Cued-Recall Graphical Passwords
Cued-Recall PasswordsCued-Recall based graphical password schemes are systems where the user is provided with a visual cue to aid them in remembering the password. The most extensively studied cued-recall based password scheme is PassPoints. The user is required to select five points on the image to comprise their password. During authentication the user is required to re-enter these points. An important consideration in the implementation of PassPoints is the type of discretization that will be used. This is important as it determines the range in which a click point would be acceptable for the password.
Several improvements to PassPoints have been proposed and implemented. One of these systems is Cued-Click Points. This system makes use of different images for each of the five required click points. As a result the system is more robust than PassPoints.