The use of ubiquitous devices is increasing worldwide due to signs of progress in
sophisticated hardware technology with cutting-edge features. These features offer most …

The advancement in the computational capability and storage size of a modern mobile
device has evolved it into a multi-purpose smart device for individual and business needs …

Online handwritten analysis presents many applications in e-security, signature biometrics
being the most popular but not the only one. Handwriting analysis also has an important set …

Current mobile user authentication systems based on PIN codes, fingerprint, and face
recognition have several shortcomings. Such limitations have been addressed in the …

Mobile devices such as smartphones and smartwatches are part of our everyday life,
acquiring large amount of personal information that needs to be properly secured. Among …

Passwords are still used on a daily basis for all kind of applications. However, they are not
secure enough by themselves in many cases. This work enhances password scenarios …

The growing number of mobile devices over the past few years brings a large amount of
personal information, which needs to be properly protected. As a result, several mobile …

Over the past few years, there has been an exponential increase in the percentage of
people owning and using a smart phone. These devices have sensor-rich touchscreens that …

In this paper we list the sensors commonly available in modern smartphones and provide a
general outlook of the different ways these sensors can be used for modeling the interaction …

In this paper we study the suitability of a new generation of CAPTCHA methods based on
smartphone interactions. The heterogeneous flow of data generated during the interaction …