International Journal of Engineering and Technology

The most common computer authentication method is to use alphanumerical usernames and passwords. Textual passwords are difficult to memorize often leads their owners to write them down on papers or even save them in a computer file. Graphical authentication has been proposed as a possible alternative solution to text-based authentication, motivated particularly by the fact that humans can remember images better than text. In this paper, we present an innovative, user-friendly, recall-based graphical password scheme where the user starts with the identifying the symbol from 5 × 5 grid formed using 25 blocks. The user is supposed to select three characters one by one by clicking on a single block from the 5 × 5 grid in such a way that the password contains at least one character from each set of four characters depicted on the symbol of the clicked block. The user chooses the characters of the password in the same order per each login attempt. The user is supposed to select the position of the each character depicted on the symbol of the clicked block from the 2 × 2 grid. The login attempt is successful after matching the characters of the password at positions one, two and three respectively. Login is invalid, if characters of password are not identified in the symbols of 5 × 5 grid or not matched with the corresponding positions of 2 × 2 grid.