I am a Doctoral Researcher in the Information Security Group at University College London, where I study security and privacy aspects of digital ecosystems, with a focus on emerging technologies and previously unknown attack vectors. My supervisors are Professor George Danezis and Dr. Emiliano De Cristofaro.

My recent study on ultrasound tracking received wide-spread attention and is considered the seminal work on the security of that ecosystem. Currently, I am working towards the standardization of ultrasound communications, and design extensions of my previous attacks. Moreover, in cooperation with industrial partners, I recently released a prototype of a high-assurance hardware architecture, that maintains its security properties even in the presence of malicious hardware components.

In the past, I developed auditing tools for the Public Key Infrastructure of Deutsche Bank and participated in an international consortium studying large-scale security threats in telecommunication networks. Furthermore, I cooperated with the Computer Security Group of University of California, Santa Barbara in several projects, including a detection system for evasive web-malware.

I hold an M.Sc. in Information Security from UCL, and a B.Sc in Computer Science from University of Macedonia, Greece.

Vasilios Mavroudis

v.mavroudis at cs.ucl.ac.uk

Computer Science Department
University College London
Gower Street
London WC1E 6BT
United Kingdom


  • On the Privacy and Security of the Ultrasound Tracking Ecosystem.
    Mavroudis V., Hao S., Fratantonio Y., Maggi F., Kruegel C., Vigna G., Proceedings of the Privacy Enhancing Technologies Symposium Minneapolis, MN July, 2017
  • Visual Analytics for enhancing supervised attack attribution in mobile networks.
    Papadopoulos S., Mavroudis V., Drosou A.., Tzovaras D., 29th International Symposium on Computer and Information Sciences 2014
  • Development of realtime mobile security monitoring system.
    Mavroudis V., Mavridis I., 2nd conference on information technology applications and administration strategies, Greece, 2010.
  • Use and effective appliance of free and open source software in education.
    Mavroudis V., Mouratis S., 4th national conference of information technology teachers, Greece, 2010.
  • On the Privacy & Security of the Ultrasound Tracking Ecosystem. Computer Laboratory Security Seminar, Cambridge, UK, 21 February 2017.
  • Talking Behind Your Back: On the Privacy & Security of the Ultrasound Tracking Ecosystem. Mozilla International Privacy Day, London, UK, 28 January 2017.
  • Talking Behind Your Back: On the Privacy & Security of the Ultrasound Ecosystem. Information Security Seminar, UCL, London, UK, 19 January 2017.
  • Talking Behind Your Back: Tough Love for the ugly Ultrasound Tracking Ecosystem. Chaos Communication Congress, Hamburg, Germany, 27-30 December 2016.
  • Cross-device Tracking Canaries. Data Transparency Lab Conference 2016, New York, US, 17-19 November 2017.
  • Talking Behind Your Back: Attacks and Countermeasures of Ultrasonic Cross-device Tracking. Blackhat Europe, London, UK, 3–4 November 2016. [Slides]
  • Cassiopeia: Mobile security monitoring. FOSS conference 2011, Greece.
Technical Reports
  • Crux: Privacy-preserving Statistics for Tor, Information Security Group, University College London, UK, 2015.
    Supervisor: George Danezis
  • Cassiopeia: Real-time mobile security monitoring system, Dept. of Applied Informatics, University of Macedonia, Greece, 2012.
    Supervisor: Ioannis Mavridis