wearing state to a non-wearing state, only the first is received from the first external device. The purpose of the present invention is to provide a wearable device capable of authenticating a user without an additional circuit or a user′s additional operation.