Usable privacy and security researchers have developed a variety of approaches to
represent risk to research participants. To understand how these approaches are used and …

A large proportion of dryland trees and shrubs (hereafter referred to collectively as trees)
grow in isolation, without canopy closure. These non-forest trees have a crucial role in …

Adaptive Authentication allows a system to dynamically select the best mechanism (s) for
authenticating a user depending on contextual factors, such as location, proximity to …

Cybersecurity has gained prominence, with a number of widely publicised security incidents,
hacking attacks and data breaches reaching the news over the last few years. The …

We review HCI history from both the perspective of its 1980s split with human factors and its
nature as a discipline. We then revisit human augmentation as an alternative to user …

Nudging is a promising approach, in terms of influencing people to make advisable choices
in a range of domains, including cybersecurity. However, the processes underlying the …

Passwords are still a mainstay of various security systems, as well as the cause of many
usability issues. For end-users, many of these issues have been studied extensively …

Attackers increasingly use passwords leaked from one website to compromise associated
accounts on other websites. Such targeted attacks work because users reuse, or pick …

Password authentication is still ubiquitous although alternatives have been developed to
overcome its shortcomings such as high cognitive load for users. Using an objective rating …

Password strength meters are an important tool to help users choose secure passwords.
Strength meters can only then provide reasonable guidance when they are accurate, ie …