A growing body of research explores emoji, which are visual symbols in computer mediated
communication (CMC). In the 20 years since the first set of emoji was released, research on …

In search of the silver bullet to solve the password problem, the field of knowledge-based
authentication has become bloated with novel proposals aiming to replace textual …

Given the difficulties of studying the shoulder surfing resistance of authentication systems in
a live setting, researchers often ask study participants to shoulder surf authentications by …

Mobile device authentication has been a highly active research topic for over 10 years, with
a vast range of methods proposed and analyzed. In related areas, such as secure channel …

My interest in emoji was inspired by my daughter. At the age of two or three, just as she was
about to start talking, she was already able to hold a phone, scroll and select emojis 1 to …

Recent industrial and academic research has focused on data-driven analytics with
smartphones by collecting user interaction, context, and device systems data through …

Contemporary personal mobile devices support a variety of authentication approaches,
featuring different levels of security and usability. With cameras embedded in smart glasses …

Smartphones have become indispensable in the life of many people. They are constant
companions, connections to the world, information sources, and substitutes for other devices …

Passwords still represent an annoying burden for millions of Internet users. Helping people
create memorable and secure credentials is therefore an important goal for web-service …

With a lot of personal information being stored in the smartphones nowadays, there is an
urgent need to protect them from unauthorised access. The first line of defense of a …