CS Colloquium Series @ UCY

Department of Computer Science - University of Cyprus

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Colloquium Coordinator: Demetris Zeinalipour

Colloquium: Human Cognition, Visual Behavior and Security in Graphical User Authentication: Case Studies and Interaction Effects, Dr. Christos A. Fidas (University of Cyprus, Cyprus), Thursday, April 19, 2018, 11:00-12:00 EET.

The Department of Computer Science at the University of Cyprus cordially invites you to the Colloquium entitled:

Human Cognition, Visual Behavior and Security in Graphical User Authentication: Case Studies and Interaction Effects


Speaker: Dr. Christos A. Fidas
Affiliation: University of Cyprus, Cyprus
Category: Colloquium
Location: Room 148, Faculty of Pure and Applied Sciences (FST-01), 1 University Avenue, 2109 Nicosia, Cyprus (directions)
Date: Thursday, April 19, 2018
Time: 11:00-12:00 EET
Host: Prof. George Samaras (cssamara-AT-cs.ucy.ac.cy)
URL: https://www.cs.ucy.ac.cy/colloquium/index.php#cs.ucy.2018.fidas

Graphical password schemes, which require users to sketch a secret pattern on a background image or select images on a grid, are constantly gaining market share as they scaffold natural human-computer interaction and adapt easier to nowadays mobile and immersive user interaction realms. However, studies revealed that people make predictable choices when using graphical passwords, introducing vulnerabilities to systems and services. Bearing in mind that a graphical password activity is processed on a cognitive level that entails visual attention, search, processing and comprehension, our recent research efforts are focused on building human cognition-centered graphical password schemes that can adapt to the unique cognitive and visual processing characteristics of users, aiming to improve security. In this talk, we will present and discuss results of three recent case studies within this research endeavor: a) we have initially investigated the influences of human cognition and visual behavior on password strength during graphical password composition which revealed that users with different cognitive styles followed different patterns of visual behavior which affected the strength of the created passwords; b) motivated by these findings, we have built and tested intelligent cognition-based predictive user models that are able to infer the users' cognitive processing characteristics within a few seconds by analyzing in real-time the users' eye-gaze metrics during graphical password composition; and c) we suggested and evaluated a two-step method for estimating the strength of user-created graphical passwords based on the users' eye-gaze behavior during password creation which allows unobtrusive prediction of password strength and hence enables intervention to the password composition for helping users to create stronger passwords.

Short Bio:
Dr. Christos A. Fidas is currently an Assistant Professor in the Department of Cultural Heritage Management and New Technologies, University of Patras, and a Research Associate at the HCI Group of the Interactive Systems Laboratory, University of Patras. He received a PhD from the Electrical and Computer Engineering Department, University of Patras. His research is related with investigating the influence of human aspects in cultural heritage informatics and usable and secure information systems aiming to drive the design and development of bootstrapped solutions to the unique cultural and cognitive characteristics of the end-users. In this context, he has published papers in accredited academic journals and conferences, and patents, including a best paper award, and a best paper award nomination and honorable mention. He has also extensive professional experience in projects and human resource management in several EU-funded and National research projects. See more: http://www.cfidas.info

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