Browsing by Author "Fidas, Christos"
Now showing items 1-7 of 7
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Eye Gaze-driven Prediction of Cognitive Differences during Graphical Password Composition
Katsini, Christina; Fidas, Christos; Raptis, George E.; Belk, Marios; Samaras, George; Avouris, Nikolaos (Association for Computing Machinery, 2018)Evidence suggests that individual cognitive differences affect users' memorability, visual behavior, and graphical passwords' security. Such knowledge denotes the added value of personalizing graphical password schemes ...
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FlexPass: Symbiosis of Seamless User Authentication Schemes in IoT
Belk, Marios; Fidas, Christos; Pitsillides, Andreas (Association for Computing Machinery, 2019)This paper presents a new user authentication paradigm which is based on a flexible user authentication method, namely FlexPass. FlexPass relies on a single, user-selected secret that can be reflected in both textual and ...
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“I Recall this Picture”: Understanding Picture Password Selections based on Users’ Sociocultural Experiences
Constantinides, Argyris; Fidas, Christos; Belk, Marios; Pitsillides, Andreas (2019)Graphical passwords leverage the picture superiority effect to enhance memorability, and reflect today's haptic user interaction realms. Image content related to users' past sociocultural experiences assists users with the ...
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Influences of Human Cognition and Visual Behavior on Password Strength during Picture Password Composition
Katsini, Christina; Fidas, Christos; Raptis, George E.; Belk, Marios; Samaras, George; Avouris, Nikolaos (Association for Computing Machinery, 2018)Visual attention, search, processing and comprehension are important cognitive tasks during a graphical password composition activity. Aiming to shed light on whether individual differences on visual behavior affect the ...
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On the Accuracy of Eye Gaze-driven Classifiers for Predicting Image Content Familiarity in Graphical Passwords
Constantinides, Argyris; Belk, Marios; Fidas, Christos; Pitsillides, Andreas (Association for Computing Machinery, 2019)Graphical passwords leverage the picture superiority effect to enhance memorability, and reflect today's haptic users' interaction realms. Images related to users' past sociocultural experiences (e.g., retrospective) enable ...
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On the Personalization of Image Content in Graphical Passwords based on Users' Sociocultural Experiences: New Challenges and Opportunities
Constantinides, Argyris; Fidas, Christos; Belk, Marios; Pitsillides, Andreas (Association for Computing Machinery, 2019)Recent works underpin the added value of considering users' past sociocultural experiences as a personalization factor for the image content used within graphical password schemes, since it has a positive impact on the ...
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Picture Passwords in Mixed Reality: Implementation and Evaluation
Hadjidemetriou, George; Belk, Marios; Fidas, Christos; Pitsillides, Andreas (Association for Computing Machinery, 2019)We present HoloPass, a mixed reality application for the HoloLens wearable device, which allows users to perform user authentication tasks through gesture-based interaction. In particular, this paper reports the implementation ...