Graphical Password Scheme Based on Color Hint Approach

Generally, textual password is the most used kind of authentication technique. However, this authentication type is vulnerable to a lot of attacks. Users using this kind of authentication techniques are at the risk of exposing vital organizational data or even password to attacks such as phishing, shoulder surfing, brute force and dictionary attacks etc. This is the major reason why a new authentication type is required, in other to minimize these threats or attacks, graphical authentication techniques were developed. But this authentication also faces attacks such as shoulder surfing and guessing attacks etc. In this paper, a graphical password scheme based on color hint approach has been developed and analyzed. The scheme authenticates users in two different ways which are: using an image to select different password click points and using secret color hint and transparent shapes as a way for the user to know the position of the click points after it had been reshuffled on the selected image. The project will be limited to the reliability, efficiency, ease of use and friendliness of graphical user interface during the user authentication. The system has been able to minimize or reduce the problem of shoulder surfing and guessing attacks.