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 …

We evaluate two decades of proposals to replace text passwords for general-purpose user
authentication on the web using a broad set of twenty-five usability, deployability and …

The ever-increasing volumes of social knowledge shared in online social networks, the
establishment of trustworthy social relationships over these platforms, and the emergence of …

We report the results of the first large-scale empirical analysis of password implementations
deployed on the Internet. Our study included 150 websites which offer free user accounts for …

We scoped, designed, produced, and evaluated the effectiveness of a recreational tabletop
card game created to raise awareness of and alter perceptions regarding-computer security …

Se expone una breve evolución histórica de los servicios de redes sociales que han surgido
en internet bajo el concepto de web social, incidiendo en los ejemplos más significativos de …

The underlying issues relating to the usability and security of multiple passwords are largely
unexplored. However, we know that people generally have difficulty remembering multiple …

(57) ABSTRACT A social CAPTCHA is presented to authenticate a member of the social
network. The social CAPTCHA includes one or more challenge questions based on …

US8346217B2 - Systems, methods and apparatus for controlling access to mobile devices -
Google Patents US8346217B2 - Systems, methods and apparatus for controlling access to mobile …

All four of the most popular webmail providers-AOL, Google, Microsoft, and Yahoo!-rely on
personal questions as the secondary authentication secrets used to reset account …