International Journal of Computer Applications
Passcodes such as passwords, patterns etc. are the most popular way of implementing authorization in computer systems. Authorization is used for access control in computer systems. The amount of data being stored on mobile devices, particularly Android devices, is increasing rapidly. Using passcodes to lock applications solves this problem to some extent but, this only protects the data and does not provide any information about the intruder's identity. This paper explores existing technologies that can be used to store the identity of the intruder and inform the users about intrusion in real time.