Graphical Passwords Authentication: A Survey?

In typically text-based passwords, well known users often create memorable passwords that are easy for attackers to guess, but strong system-assigned passwords are difficult for users to remember. Reusing same or easy passwords across different accounts help to memorability, but decrease in security. Text passwords are the most popular user authentication method, but have security and usability problems. Alternatives such as biometric systems and tokens have their own drawbacks Graphical passwords offer another alternative. This paper conducts a comprehensive survey of the existing graphical password techniques also classifies these techniques into three categories: recall, recognition, and cued-recall approaches. This paper discusses security and usability aspects of graphical password techniques and point out the future research directions in this area.