Browsing by Author "Fidas, Christos A."
Now showing items 1-15 of 15
-
Article
Do human cognitive differences in information processing affect preference and performance of CAPTCHA?
Belk, Marios; Fidas, Christos A.; Germanakos, Panagiotis; Samaras, George S. (2015)A Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) is a widely used security defense mechanism that is utilized by service providers to determine whether the entity interacting with their ...
-
Conference Object
IHIP: Towards a user centric Individual Human Interaction Proof framework
Fidas, Christos A.; Hussmann, H.; Belk, Marios; Samaras, George S. (Association for Computing Machinery, 2015)A Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) is a widely used Human Interaction Proof mechanism to protect on-line services against automated software agents. Nowadays, there is a ...
-
Conference Object
Influences of users' cognitive strategies on graphical password composition
Katsini, Christina P.; Fidas, Christos A.; Belk, Marios; Avouris, Nikolaos M.; Samaras, George S. (Association for Computing Machinery, 2017)Recent research reveals interaction effects among human cognitive processing factors, interaction device types and user authentication schemes towards security of user created graphical keys. Aiming to investigate how ...
-
Article
The interplay between humans, technology and user authentication: A cognitive processing perspective
Belk, Marios; Fidas, Christos A.; Germanakos, Panagiotis; Samaras, George S. (2017)This paper investigates the interplay among human cognitive processing differences (field dependence vs. field independence), alternative interaction device types (desktop vs. touch) and user authentication schemes (textual ...
-
Article
On supporting security and privacy-preserving interaction through adaptive usable security
Belk, Marios; Fidas, Christos A.; Germanakos, Panagiotis; Samaras, George S. (2014)The purpose of this paper is to propose a preliminary framework for supporting usable security on the World Wide Web through adaptivity in user interface designs. In particular we elaborate the concept of "Adaptive Usable ...
-
Article
A personalization method based on human factors for improving usability of user authentication tasks
Belk, Marios; Germanakos, Panagiotis; Fidas, Christos A.; Samaras, George S. (2014)Aiming to ensure safety of operation to application providers and improve the usability of human computer interactions during authentication, this paper proposes a two-step personalization approach of user authentication ...
-
Article
A Personalized User Authentication Approach Based on Individual Differences in Information Processing
Belk, Marios; Fidas, Christos A.; Germanakos, Panagiotis; Samaras, George S. (2014)
-
Article
A personalized user authentication approach based on individual differences in information processing
Belk, Marios; Fidas, Christos A.; Germanakos, Panagiotis; Samaras, George S. (2015)An effective user authentication mechanism should embrace both security and usability aspects as its purpose is to ensure safety of operation of online services but as well usability and transparency to its end users. In ...
-
Conference Object
Security and usability in knowledge-based user authentication: A review
Katsini, Christina P.; Belk, Marios; Fidas, Christos A.; Avouris, Nikolaos M.; Samaras, George S. (Association for Computing Machinery, 2016)This paper presents a comprehensive review of state-of-the-art research works in knowledge-based user authentication, covering the security and usability aspects of the most prominent user authentication schemes
-
Article
Security for diversity: Studying the effects of verbal and imagery processes on user authentication mechanisms
Belk, Marios; Fidas, Christos A.; Germanakos, Panagiotis; Samaras, George S. (2013)Stimulated by a large number of different theories on human cognition, suggesting that individuals have different habitual approaches in retrieving, recalling, processing and storing verbal and graphical information, this ...
-
Article
Social Electricity: A case study on users perceptions in using green ICT social applications
Kamilaris, Andreas; Pitsillides, Andreas; Fidas, Christos A. (2016)Stimulated by a large number of socio-cognitive theories, suggesting that comparative feedback motivates people to adapt their behaviour according to commonly accepted behaviour and values, we developed Social Electricity, ...
-
Article
Studying the effect of human cognition on text and image recognition CAPTCHA mechanisms
Belk, Marios; Germanakos, Panagiotis; Fidas, Christos A.; Spanoudis, George; Samaras, George S. (2013)This paper investigates the effect of individual differences in human cognition on user performance in CAPTCHA tasks. In particular, a three-month ecological valid user study was conducted with a total of 107 participants ...
-
Article
Studying the effect of human cognition on user authentication tasks
Belk, Marios; Germanakos, Panagiotis; Fidas, Christos A.; Samaras, George S. (2013)This paper studies the effect of individual differences in human cognition on user performance in authentication tasks. In particular, a text-based password and a recognition-based graphical authentication mechanism were ...
-
Article
Towards the personalization of CAPTCHA mechanisms based on individual differences in cognitive processing
Belk, Marios; Germanakos, Panagiotis; Fidas, Christos A.; Holzinger, A.; Samaras, George S. (2013)This paper studies the effect of individual differences on user performance related to text-recognition CAPTCHA challenges. In particular, a text-recognition CAPTCHA mechanism was deployed in a three-month user study to ...
-
Conference Object
Using eye gaze data & visual activities to infer human cognitive styles: Method & feasibility studies
Raptis, George E.; Katsini, Christina P.; Avouris, Nikolaos M.; Belk, Marios; Fidas, Christos A.; Samaras, George S. (Association for Computing Machinery, Inc, 2017)Recent research provides evidence that individual differences in human cognitive styles affect user performance and experience in diverse application domains. However, state-of-The-Art elicitation methods of cognitive ...