Starting around 1999, a great many graphical password schemes have been proposed as
alternatives to text-based password authentication. We provide a comprehensive overview …

Individuals, businesses and governments undertake an ever-growing range of activities
online and via various Internet-enabled digital devices. Unfortunately, these activities …

Graphical passwords were proposed as an alternative to overcome the inherent limitations
of text-based passwords, inspired by research that shows that the graphical memory of …

Graphical password systems based upon the recall and reproduction of visual patterns (eg
as seen on the Google Android platform) are assumed to have desirable usability and …

Evaluating novel authentication systems is often costly and time-consuming. In this work, we
assess the suitability of using Virtual Reality (VR) to evaluate the usability and security of …

Nowadays, touchscreen mobile phones make up a larger and larger share in the mobile
market. Users also often use their mobile phones (eg, Android phones) to store personal …

This paper presents BoD Shapes, a novel authentication method for smartphones that uses
the back of the device for input. We argue that this increases the resistance to shoulder …

Authentication systems for public terminals and thus public spaces have to be fast, easy and
secure. Security is of utmost importance since the public setting allows manifold attacks from …

Pattern unlock is one of the entry protection mechanisms in Android system for unlocking the
screen. By connecting 4–9 dots in a 3× 3 grid, the user can set up an unlock pattern which is …

Two-factor authentication (2F) aims to enhance resilience of password-based authentication
by requiring users to provide an additional authentication factor, eg, a code generated by a …