Security enhancement for touch panel based user authentication on smartphones

With the rapid spread of smartphones, user authentication for privacy protection is becoming increasingly important. Pattern lock is one of the most typical user authentication methods using a touch panel on smartphones. However, despite its high usability, it is vulnerable to shoulder surfing and smudge attacks. Therefore, to improve security of touch panel based user authentication on smartphones while maintaining usability, we propose a method that combines the function of pattern lock and handwritten biometrics and demonstrate its effectiveness through simulation experiments.