Spotted: graphical passwords for mobiles

// published on Human Computer Interaction with Mobile Devices and Services-Latest Proceeding Volume // visit site

Improving user authentication on mobile devices: a touchscreen graphical password
Hsin-Yi Chiang, Sonia Chiasson

Typing text passwords is challenging when using touchscreens on mobile devices and this is becoming more problematic as mobile usage increases. We designed a new graphical password scheme called Touchscreen Multi-layered Drawing (TMD) specifically for use with touchscreens. We conducted an exploratory user study of three existing graphical passwords on smart phones and tablets with 31 users. From this, we set our design goals for TMD to include addressing input accuracy issues without having to memorize images, while maintaining an appropriately secure password space. Design features include warp cells which allow TMD users to continuously draw their passwords across multiple layers in order to create more complex passwords than normally possible on a small screen.