出版社：University of Malaya * Faculty of Computer Science and Information Technology
摘要：Picturebased password has been proposed as an alternative authentication method to replace textbased password. Ensuring the security of picturebased password is not a simple task as picturebased objects are a lot easier to access and remember and can thus be easily guessed. In particular, shoulder surfing attack still remains as the main security threat encountered by many picturebased password authentication schemes, especially in drawmetric authentication scheme. In this paper, a novel shoulder surfing resistance mechanism has been proposed and evaluated. The proposed mechanism utilises penup event and neighbouring connectivity manipulation into a revised Background PassGo scheme. From the evaluation result, it has proven that the proposed mechanism achieves better results in resisting shoulder surfing attack while, at the same time, allowing a larger password space.
