Adopt a Loggerhead sea turtle

I am an Assistant Professor at the Cultural Technology Lab in the Department of History and Archaeology at the University of Patras. I received a PhD and BSc from the Electrical & Computer Engineering Department, University of Patras.

My research is related with investigating the influence of human aspects in the design and evaluation of information systems, with a special emphasis on cultural heritage informatics, aiming to drive the development of bootstrapped IT solutions to the unique cultural, cognitive and individual characteristics of the end-users.

Email: fidas AT upatras.gr :: LinkedIn Profile: https://www.linkedin.com/in/fidas
Find me also at
Google Scholar ACM Digital Library DBLP Scopus University of Patras


[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).

[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"

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  • German Patent & Trade Mark Office (Deutsches Patent- und Markenamt): Method and apparatus for flexible user authentication based on individual human cognitive characteristics (Methode und vorrichtung zur flexiblen benutzerauthentifizierung basierend auf individuellen menschlichen kognitiven eigenschaften) – patent pending
  • Greek Industrial Property Organisation (Οργανισμός Βιομηχανικής Ιδιοκτησίας): Methods and tools to support and monitor in real time visitors of the World Wide Web (N. Patent No. 1004805.OVI, INT. CL G06F 17/60, g06f 15/163)

Honors and Awards

  • Seal of Excellence - Horizon 2020 Marie Skłodowska-Curie actions call H2020-MSCA-IF-2016
    For a high-quality project proposal in a highly competitive evaluation process, namely CogniPass – Cognition-based Personalised Authentication SchemeS
  • Best Paper Nomination Award and Honourable Mention at UMAP 2014 Conference (July 2014)
    Research paper entitled "A Personalisation Method based on Human Factors for Improving Usability of User Authentication Tasks"

Selected Publications

Information Systems and Culture
Springer UMUAI
Raptis, G., Fidas, C., Avouris, N. (2019). A cognition-centered personalization framework for cultural heritage content, User Modeling and User-Adapted Interaction (UMUAI). The Journal of Personalization Research - SNIP: 6.6, 29(1), 9-65, Springer [https://doi.org/10.1007/s11257-019-09226-7]
Raptis, G., Fidas, C., Avouris, N. (2019). Do game designers’ decisions related to visual activities affect knowledge acquisition in cultural heritage games? An evaluation from a human cognitive processing perspective, ACM Journal on Computing and Cultural Heritage (JOCCH) - Cite Score: 1.62, 12(1), 4:1-25, ACM Press [https://doi.org/10.1145/3292057]
Elsevier IJHCS
Raptis, G., Fidas, C.A., Avouris, N. (2018). Effects of mixed-reality on players' behaviour and immersion in a cultural tourism game: A cognitive processing perspective, International Journal of Human-Computer Studies - Cite Score: 3.38, Elsevier, 69-79 [https://doi.org/10.1016/j.ijhcs.2018.02.003]
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Eye Tracking, Cognition and User Modeling
Web Intelligence 2019
Fidas, C. (2019). Eye tracking based cognitive-centered user models, ACM Conference on Web Intelligence (WI 2019), ACM Press, 433-437 [https://doi.org/10.1145/3350546.3352563]
Fidas, C., Belk, M., Hadjidemetriou, G., Pitsillides, A. (2019). Influences of mixed reality and human cognition on picture passwords: An eye tracking sudy, IFIP Conference on Human-Computer Interaction (INTERACT 2019), Springer, 304-313 [https://doi.org/10.1007/978-3-030-29384-0_19]
Constantinides, A., Belk, M., Fidas, C., Pitsillides, A. (2019). On the accuracy of eye gaze-driven classifiers for predicting image content familiarity in graphical passwords, ACM SIGCHI User Modeling, Adaptation and Personalization (UMAP 2019), ACM Press, 201-205 [https://doi.org/10.1145/3320435.3320474]
Katsini, C., Raptis, G., Fidas, C., Avouris, N. (2018). Towards Gaze-Based Quantification of the Security of Graphical Authentication Schemes, ACM SIGCHI Symposium on Eye Tracking Research & Applications (ETRA 2018), ACM Press, 17:1-5 [https://doi.org/10.1145/3204493.3204589]
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Usable Security: User Authentication and Human Interaction Proofs
ACM CHI 2018
Katsini, C., Fidas, C., Raptis, G., Belk, M., Samaras, G., & Avouris, N. (2018). Influences of human cognition and visual behavior on password security during picture password composition. ACM SIGCHI Human Factors in Computing Systems (CHI 2018), ACM Press, paper 87 [https://doi.org/10.1145/3173574.3173661]
Elsevier CHB
Belk M., Fidas C., Germanakos P., & Samaras G. (2017) The interplay between humans, technology and user authentication: a cognitive processing perspective, Computers in Human Behavior - Cite Score: 4.57, 76, 184-200, Elsevier [https://doi.org/10.1016/j.chb.2017.06.042]
Elsevier IJHCS
Belk M., Fidas C., Germanakos P., & Samaras G. (2015) Do human cognitive differences in information processing affect preference and performance of captcha?, International Journal of Human - Computer Studies - Cite Score: 3.38, 84, 1-18, Elsevier [http://dx.doi.org/10.1016/j.ijhcs.2015.07.002]
ACM CHI 2011
Fidas, C.A., Voyiatzis, A.G., Avouris, N.M. (2011). On the necessity of user-friendly captcha. ACM SIGCHI Human Factors in Computing Systems (CHI 2011), ACM Press, 2623-2626 [http://dx.doi.org/10.1145/1978942.1979325]


I have worked as a project manager, user experience expert and information systems architect in numerous EU-funded, National and industrial research projects like:

  • H2020-SERUMS: Securing Medical Data in Smart Patient-Centric Healthcare Systems (2019-2021, WP5 - User Authentication and Trust) - http://serums-smartpatient.com/
  • FP7-CR-PLAY: Capture Reconstruct Play (2013-2016, WP5 Leader - Formative and Summative Evaluation) - http://www.cr-play.eu
  • FP7-SERIES: Seismic Engineering Research Infrastructures for European Synergies (2009-2013, Lead of Information Systems Architecture Design and Implementation) - http://www.series.upatras.gr
  • FP6-QALIBRA: Quality of life-integrated benefit and risk analysis web-based tool for assessing food safety and health benefits (2006-2010, Lead of Evaluation) - http://www.qalibra.eu
  • FP6 e-Ten-COMMODE: Collaborative modeling environment (2005-2006, Lead of Evaluation and Pilot Studies)
  • IST-MODELLINGSPACE: Space of ideas expression modeling and collaboration (2001-2004, Software Engineer)


Assistant Professor (2016-), Tenure-track Lecturer (2013-2016) at the Department of Cultural Heritage and New Technologies, University of Patras

  • New Interactive Media (M.Sc.)
  • Human-Computer Interaction (B.Sc.)
  • Structural Programming (B.Sc.)
  • Visual Programming (B.Sc.)
  • Pervasive Computing and Cultural Heritage (B.Sc.)

Visiting Assistant Professor at the Department of Computer Science, University of Cyprus (2011-2013)

  • Human-Computer Interaction (B.Sc.)
  • Programming Priniciples for Engineers (B.Sc.)
  • Operating Systems (B.Sc.)
  • Introduction to Computer Science (B.Sc.)

Adjunct Lecturer at the University of Patras, University of Ioannina, Technical Institute of Patras (2004-2011)

Academic Service


Prospective Students

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.gr

Suggested Topics for Ph.D.
  • AR and VR Effects on Human Cognition within Cultural Heritage Informatics
  • Investigating the Effects of Human Emotions in User Authentication
  • Adaptable User Authentication in Ubiquitous Computation Realms
Ph.D. Students
  • Argyris Constantinides (with University of Cyprus): Leveraging on Users' Cultural Factors for Increasing Graphical Password Memorability and Security - Jan. 2018-
  • George Raptis: A Personalized Cultural Heritage Framework based on Human Cognitive Processing - Sept. 2016-
  • Christina Katsini: Methods and Techniques for Usable and Secure User Authentication in Natural User Interaction - Sept. 2016-
  • Marios Belk: Adaptive Usable Security: Personalising User Authentication and CAPTCHA based on Individual Differences in Cognitive Processing - Successfully defended December 2015

Scientific Community Service

Review Service in International Journals and Conferences

  • ACM CHI - SIGCHI Conference on Human Factors in Computing Systems
  • ACM Transactions on the Web
  • ΙEEE Transactions on Games
  • ΙΕΕΕ Transactions on Fuzzy Systems
  • IEEE Internet Computing Magazine
  • Behaviour & Information Technology, Elsevier
  • Journal of Network and Computer Applications, Elsevier
  • Industrial Marketing Management, Elsevier
  • Computers & Security , Elsevier
  • Energy Research & Social Science, Elsevier
  • International Journal of Human - Computer Studies, Elsevier
  • Heritage, MDPI
  • International Journal of Computational Methods in Heritage Science, IGI Global
  • Multimodal Technologies and Interaction, MDPI
  • Cryptography, MDPI
  • Information Technology & People, Emerald
  • Computers and Education, Elsevier
  • Applied Sciences, MDPI
  • Interacting with Computers, Oxford
  • IBM Journal of Research and Development