I am an Assistant Professor at the Electrical and Computer Engineering Department, University of Patras, from which I also received a PhD and BSc. My research is related to the design and evaluation of information systems.
Published papers in top-ranked scientific venues, which received awards, and (co-) supervised Ph.D. and M.Sc. students. Long-standing professional experience as a project coordinator and principal investigator in EU-funded and National research projects. Fluent in German, English and Greek.Email: fidas AT upatras.gr :: LinkedIn Profile: https://www.linkedin.com/in/fidas
[New Research Project - July 2021]
Excited to receive a research grant of €194,295.00, from the
Hellenic Foundation for Research and Innovation (H.F.R.I.),
to Support Faculty Members & Researchers in the field of Engineering Sciences and Technology.
[New Publications - June 2021] Happy about our three new paper publication at the 18th IFIP TC.13 International Conference on Human-Computer Interaction (INTERACT 2021), entitled "A Field Dependence-Independence Perspective on Eye Gaze Behavior within Affective Activities", "An Empirical Study of Picture Password Composition on Smartwatches" and "Understanding Insider Attacks in Personalized Picture Password Schemes".
[New EU Project - March 2021] I am honored to act as a Project Coordinator and Principal Investigator of the EU project TRUSTID that has been approved by the European Commission with a total funding of €291,310. The proposal was submitted in collaboration with the University of Cyprus (Cyprus), the Institute of Systems and Robotics - University of Coimbra (Portugal) and Cognitive UX GmbH (Germany).
[New Lab Member - March 2021] I would like to welcome Mrs. Kyriaki Konstantina (MSc) to our lab (Interactive Technologies - HCI Group) who started her PhD studies on building an Eye Gaze and Electroencephalography Driven Framework for Human Memory Modeling.
[Workshop at ACM UMAP 2021 - January 2021] I am looking forward to running the 3rd edition of our workshop APPS 2021 - Adaptive and Personalized Privacy and Security, in conjunction with ACM UMAP 2021. Our special focus in 2021 will be on challenges and opportunities related to the Covid-19 outbreak on ensuring security and privacy of sensitive data and secure user interactions in online systems such as challenges for online distance learning, the need for touchless authentication, e-Government, e-Commerce, etc.
[New Publication - January 2021] Our paper entitled "From hot-spots towards experience-spots: Leveraging on users’ sociocultural experiences to enhance security in cued-recall graphical authentication" has been accepted at the International Journal of Human-Computer Studies.
[New Position - November 2020] I am thankful for spending the last years at the Department of Cutlural Heritage Management and New Technologies of the University of Patras. Many thanks to all my colleagues and supporting staff for a fruitful and joyful collaboration. I am very happy to join the Electrical and Computer Engineering Department of the University of Patras. I look forward to work with my new colleagues and students.
[Guest Editor of Special Issue - November 2020] I am the Guest Editor, together with Dr. Stella Sylaiou and Dr. George Pavlidis, of the Special Issue "Mixed Reality in Culture and Heritage" at the Heritage Journal. Please download the Call for Papers (.pdf)
[Best Paper Award - October 2020] We received the prestigious UMUAI James Chen award for best paper of 2019, for our paper entitled "A cognition-centered personalization framework for cultural heritage content". The User Modeling and User Adapted Interaction (UMUAI) James Chen Award is bestowed annually to the author(s) of the best paper of the year. The award has been donated by the Chen family in commemoration of James R. Chen.
[New Publication - March 2020] Our paper related to personalizing the user authentication process of information systems based on users' cross-cultural differences has been accepted at the ACM User Modeling, Adaptation and Personalization (UMAP 2020) papers' main program (23% acceptance rate). The work has been conducted in collaboration with the Shanghai Jiao Tong University.
[New Project - December 2019]
I am enchanted that our project proposal "Development and production of augmented and virtual reality applications supporting narrative tours at the Tomato Industrial Museum "D. Nomikos" has been included for funding within the RESEARCH - CREATE - INNOVATE call. The proposal has been rated among the first 200 out of 2100 submissions (acceptance rate 10%).
The project proposes the production, presentation and promotion of a versatile cultural product that falls within the general context of the Museum's modern operation as cultural industry, thus linking academic research and innovation with entrepreneurship.
[New Publication - December 2019] Our paper related to improving the estimation of graphical password strength based on the interplay between image content familiarity and gaze-behaviour on image hotspots has been accepted at the ACM Intelligent User Interfaces (IUI 2020) papers' main program (16% acceptance rate).[view more]
[New Publication - November 2019] New paper accepted at the IEEE BigData 2019 conference, entitled "The SERUMS tool-chain: Ensuring Security and Privacy of Medical Data in Smart Patient-Centric Healthcare Systems".
[Paper Presentation at ACM WI 2019 - October 2019] I enjoyed participating at the ACM Web Intelligence 2019 conference, and presenting our two papers entitled "Eye Tracking based Cognitive-Centered User Models" and "I Recall this Picture": Understanding Picture Password Selections based on Users' Sociocultural Experiences". I also had the opportunity to meet other researchers and exchange interesting ideas for research.
[Editorial Board - September 2019] I am glad to join the Editorial Board of Heritage (https://www.mdpi.com/journal/heritage), a peer-reviewed and open access journal, covering all aspects of cultural and natural heritage science. The preliminary aims and topics are given at: https://www.mdpi.com/journal/heritage/about.
[New Publications - August 2019] Two papers accepted at ACM Web Intelligence 2019, entitled "Eye Tracking based Cognitive-Centered User Models" and "I Recall this Picture": Understanding Picture Password Selections based on Users' Sociocultural Experiences"
[Shanghai Jiao Tong University - May 2019] I was very delighted to visit the School of Design, Shanghai Jiao Tong University in the context of Erasmus+ International Credit Mobility Programme (KA107). I have been giving lectures for bachelor, master and doctoral students and discussed further research opportunities.
[New Publication - May 2019] Paper accepted at the IFIP TC.13 International Conference on Human-Computer Interaction – INTERACT 2019, entitled "Influences of Mixed Reality and Human Cognition on Picture Passwords: An Eye Tracking Study"
[Guest Editor of Special Issue - April 2019]
I am the Guest Editor of the Special Issue "Virtual Reality and Their Application in Cultural Heritage" at the Applied Sciences Journal, Impact Factor 2.217
Submissions Deadline: 29 February 2020. Please download the Call for Papers (.pdf)
[New Publication - March 2019] Paper accepted at ACM SIGCHI UMAP 2019, entitled "On the Accuracy of Eye Gaze-driven Classifiers for Predicting Image Content Familiarity in Graphical Passwords"
[New EU H2020 Project - February 2019] I am happy to participate in the EU Horizon 2020 Serums project aiming to apply a User-centered Design process for defining new methods and tools for patient-centric user authentication
[Workshop Co-Organizer - January 2019] I am Co-Organizer, together with Dr. Marios Belk, Dr. Elias Athanasopoulos, and Dr. Andreas Pitsillides, of the First International Workshop on Adaptive and Personalized Privacy and Security (APPS 2019), in conjunction with the ACM User Modeling, Adaptation and Personalization (UMAP 2019) conference. Submission due date: March 13, 2019
[Guest Co-Editor - December 2018] I am Guest Co-Editor, together with Dr. Stella Sylaiou, for the Special Issue on ICT for Culture and Tourism at the International Journal of Computational Methods in Heritage Science (IJCMHS). Submission due date: December 20, 2018
[Invited Talk - November 2018] "Human Cognition, Visual Behavior and User Experience in Virtual / Mixed Reality Applications: Case Studies and Interaction Effects", VR@GR: Virtual Reality – Research and Applications in Greece today, held at the Onassis Stegi.
[New Publication - November 2018] Journal paper accepted at User Modeling and User-Adapted Interaction (UMUAI), entitled "A cognition-centered personalization framework for cultural heritage content"
[New Publication - November 2018] Journal paper accepted at ACM Journal on Computing and Cultural Heritage (JOCCH), entitled "Do game designers’ decisions related to visual activities affect knowledge acquisition in cultural heritage games? An evaluation from a human cognitive processing perspective"
[Invited Talk - May 2018] I enjoyed coming back to the University of Cyprus in the context of Erasmus+ Staff Mobility for Teaching Programme. During my stay I had the opportunity to meet my former colleagues and friends and exchange interesting ideas for research. I was also honored to give a talk at the Computer Science Colloquium Series at UCY and give seminars to Ph.D., M.Sc. and B.Sc. students on topics related to information systems, cultural heritage and usable security.
[New Publication - April 2018] Congrats to Argyris Constantinides for his first regular paper at ACM SIGCHI UMAP 2018 concerning his Ph.D. thesis. The paper is entitled "On Cultural-centered Adaptive Graphical Passwords: Improving Password Memorability based on Users’ Collective Memories". Wishes for many more success.
[New Publication - April 2018] Paper accepted at ACM SIGCHI Eye Tracking Research & Applications (ETRA 2018), entitled "Towards Gaze-Based Quantification of the Security of Graphical Authentication Schemes"
[Invited Talk - March 2018] Invited talk, "Human-Centered Design and Evaluation of Digitized Cultural Heritage Experiences", at the 4th Thematic Seminar on "Digitization of Monuments and Archaeological Sites" in the context of the European Project "Collaborative Digitization of Natural and Cultural Heritage, CD-ETA" of the Programme "INTERREG EUROPE".
[New Publication - February 2018] Journal paper accepted at the International Journal of Human-Computer Studies, entitled "Effects of Mixed-Reality on Players' Behaviour and Immersion in a Cultural Tourism Game: A Cognitive Processing Perspective"
[New Publication - December 2017] Full paper accepted at ACM SIGCHI 2018, entitled "Influences of Human Cognition and Visual Behavior on Password Security during Picture Password Composition"
[New Publication - December 2017] Paper accepted for inclusion in the ACM SIGCHI IUI 2018 Papers' Programme, entitled "Eye Gaze-driven Prediction of Cognitive Differences during Graphical Password Composition"
[New Publication - April 2017] Paper accepted at ACM SIGCHI UMAP 2017, entitled "Using Eye Gaze Data and Visual Activities to Infer Human Cognitive Styles: Method and Feasibility Studies"
[New Publication - September 2016] Paper accepted at ACM SIGCHI CHI Play 2016, entitled "Do Field Dependence-Independence Differences of Game Players Affect Performance and Behaviour in Cultural Heritage Games?"
In this work, we have designed and developed CogniKit, an extensible tool for human cognitive modeling. It is based on the analysis, classification and visualization of eye tracking data such as gaze points, fixation count and duration, saccades, gaze transition and stationary entropy, heat maps, areas of interests, etc. These are further processed, analyzed and classified for detecting higher level human cognitive factors such as cognitive processing styles and abilities. CogniKit comprises of two main components: i) a software application that collects and processes low- and high-level eye gaze data metrics in real-time; and ii) an extensible interactive workbench for storing, analyzing, classifying and visualizing the collected eye gaze data.
Mixed reality technologies embrace hand gesture-based interaction modalities, which can be leveraged by picture passwords, as they require users to draw secret gestures on a background image. In this work, we have designed and developed HoloPass, a novel mixed reality application that utilizes the Microsoft HoloLens device that allows users to directly interact with picture-based holograms in order to perform user authentication tasks. The current prototype was developed in Unity 3D, using C# and Microsoft's Mixed Reality Toolkit for HoloLens, and follows implementation guidelines of Microsoft Windows 10 Picture Gesture Authentication in which users draw three secret gestures on a background image that acts as a cue.
This work aims at scaffolding end-users in improving the security of graphical passwords through a playful interaction design in mixed reality. For doing so, we elaborated on a playful interaction de-sign framework and developed, based on it, an experimental mixed reality (MR) application that deployed multi-modal and playful user interaction experiences. A user evaluation woth 30 participants revealed that introducing playful characteristics in the design of MR graphical passwords had a catalyst effect on the security of user generated passwords and simultaneously affected significantly end-users' perceptions and understanding related to security semantics of graphical passwords.
Assistant Professor (2016-2020), Tenure-track Lecturer (2013-2016) at the Department of Cultural Heritage and New Technologies, University of Patras
I am always happy to discuss with prospective students new research endeavors in the areas of Information Systems and Culture, Modelling Human Cognition in Interactive Systems, and Usable Security. If you are interested to discuss your research idea please don't hesitate to contact me at fidas AT upatras.grSuggested Topics for Ph.D.