The most important kind of authentication used is PIN authentication which is simple, effective and usable, but this kind of authentication sometimes becomes prone to an attack known as shoulder surfing. Shoulder surfing refers to a direct observation, such as looking over a person's shoulder to obtain information. The previous work was done with the visibility of the PIN, but here we propose an innovative way to authenticate user by providing PIN to the system which won't be visible to an

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... ker but will be known to the actual user who is drawing it on a touch screen device.