Items where Author is "Ullah, Abrar"

Item Type No Grouping

A Study into the Usability and Security Implications of Text and Image Based Challenge Questions in the Context of Online Examination. (2019) Abrar Ullah, Hannan Xiao and Trevor Barker

A Dynamic Profile Questions Approach to Mitigate Impersonation in Online Examinations. (2018) Abrar Ullah, Hannan Xiao and Trevor Barker

Security and Usability of Authentication by Challenge Questions in Online Examination. (2017) Abrar Ullah

A Classification of Threats to Remote Online Examinations. (2016) Abrar Ullah, Hannan Xiao and Trevor Barker

Usability of activity-based and image-based challenge questions in online student authentication. (2015) Abrar Ullah, Hannan Xiao and Trevor Barker

Privacy and Usability of Image and Text Based Challenge Questions Authentication in Online Examination. (2014) Abrar Ullah, Hannan Xiao, Mariana Lilley and Trevor Barker

Evaluating Security and Usability of Profile Based Challenge Questions Authentication in Online Examinations. (2014) Abrar Ullah, Hannan Xiao, Trevor Barker and Mariana Lilley

Design, Privacy and Authentication of Challenge Questions in Online Examinations. (2013) Abrar Ullah, Hannan Xiao, Mariana Lilley and Trevor Barker

Using Challenge Questions for Student Authentication in Online Examination. (2012) Abrar Ullah, Hannan Xiao, Mariana Lilley and Trevor Barker

Profile Based Student Authentication in Online Examination. (2012) Abrar Ullah, Hannan Xiao and Mariana Lilley