we have used Illusion PIN(IPIN) to solve the problems regarding shoulder_surfing attacks on authentication schemes.PIN -based authentication are practically used on touch screen devices. PIN works on the principle technique of hybrid images.The hybrid images are been merged to keypads. These keypads are ordered to different digits.Thus,making the user to see the device and enter the password whereas the attacker would see another password as the attacker is not as close as the user.The keypads are been shuffled to avoid further attacks,if the attacker is able to remember the position of the keypads.To increase the reliability and security of illusion pin,we worked on algorithm based on human visual perception and calculatimg the minimum distance from attacker and the user.We evaluated our calculations with 84 simulated shoulder-surfing attacks that were obtained from 21 different people.All of the 84 attacks were unsuccessful and we evaluated the minimum distance that a camera cannot capture the necessary data from use’s keypad.. According to our analysis,surveillance camera were not able to capture the PIN of a touchscreen user when Illusion PIN is used.

PIN, touch creen devices, Analysis surveillance

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