Complexity Metrics and User Strength Perceptions of the Pattern-Lock Graphical Authentication Method
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- Andriotis P., Tryfonas T., Oikonomou G. (2014) Complexity Metrics and User Strength Perceptions of the Pattern-Lock Graphical Authentication Method. In: Tryfonas T., Askoxylakis I. (eds) Human Aspects of Information Security, Privacy, and Trust. HAS 2014. Lecture Notes in Computer Science, vol 8533. Springer, Cham
One of the most popular contemporary graphical password approaches is the Pattern-Lock authentication mechanism that comes integrated with the Android mobile operating system. In this paper we investigate the impact of password strength meters on the selection of a perceivably secure pattern. We first define a suitable metric to measure pattern strength, taking into account the constraints imposed by the Pattern-Lock mechanism’s design. We then implement an app via which we conduct a survey for Android users, retaining demographic information of responders and their perceptions on what constitutes a pattern complex enough to be secure. Subsequently, we display a pattern strength meter to the participant and investigate whether this additional prompt influences the user to change their pattern to a more effective and complex one. We also investigate potential correlations between our findings and results of a previous pilot study in order to detect any significant biases on setting a Pattern-Lock.
KeywordsSecurity Android password bias usability feedback
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