Abstract
Traditional text password authentication is widely used to gain access to computing resources. Older users find the cognitive effort, and manual dexterity skills needed to use strong text passwords challenging. We designed and evaluated our Graphical Password system based on touchscreen selection of familiar facial images embedded randomly among unfamiliar, yet similar images. In our usability study, older users demonstrated a recall rate of 97%, password entropy superior to short PINs, and authentication time comparable to short text passwords.
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