Abstract: The popularity of Smartphone is increasing day by day especially the one using android operating system. Since these devices contain increasing amount of personal information, it is important to have better security system. In this paper we try to see the different aspects that must be kept in mind while enforcing security in android Smartphone. We also discuss and compare the various authentication systems available and present a new improved authentication system that tries to remove the drawbacks present in the current authentication systems.
Keywords: Android, security, authentication lock screen, smart phone, color lock pattern.