Keystroke Analysis for Thumb-based Keyboards on Mobile Devices. - Sevasti Karatzouni; Nathan L. Clarke (SEC, 2007)

Flexible and Transparent User Authentication for Mobile Devices. - Nathan L. Clarke; Sevasti Karatzouni; Steven Furnell (SEC, 2009)

Non-intrusive continuous user authentication for mobile devices. - Sevasti Karatzouni (2014)