Korey Johnson (User Centric) will present a paper written by himself and co-author, Steffen Werner (University of Idaho) on the usability of user authentication mechanisms at the 52nd Annual Meeting of the Human Factors and Ergonomics Society (HFES). Previous studies (Johnson & Werner, 2006; 2007) have shown that Composite Scene Authentication (CSA) passcodes are more memorable than alphanumeric passwords over extended retention intervals. This study evaluated the memorability of six types of graphical passcodes of varying complexity (including three variants of CSA passcodes) over thirty-minute and one-week retention intervals
Korey's background is in research design, methodology, and analysis. He is particularly interested in the usability of user authentication mechanisms, and is the co-inventor of a patent-pending graphical user authentication mechanism. Prior to joining the company, Korey was an intern for the Human-Machine Interaction (HMI) team of DaimlerChrysler Research and Technology North America where he evaluated driver distraction, navigation systems, and icon design. With User Centric, Korey has worked with clients in a variety of industries on projects related to medical packaging, mobile device UI, IVR design, and website / web application UI design. He has experience conducting and analyzing summative usability tests as well as focus groups and tests of a more qualitative nature. Korey is an active member of HFES and has published and presented several papers at HFES conferences.