Security enhancement in automated teller machine

Security is provided to grant access to a legal user and to prevent the system from an illegal person. Password authentication in public space often poses the problem of disclosure either through spywares like key loggers installed on target machine or a malicious onlooker who observes while the person enters the password. Virtual keyboards provide protection against key loggers but fail to avoid shoulder-surfing. In this proposed system it is planned to improvise these keyboards by changing the layout to frustrate the hackers. When the person enters his PIN in the touch screen, immediately the arrangement of the numbers in the screen will be changed from its original position. The person entering next wouldn't have the same arrangement of numbers in the touch screen. Even when the shoulder-Surfer observes the movement of the person entering the PIN number they can't able to hack the password. By using Arduino IDE compiler with Arduino it is efficiently possible to avoid Shoulder-Surfing attacks.