期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2014
卷号：61
期号：2
出版社：Journal of Theoretical and Applied
摘要：Computer systems employ user authentication as their primary means to protect system resources from unauthorised users and malicious attacks. Especially when multiple users share a set of systems and resources, effective authentication is very much required. Over the years, several authentication methods have been developed. The most commonly used method is the textual password based authentication. Users are required to choose a text comprising of alphabets, numbers and symbols. Once passwords are registered with the system, users need to recall and submit it each time of their login. Even though textual passwords are simple, they are vulnerable to many kinds of attacks. They are also cumbersome to be remembered. There are also biometric schemes that are based on user�s physical characteristics. They need expensive devices to implement. Recently images based graphical password schemes have received the attention of researchers. Human being�s ability to remember images is well established. So in this paper, a new graphical password scheme based on geographical maps is proposed. The proposed scheme has got three stages of authentication. Depending upon the level of security desired, users could opt for one or two or three stages. After the initial password creation, users could increase or decrease the number of stages at any time and they could also change the selected password in any particular stage. User studies were conducted on the proposed system to test its usability and memorability.
