| Summary: | 碩士 === 國立中央大學 === 資訊工程研究所 === 99 === Recently, the smartphone has become a widely used handheld device for entertainments and commercial activities in daily life. However, currently, the smartphone has no transparent and continuous authentication mechanisms to improve the security level especially on commercial applications. In this paper, a non-intrusive and continuous approach for authenticating the smartphone user is proposed. The proposed approach uses the orientation sensor, which is a built-in device of a smartphone, to perceive the way of a user for holding the smartphone for biometrics. To test the proposed approach, we have developed an application that emulates two general functions of a smartphone, namely, the address book and the gallery, to collect orientation-sensor-based biometrics. The experiment results show that the proposed approach has a successful verification rate about 30% and a false acceptance rate over 25%. Therefore, the orientation-sensor-based feature may be used as a part for user verification.
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