More usability-less security in touchscreen devices

The spread of usable, feature-rich, mobile devices capable of web browsing, emailing, and instant messaging, can unfortunately increase the chances of putting personal information at risk.
A study by DEI researchers, including Federico Maggi, Alberto
Volpatto
, Simone Gasparini (now with INRIA Grenoble), Giacomo
Boracchi
, and Stefano Zanero, has found that the increased usability of modern mobile devices can reduce the users' privacy. Their study has showed that, for example, modern touchscreen keyboards are more susceptible to shoulder surfing than traditional ones.
To demonstrate the existence of such privacy risk, they implemented a completely automated system that can perform shoulder surfing eight time faster than a human attacker.
For more information, please watch the demo videos of the prototype in action at [video] or read the attached technical report.