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Graphical passwords have been proposed to address known problems with traditional text passwords. For example, memorable user-chosen text passwords are predictable, but random system-assigned passwords are difficult to remember. The authors explore the usability effects of modifying system parameters to increase the security of a cued-recall, click-based graphical password system. In this system, users create passwords consisting of one click per image on a click-dependent sequence of images. Generally, usability tests for graphical passwords have used configurations resulting in password spaces smaller than that of common text pass-words.
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