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Dr Theo Tryfonas

Dr Theo Tryfonas

Dr Theo Tryfonas
BSc(Crete), MSc(Athens), PhD(Athens), MBCS CITP, CISA

Senior Lecturer in Systems Engineering

Area of research

Cybersecurity and Smart Cities

Office 2.22
Queen's Building,
University Walk, Clifton BS8 1TR
(See a map)

+44 (0) 117 331 5740


I work broadly in the fields of smart cities, cybersecurity, sustainability and systems engineering. My work in smart cities includes energy efficiency of wireless sensor networks, secure and resilient operation of Internet of Things (IoT) applications, privacy in mobile computing, open data architectures for smart buildings, integration of industrial control systems and SCADA with the IoT etc. In general I am interested in how these technologies can be used to deliver a more sustainable future – both in terms of resource efficiency and of operational improvement.

My research in cybersecurity includes applying Systems techniques for information risk management, such as system dynamics and viable system modelling, network analytics and game theory. I have also worked on digital forensics techniques, looking at the extraction and analysis of digital evidence, particularly from emerging technologies such as mobile phones, wireless sensor networks and social media. In addition, I have provided evidence in court as Expert Witness on a number of cases.


I am a Senior Lecturer in Systems Engineering with a background in computer security and software development. I work with the Cryptography Group and the Systems Centre and I am involved in doctoral supervision with the engineering doctorate (EngD) in Systems, as well as with teaching across our Computer Science MSc and the undergraduate programmes of Engineering Design and Civil Engineering.

In the past I worked as a programmer, consultant and auditor and have kept close ties with industry after becoming an academic, providing on occasion expert witness advice, continuing professional development courses etc. My work has been focused on a diverse range of sectors, including transportation, utilities, healthcare and government. I have worked in particular on aspects of marine safety and port security, public transport resilience, protection of UAVs, telecom revenue and system assurance, as well as contributed to investigations of computer-assisted crime.

I graduated with a BSc in Computer Science from the University of Crete in Greece. I then moved to Athens to complete my postgraduate studies, first at master's (Information Systems) and then at doctoral level (Informatics). My PhD was sponsored by Ernst & Young, one of the "Big Four" global assurance and advisory firms. I'm a Chartered Professional Member of the Chartered Institute for IT (MBCS CITP) and a Certified Information Systems Auditor (CISA) member of ISACA. I am also a member of the International Council on Systems Engineering (INCOSE).

In my spare time I enjoy spending quality time with my daughter Chrissa-Sophia, my little boy Gabriel and my wife Catherine, who's a planetary scientist and won't stop talking about Mars. I also like sport, mainly rugby and mixed martial arts. And for some random reason I am fascinated by church architectures.


I teach a diverse range of subjects across the Faculty of Engineering. Systems Security is a postgraduate unit in Computer Science, serving as a broad introduction to computer security. Systems Engineering is part of the EngD in Systems programme looking at how we build, deliver and control complex and usually large-scale engineering systems - anything from computer applications to bridges and space rockets. Systems & Technologies for Smart Cities is an introduction of second year Civil Engineers to the capabilities of ICTs within the context of future cities.


  • Cybersecurity
  • Smart Cities
  • Systems Engineering
  • Sustainability

Selected publications

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Recent publications

View complete publications list in the University of Bristol publications system


Dr Tryfonas currently teaches 3 courses:

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