Guest Editors' Introduction: Secure or Usable?
IEEE Security and Privacy
Authentication using graphical passwords: effects of tolerance and image choice
SOUPS '05 Proceedings of the 2005 symposium on Usable privacy and security
ACSAC '05 Proceedings of the 21st Annual Computer Security Applications Conference
On user choice in graphical password schemes
SSYM'04 Proceedings of the 13th conference on USENIX Security Symposium - Volume 13
The design and analysis of graphical passwords
SSYM'99 Proceedings of the 8th conference on USENIX Security Symposium - Volume 8
A second look at the usability of click-based graphical passwords
Proceedings of the 3rd symposium on Usable privacy and security
Modeling user choice in the PassPoints graphical password scheme
Proceedings of the 3rd symposium on Usable privacy and security
Human-seeded attacks and exploiting hot-spots in graphical passwords
SS'07 Proceedings of 16th USENIX Security Symposium on USENIX Security Symposium
Click Passwords Under Investigation
ESORICS '07 Proceedings of the 12th European symposium on Research In Computer Security
A hybrid recognition and recall based approach in graphical passwords
Proceedings of the 24th Australian Computer-Human Interaction Conference
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Click based graphical password systems, such as PassPoint [1], have received much attention in recent years. In this paper we describe our recent user studies on click based graphical passwords. Results from the user study showed a relationship among usability, security and the image choice for the graphical password. We further conducted an analysis on attacking methods for click based graphical passwords. The study highlights the vulnerability of click based graphical password, and enhances our understanding on the usability and security of graphical passwords. We also discuss a number of techniques to improve the usability and security of click based graphical password.