Security & Trust

Tahir Ahmad

Tahir Ahmad Researcher

Tahir Ahmad received his Master’s in Computer and Communication Security from the School of Electrical Engineering and Computer Science (SEECS), National University of Science & Technology (NUST) Islamabad, Pakistan, in 2013. He obtained his PhD with a European PhD. Label in Computer Science and Systems Engineering from the Department of Computer Science, Bioengineering, Robotics and Systems Engineering (DIBRIS), University of Genova, Italy, in 2020. He has over 17 years of research experience in various national and international R&D organizations. His research interests are in distributed systems security, with particular emphasis on understanding the security issues in the current data-driven Internet-connected world and exploring practical solutions for improving their security and privacy.



  • Tahir Ahmad, Umberto Morelli, Silvio Ranise
    Distributed Enforcement of Access Control policies in Intelligent Transportation System (ITS) for Situation Awareness
    In: 17th International Workshop on Frontiers in Availability, Reliability and Security (FARES2022) (DOI, news)


  • Tahir Ahmad, Umberto Morelli, Silvio Ranise, Nicola Zannone
    Extending access control in AWS IoT through event-driven functions: an experimental evaluation using a smart lock system
    In: International Journal of Information Security (DOI)


  • Tahir Ahmad, Umberto Morelli, Silvio Ranise
    Deploying Access Control Enforcement for IoT in the Cloud-Edge Continuum with the help of the CAP Theorem
    In: 25th ACM Symposium on Access Control Models And Technologies (SACMAT 2020) (news)


  • Andrea Palmieri, Paolo Prem, Silvio Ranise, Umberto Morelli, Tahir Ahmad
    MQTTSA: A Tool for Automatically Assisting the Secure Deployments of MQTT brokers
    In: IEEE SERVICES Workshop on Cyber Security & Resilience in the Internet of Things (IEEE SERVICES CSRIoT 2019) (DOI, news)


  • Tahir Ahmad, Umberto Morelli, Silvio Ranise, Nicola Zannone
    A Lazy Approach to Access Control as a Service (ACaaS) for IoT: An AWS Case Study
    In: 23rd ACM Symposium on Access Control Models And Technologies (SACMAT 2018) (DOI, news)
  • Tahir Ahmad, Silvio Ranise
    Validating Requirements of Access Control for Cloud-Edge IoT Solutions
    In: 11th International Symposium on Foundations & Practice of Security (FPS 2018) (DOI, news)


  • Tahir Ahmad (PhD Thesis, University of Genoa, 2020)
    Access Control for IoT: Problems and Solutions in the Smart Home (link)
    Supervisors: Alessandro Armando, Silvio Ranise

Supervised Theses


  • Roberta Peracchio (Master's Thesis, University of Trento, 2023)
    Exploring Digital Travel Credentials: A Comparative Study of Existing Solutions and Image Quality Assessment for Face Recognition
    Supervisors: Silvio Ranise | Co-supervisors: Tahir Ahmad, Cecilia Pasquini


  • Nicola Casagrande (Bachelor's Thesis, University of Trento, 2022)
    Dematerialized Documents: The Italian Driving License Use Case
    Supervisors: Silvio Ranise | Co-supervisors: Giada Sciarretta, Tahir Ahmad