A Combination of username and password is most commonly used authentication technique. Graphical password facilitate memorability at the same time provide security against various attacks. In Graphical authentication user performs some events on pictures like clicking, dragging, moving mouse etc. Cued Click Point is one of the existing graphical authentication systems. This paper suggests an enhancement to click point based approach. In the proposed method click points will based on user perception of click points not on the basis of traditional technique like tolerance square . A perceptual hash function will be used for comparing click points made at registration time and login time. In the proposed method the click points will be compared based on the content of click points. This method provides more accuracy and security than any other methods available.

Graphical Password Authentication Graphical Authentication based on Perceptual hashing Cued Click Point Perception based CCP Picture Password Graphical User Authentication