COST EU Workshop on Privacy Issues in Distributed Social Knowledge Graphs (PIDSKG)

Start: Mon Jun 13th 2022 at 9:00 (CEST) / Mon Jun 13th 2022 at 3:00 (EDT) / Mon Jun 13th 2022 at 15:00 (CST)

End: Wed Jun 15th 2022 at 17:00 (CEST) / Wed Jun 15th 2022 at 11:00 (EDT) / Wed Jun 15th 2022 at 23:00 (CST)

Location: 11, Porte des Sciences, 4366, Porte des Sciences, Esch-sur-Alzette, Luxembourg


To systematically explore the legal and technical aspects of privacy in the context of Distributed Social Knowledge Graphs. We aim to extract precise privacy requirements for personal Knowledge Graphs related to norms such as those described in GDPR, ISO 27001, 190086, NIST SP 800-122, and EU ePrivacy Directives. We aim to establish links between such privacy goals and design decisions in protocols for interacting with Knowledge Graphs, such as the Social Linked Data protocol suite Solid. We will also explore to what extent emerging requirements lead to an evolution of security and privacy goals, for instance, when designing a system that balances requirements such as presenting views of logs to the data protection officer or to administrators for evaluating data breaches, against other requirements such as the right to be forgotten.

Call for Contributions

Please contact Ross Horne at if you would like to contribute to this workshop in any of the following ways:

  • You may wish to propose a demo of your work on Solid on the afternoon of day 1.
  • You may wish to contribute to the discussion on legal aspects of Solid and government outreach on day 2.
  • You may wish to contribute to the technical discussion on security & privacy aspects of Solid on day 3.
  • You may be a member of the COST DKG network and wish to attend all sessions, and contribute to the discussion towards deliverables.


Keynote speaker: Prof. Dr. B.P.F. (Bart) Jacobs, Radboud University Nijmegen, NL:

"Bart Jacobs, Professor of Security, Privacy and Identity at Radboud University Nijmegen, tirelessly probes into issues that you may not always want to hear about, but which you need to know. He has identified vulnerabilities in public transport chip cards, bank passes, electronic voting machines, ‘smart’ meters and car keys, not to mention in numerous databases containing personal data. With his background in mathematics, he also devises secure alternatives such as the IRMA app, which allows users to protect their privacy when logging on to websites.”

From Stevin Prize 2021 announcement:

Bart Jacobs will talk about IRMA, which allows citizens to prove their identity, without having to present an ID document and share all the data in it. Identity infrastructure is an essential ingredient for managing security and privacy in distributed networks of personal data, such as Solid.

Invited speaker (on directions for Solid): Prof. Ruben Verborgh, Ghent University–imec, BE

Ruben Verborgh is Professor of decentralized Web technology at IDLab of Ghent University–imec and Visiting Fellow at the Oxford Martin School within the University of Oxford. He is also a Solid Ecosystem Architect for Inrupt and an advisor to other companies. From this hybrid academic and industrial perspective, his professional goal is to support Solid on its mission to inspire, transform, and reshape our data-driven society.

Adapted from:

Provisional plan (in brief):

Monday 13th June: Solid and Distributed Identity morning: Invited speakers: Bart Jacobs & Ruben Verborgh (broadcast to action) afternoon: Demo and hands on sessions using Solid (on site)

Tuesday 14th June: Privacy Law and Solid morning: Sessions engaging government stakeholders afternoon: Focus on privacy law gap evening: social event in Luxembourg

Wednesday 15th June: A Security & Privacy Assessment of the Solid protocol morning: Technical sessions on security & privacy of protocols afternoon: Parallel discussions and summary of outcomes

COVID-19: This will be a CovidCheck event, meaning proof of vaccination or a test is required, subject to changes of rules by the Luxembourg government.

Culture: Esch-sur-Alzette is European Capital of Culture 2022:


  • Christian Esposito (Italy)
  • Olaf Hartig (Sweden)
  • Ross Horne (Luxembourg)
  • Tobias Kafer (Germany)
  • Chang Sun (Netherlands)

Local organizers

  • Ross Horne (University of Luxembourg)
  • Marcos Da Silveira (Luxembourg Institute of Science and Technology)
  • Rita Giannini (University of Luxembourg)