The Need

 
The explosive growth of smartphone use worldwide introduces a new set of privacy challenges. Smartphones store sensitive information from multiple applications and provide access to sensitive network services. The need to provide secure authentication of a device’s owner to his smartphone is clear and strong.
 
Existing authentication alternatives are too obtrusive. Mobile devices are typically accessed multiple times daily, and require spontaneous and immediate access. The obtrusive nature of current authentication techniques impedes their adoption on smartphones, forcing users to forgo security in favor of usability.