This paper presents an integrated evaluation of the Persuasive Cued Click-Points graphical password scheme, including usability and security evaluations, and implementation considerations. An important usability goal for knowledge-based authentication systems is to support users in selecting passwords of higher security, in the sense of being from an expanded effective security space. We use persuasion to influence user choice in click-based graphical passwords, encouraging users to select more random, and hence more difficult to guess, click-points.

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Keywords Authentication, empirical studies, graphical passwords, usable security
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Journal IEEE Transactions on Dependable and Secure Computing
Chiasson, S, Stobert, E. (Elizabeth), Forget, A. (Alain), Biddle, R, & Van Oorschot, P. (2012). Persuasive cued click-points: Design, implementation, and evaluation of a knowledge-based authentication mechanism. IEEE Transactions on Dependable and Secure Computing, 9(2), 222–235. doi:10.1109/TDSC.2011.55