Graphical Password based Authentication System

Abstract: Most of the existing authentication system has certain drawbacks for that reason graphical passwords are most preferable authentication system where users click on images to authenticate themselves. Access to computer systems is most often based on the use of alphanumeric passwords. However, users have difficulty remembering a password that is long and random-appearing. Instead, they create short, simple, and insecure passwords. Graphical passwords have been designed to try to make passwords more memorable and easier for people to use and, therefore, more secure. Using a graphical password, users click on images rather than type alphanumeric characters. We have designed a new and more secure graphical password system, called gSign. An important usability goal of an authentication system is to support users for selecting the better password. User creates memorable password which is easy to guess by an attacker and strong system assigned passwords are difficult to memorize. So researchers of modern days have gone through different alternative methods and concluded that graphical passwords are most preferable authentication system. The proposed system combines the existing cued click point technique with the persuasive feature to influence user choice along with image steganography techniques, encouraging user to select more random click point which is difficult to guess. Image steganography, the art of hiding data within an image is used to improve the security of the authentication system. Textual passwords are stored within the images using the steganography techniques.

Keywords: Graphical password, Steganography, Image steganography.