Tutorial 4 - ICEDEG 2024

Title:  Trust in Digital Government Services Revisited — Will PKI and Blockchain Incorporate in the Zero-Trust Era

Target Audience

This tutorial targets policymakers, decision-makers, public officials, researchers, and practitioners from government, academia, civil society organizations, and enterprises working on government oversight and monitoring at any level familiar with digitalization and digital transformation. No prerequisite technical knowledge is required. Participants should have a basic knowledge of digital government services from the policy-making and architectural point of view.

Importance of Topic

As governments navigate the challenges of the digital world partly brought on by citizens' demand for customized, personalized digital experiences, they need a platform that encourages trust and observability.  


  • PKI vs. Blockchain fundamentals: Introduce centralized and decentralized trust for digital government services and analyze their potential incorporation
  • PKI Governance: Discuss the most-renowned national trust models and their practicality with digital government services.
  • PKI Design best practices: Address the best practices in terms of national PKI design for digital government based on a benchmark study
    Certificate Lifecycle Management process (lab activity): Deploy a 2 tier PKI to test Certificate Verification and Chain Building, Certificate Revocation Lists (CRLs), and Online Certificate Status Protocol (OCSP)
  • PKI operations (lab activity):
    • Install and configure offline root CA
    • Publish root CA certificate and CRL to CDP and AIA URLs
    • Install and configure subordinate CA
    • Post-install health checks
    • CA Security
  • National blockchain applications: Discuss the use of blockchain technology as a hub for national digital government services (based on a benchmark study)
  • Blockchain building blocks: Introduce the consensus mechanisms and the distributed storage techniques used in common blockchain platforms
  • Deploy a simple blockchain network (lab activity): A set of instructions will be presented and analyzed to demonstrate how customized ERC-20 and ERC-721 tokens can be created and used
  • Integration of PKI and Blockchain for Zero-Trust architectures: Discuss the potential beyond the combined use of PKI and Blockchain for digital government services
  • Self-Sovereign Identity, the showcase (lab activity): Illustrate the practical combination of PKI and Blockchain in the context of Self-Sovereign Identity for digital government services 


Prof. Mohamed Hamdi (PhD, habilitation) is currently a cybersecurity expert at the Arab ICT Organization (League of Arab States) and a full professor at the Higher School of Communications (University of Carthage), Tunisia. In 2022, he was the Leader of the Experts’ Team in charge of elaborating the Arab Cybersecurity Strategy (League of Arab States). He has led the development of more than ten national and institutional cybersecurity strategies. Between 2015 and 2021, he was the founding director of Elagzala Innovation Center. He led the implementation of high-added-value innovative projects in this national pilot experience. He has given courses as an adjunct professor in multiple universities, including Cambridge University (UK) and the Institut Polytechnique de Paris (France). Between 2012 and 2015, he was a visiting researcher at the Norwegian Computing Center, where he was involved in the ASSET project. His main contribution was to develop risk-based security models for IoT based on game theory. He co-authored over 150 scientific publications in international books, journals, and conferences. Dr. Hamdi is the author of the book "Mathematical Theories for Computer and Network Security Engineering (Wiley, 2018)"



Dr. Manel Abdelkader is currently the Head of the IT Department at Tunis Business School, University of  Tunis. She was previously the Head of the Certification and PKI Unit at the National Digital Certification Agency, Tunisia's national root certification authority. She was in charge of leading the elaboration of the national policies and tools in the area of trust tools for government services. She has been involved in several international projects related to PKI, digital trust, and cybersecurity in Oman, Burkina Faso, and Sudan. She is currently conducting research in the areas of artificial intelligence schemes for Zero-Trst architectures.


Next Event

24 - 26 June 2024
Lucerne, Switzerland

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