Skip to main content
Dr George Theodorakopoulos

Dr George Theodorakopoulos

Senior Lecturer

School of Computer Science and Informatics

+44 (0)29 2087 4855
4.15, Abacws, Senghennydd Road, Cathays, Cardiff, CF24 4AG
Media commentator


My research interests span privacy, security, and (computational) trust in mobile networks.

Privacy is my main current focus, and these are the questions I try to answer:

  • In what ways do we disclose private information (through smartphone apps, social networks, Internet-enabled devices)?
  • How can we protect our information without going off the grid (by adding some sort of noise)?
  • Most importantly, how can we reason concretely and quantitatively about privacy attacks and defences (e.g. in order to provide privacy guarantees, or to monetize private information appropriately)?


George Theodorakopoulos received the Diploma degree from the National Technical University of Athens, Greece, in 2002, and the M.S. and Ph.D. degrees from the University of Maryland, College Park, MD, USA, in 2004 and 2007, all in electrical and computer engineering.

He is a Senior Lecturer at the School of Computer Science & Informatics, Cardiff University, since 2012. From 2007 to 2011, he was a Senior Researcher at the Ecole Polytechnique Federale de Lausanne (EPFL), Switzerland. He is a coauthor (with John Baras) of the book Path Problems in Networks (Morgan & Claypool, 2010).

He received the Best Paper award at the ACM Workshop on Wireless Security, October 2004, for "Trust evaluation in ad-hoc networks" and the 2007 IEEE ComSoc Leonard Abraham prize for "On trust models and trust evaluation metrics for ad hoc networks." He coauthored the paper "Quantifying Location Privacy," which was runner-up for the 2012 PET Award (Award for Outstanding Research in Privacy Enhancing Technologies) and received a Test of Time award at 2021 IEEE Symposium on Security and Privacy.

Education and qualifications

  • 2007: PhD in Electrical and Computer Engineering, University of Maryland, College Park, MD, USA
  • 2004: MSc in Electrical and Computer Engineering, University of Maryland, College Park, MD, USA
  • 2002: Diploma (5yr BSc) in Electrical and Computer Engineering, National Technical University of Athens, Greece

Honours and awards

Professional memberships

Member of the IEEE

Academic positions

  • 2018 - present: Senior Lecturer, Cardiff University, School of Computer Science and Informatics
  • 2012 - 2018: Lecturer, Cardiff University, School of Computer Science and Informatics
  • 2011 - 2012 Lecturer, University of Derby, School of Computing and Mathematics
  • 2007 - 2011 Senior Researcher, Ecole Polytechnique Federale de Lausanne (EPFL), Switzerland

Committees and reviewing

  • Associate Editor, IEEE Transactions on Information Forensics and Security
  • Grant reviewer for EPSRC, Royal Society, Leverhulme Trust, Dutch Research Council (NWO), German Research Foundation (DFG), Swiss Research Council (SNF)
  • Book proposal reviewer for Elsevier, CRC Press - Taylor & Francis Group, NOW Publishers (Foundations and Trends in Privacy and Security)









  • Theodorakopoulos, G. 2015. The same-origin attack against location privacy. Presented at: 22nd ACM Conference on Computer and Communications Security, Denver, Colorado, USA, 12-126 October 2015 Presented at Ray, I., Hopper, N. and Jansen, R. eds.WPES '15 Proceedings of the 14th ACM Workshop on Privacy in the Electronic Society. ACM pp. 49-53., (10.1145/2808138.2808150)





  • Shokri, al. 2011. Quantifying location privacy. Presented at: 2011 IEEE Symposium on Security and Privacy (SP), Berkeley, CA, USA, 22-25 May 2011 Presented at O’Conner, L. ed.Proceedings of the 2011 IEEE Symposium on Security and Privacy (SP). Los Alamitos, CA: IEEE pp. 247-262., (10.1109/SP.2011.18)






  • Theodorakopoulos, G. and Baras, J. S. 2004. Trust evaluation in ad-hoc networks. Presented at: WiSe '04:3rd ACM workshop on Wireless security, 1 October 2004 Presented at Jakobsson, M. and Perrig, A. eds.WiSe '04 Proceedings of the 3rd ACM workshop on Wireless security. New York, NY: ACM pp. 1-10., (10.1145/1023646.1023648)


I teach cryptography, malware analysis, and penetration testing.


I am open to new topics, but I am particularly interested in supervising PhD students on

  • security and privacy in IoT devices and networks
  • privacy in machine learning

Please look at my publications to see more details about the topics I am working on and about the methods I use in my research. I am more likely to supervise students that show me they have some idea of my research.

Current supervision

Turki Al Lelah

Research student

Fahad Alodhyani

Research student

Past projects

Stylianos Mamais - Privacy-Preserving and Fraud-Resistant Targeted Advertising for Mobile Devices (awarded 2019)

Alanoud Subahi - Evaluating compliance of the actual behaviour of IoT devices with their Privacy Policy Agreement (awarded 2021)