A Novel Graphical Password Authentication Scheme with Improved Usability

Abstract

Pictures are remembered better than text by humans, motivated by the proposition that graphical authentication passwords are the possible alternatives for text-based passwords. The main objective of this study is to examine the usability attributes of the recognition-based graphical passwords, concerning ISO standard and general usability attributes. Then, the usability attributes and sub features were compared to get the new ones are considered and implemented in the novel proposed graphical password scheme. The proposed scheme was performed as a prototype and a usability evaluation towards the proposed scheme was conducted to measure its usability and practicality as the alternative user authentication scheme. Based on the questionnaire survey result and user's feedback concerning the whole system and the usability attributes of the proposed scheme, all the percentage of findings is described to be very good which from the usability point of view indicates that the new graphical password scheme is highly acceptable.