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    Influencing Users Towards Better Passwords: Persuasive Cued Click-Points

    People and Computers XXII
    Culture, Creativity, Interaction

    Proceedings of HCI 2008
    The 22nd British HCI Group Annual Conference
    Liverpool John Moores University, UK

    1 - 5 September 2008

    AUTHORS

    Sonia Chiasson, Alain Forget, Robert Biddle & P.C. van Oorschot

    ABSTRACT

    Usable security has unique usability challenges because the need for security often means that standard human-computerinteraction approaches cannot be directly applied. An important usability goal for authentication systems is to support users in selecting better passwords, thus increasing security by expanding the effective password space. In click-based graphical passwords, poorly chosen passwords lead to the emergence of hotspots - portions of the image where users are more likely to select click-points, allowing attackers to mount more successful dictionary attacks. We use persuasion to influence user choice in click-based graphical passwords, encouraging users to select more random, and hence more secure, click-points. Our approach is to introduce persuasion to the Cued Click-Points graphical password scheme (Chiasson, van Oorschot, Biddle, 2007). Our resulting scheme significantly reduces hotspots while still maintaining its usability.

    PAPER FORMATS

    PDF filePDF Version of this Paper (380kb)

    HCI 2008: People and Computers XXII Culture, Creativity, Interaction (cover)

    Print copies of People and Computers XXII Culture, Creativity, Interaction (Vol. 1)
    ISBN 978-1-906124-04-5
    RRP £85

    Available from the BCS bookshop

    People and Computers XXII Culture, Creativity, Interaction (Vol. 2)
    ISBN 978-1-906124-06-9
    RRP £85

    Available from the BCS bookshop