We are pleased to share that our paper “Libertas: Privacy-Preserving Collaborative Computation for Decentralised Personal Data Stores” has been accepted by the preminer HCI conferfence CSCW, to be presented in November 2025.

Data and data processing have become an indispensable aspect for our society. Insights drawn from collective data make invaluable contribution to scientific, societal and communal research and business. But there are increasing worries about privacy issues and data misuse. This has prompted the emergence of decentralised personal data stores (PDS) like Solid that provide individuals more control over their personal data. However, existing PDS frameworks face challenges in ensuring data privacy when performing collective computations that combine data from multiple users. While Secure Multi-Party Computation (MPC) offers input secrecy protection during collective computation without relying on any single party, issues emerge when directly applying MPC in the context of PDS, particularly due to key factors like autonomy and decentralisation. In this work, we discuss the essence of this issue, identify a potential solution, and introduce a modular system architecture, Libertas, to integrate MPC with PDS like Solid, without requiring protocol-level changes. We introduce a paradigm shift from an ‘omniscient’ view to individual-based, user-centric view of trust and security, and discuss the threat model of Libertas. Two realistic use cases for collaborative data processing are used for evaluation, both for technical feasibility and empirical benchmark, highlighting its effectiveness in empowering gig workers and generating differentially private synthetic data. The results of our experiments underscore Libertas’ linear scalability and provide valuable insights into compute optimisations, thereby advancing the state-of-the-art in privacy-preserving data processing practices. By offering practical solutions for maintaining both individual autonomy and privacy in collaborative data processing environments, Libertas contributes significantly to the ongoing discourse on privacy protection in data-driven decision-making contexts.

The full paper can be found arxiv with the code accessible from Github

On Feb 26, 2025, Prof Ruben Verborgh, Sir Tim Berners-Lee & Sir Nigel Shadbolt gave a public seminar on ‘Towards re-decentralising the Web: an ethical web and data infrastructure’ at the Oxford Martin School.

In this talk, Prof Ruben Verborgh, Visiting Fellow of EWADA, was joined by Prof Sir Tim Berners-Lee and Prof Sir Nigel Shadbolt and discussed how new forms of technical and legal infrastructure are being developed and deployed to provide a more equitable and ethical treatment of individual users in the age of AI. The seminar outlined the challenges of achieving better data autonomy, providing individuals with better rights to data privacy while enabling them to benefit from the exciting possibilities of digital innovations.

The seminar, chaired by Professor Sir Charles Godfray, was well-attended by students, researchers from the university, and members of the general public. It began with an insightful overview of the need for a new form of data governance, followed by an introduction to the Solid architecture and a review of current developments in the deployment of decentralized data systems. The session concluded with an open discussion with the audience.

Our DPhil student Jesse Wright has been attending the prestigious Dagsthul Seminar Trust and Accountability in Knowledge Graph-Based AI for Self Determination in January 2025.

As a result of this seminar, participants of this seminar co-authored a seminal paper “Towards Computer-Using Personal Agents”.

The paper outlines the vision of Computer-Using Agents (CUA), which are expected to enable users to automate increasingly complex tasks, in the not too far future, using graphical interfaces such as browsers. The authors propose Computer-Using Personal Agents (CUPAs) that have access to an external repository of the user’s personal information, offering users better control of their personal data, the potential to automate more tasks involving personal data, better interoperability with external sources of data, and better capabilities to coordinate with other CUPAs in order to solve collaborative tasks involving the personal data of multiple users.

The full paper can be found arxiv.

We began the new year with two new Design Issue blog posts by Sir Tim Berners-Lee, co-I of the EWADA project.

In these posts Sir Tim Berners-Lee outlines a transformative future for the World Wide Web, emphasising decentralisation, user empowerment, and enhanced interoperability. Central to this vision is the Solid protocol —- a decentralised system allowing individuals to own and control their personal data through ``pods’’, facilitating seamless interactions across diverse applications and platforms.

Drawing parallels to Metcalfe’s Law, which states that the value of a network increases with the square of its users, Solid envisions a web where the interconnectedness of applications amplifies their utility. As more applications integrate with Solid pods, the collective value and functionality of the web grow exponentially, benefiting users and developers alike.

Solid encourages the development of ``no-code’’ applications, allowing users to create and customise tools without extensive programming knowledge. This democratisation of app development fosters innovation and enables communities to build solutions tailored to their specific needs, promoting a more inclusive and participatory digital ecosystem.

The adoption of Solid is poised to drive economic growth by enhancing productivity and collaboration. However, the primary goal remains to empower individuals and communities, enabling them to address global challenges through collective action and shared resources. This paradigm shift emphasises the importance of creativity, compassion, and cooperation in shaping the future of the web.

Sir Tim’s vision presents a compelling roadmap for a decentralised web that prioritises user control, interoperability, and community-driven innovation. By embracing the principles of Solid, the web can evolve into a more equitable and interconnected space, unlocking new possibilities for individuals and society as a whole.

For a deeper exploration of this vision, you can read the full articles here:

• The Vision of a New World
• Charlie Works

The year 2023 has witnessed the rapid rise of generative AI technologies and the first global AI Safety Summit hosted by the UK government at Bletchley Park. Amidst this unprecedented change, debates about data, AI algorithmic processing, and their impacts on national safety, citizen healthcare, and career and education opportunities have intensified like never before.

The goal of the EWADA project is to develop new technical and legal infrastructures that enable more equitable and ethical experiences for users. Following two successful years of foundational technology development, the third year has seen the refinement of privacy-preserving AI applications, the implementation of a protocol and schema for users’ data terms of use, and an ongoin large-scale, cross-cultural study on users’ values regarding data autonomy.

Additionally, multiple studies have been conducted with specific user groups, such as social media users, health trackers, and children. Seven new prototypes were produced to develop capabilities in areas like personal data queries, children’s data autonomy, new ways of social interactions and personal health tracking.

These technical explorations allow us to delve deeply into the open challenges related to scalability, trade-off between ethical computing and utility, and barriers for users to opt for ethical alternatives. Against the backdrop of generative AI (genAI) development, which has intensified concerns over data privacy, fairness, and control over personal information, EWADA’s work offers critical inputs in creating user-centred, transparent frameworks for enabling ethical AI interactions. This is particularly relevant as genAI’s rapid adoption raises pressing questions about user consent, data rights, and the ethical use of personal information in automated systems.

Our research so far has shown that users, including children, generally welcome the data autonomy and control provided by EWADA and Solid. However, challenges remain, especially in supporting users in exercising data autonomy, helping users navigate decentralised data governance models like data trust or data commons, and addressing new issues arising from genAI adoption.

Beyond the project development, our team has made significant policy impacts through our involvement in the Data Bill revision and various national reports on Data Governance, contributing to the national conversation about the new need for better data governance and infrastructure, especially in the context of several national emergencies and new legislation developments.

We have also seen increased leadership from our early-career researchers, engaging with various communities, including industry, partner projects, and open-source communities. These impact deliveries led to a flurry of successful grant applications, ranging from small bids awarded to individual researchers to larger grants for full student scholarships and follow-up research. It has been particularly pleasant to see the undertaking of Solid stewardship by the Open Data Institutue, a cornerstone development for both the project and the community.

Building on our successful progress, in the coming year, our team aims to make further strides in:

• Promoting our capability of delivering ethical computing applications to key stakeholders
• Assessing our technical capabilities in the context of emerging genAI technologies
• Enhancing the capability of data accountability and its ease of use for users.
• Informing national and global policies on data autonomy and governance

For further information, please see all our 2024 publications and new code bases.

On November 12, 2024, Sir Tim, together with John Bruce, the co-founder and CEO of Inrupt, had a fireside conversation at the Web Summit 2024, discussing how to make the Web better.

Digital wallets are fast becoming the most compelling way to serve customers and citizens. Over 60% of the world’s population is expected to use digital wallets regularly by 2026. Hear from the inventor of the World Wide Web himself, Sir Tim Berners-Lee, on why this moment is a pivotal opportunity for businesses to embrace change, enhance privacy, and help shape the next era of the web.

The recording is available on Vimeo link.

We are very excited to share that from October 2024, the ODI will bring Solid into its broader data stewardship activities.

The Solid project and protocol have been a core part of the EWADA technical development. This partnership means that all Solid protocols and community will now become part of the ODI’s activities to promote secure, ethical data sharing and build a more transparent, secure, and user-centric data ecosystem.

We are also quite pleased that our DPhil student Jesse Wright will act as the Solid Lead for this partnership, bridging the dialogue between academia, community and innovation.

Read more abou this from the ODI’s blog post.

For more information, contact solid@theodi.org

Led by our PI, Professor Sir Nigel Shadbolt, EWADA team contributed to the Open Data Institute’s landmark report on “Five years Strategy 2023-2028” on a trusted data infrastructure, and their newly updated policy manifesto, published in September 2024.

With the rapid advancement of AI technologies and their growing application in critical public sectors in the UK, such as healthcare and education, the need for a scalable, open, and trustworthy data ecosystem has never been greater. EWADA’s core mission is to empower individuals to take control and derive maximum value from all types of data.

This aligns closely with ODI’s latest policy manifesto, which calls for the following six principles:

• Principle 1: Strong data infrastructure
• Principle 2: Open data as a foundation
• Principle 3: Building trust in data
• Principle 4: Supporting trusted, independent organisations
• Principle 5: Fostering a diverse, equitable, and inclusive data ecosystem
• Principle 6: Enhancing data knowledge and skills

The cutting-edge decentralised data infrastructure and privacy-preserving AI computation capabilities developed by EWADA researchers over the past three years hold immense potential to support the new government’s ambition for a national renewal. Initiatives like “Citizen-Centric Public Services” have the potential to place citizens at the heart of digital service delivery through enhanced data infrastructure for public services and the creation of a new National Data Library. By leveraging innovative technologies and fostering collaboration, EWADA is well-positioned to drive transformative change in the way public services are delivered. Together, we can ensure that data-driven solutions prioritise citizens’ needs, uphold privacy, and pave the way for a more inclusive and efficient digital future.

Professor Sir Nigel Shadbolt and Senior Researcher Dr Jun Zhao are to lead a new project, togeter with UCI and Oxford Philosophy, to address the pressing issue of fostering children’s digital autonomy in societies where childhood has become intricately intertwined with Artificial Intelligence (AI) systems, for instance through connected toys, apps, voice assistants, and online learning platforms.

The two-year project, CHAILD – Children’s Agency In the age of AI: Leveraging InterDisciplinarity, is funded by the first round of UKRI’s new cross research council responsive mode (CRCRM) pilot scheme. The CRCRM scheme has been developed to support emerging ideas from the research community that transcend, combine or significantly span disciplines, to ensure all forms of interdisciplinary research have a home within UKRI. This provides unique opportunities for interdisciplinary research projects like CHAILD.

Find out more about CHAILD.

Led by our first-year DPhil student Jesse Wright, three poster/demo papers were accepted by ISWC 2024. Many congratulations to Jesse and his collaborators!

Jesse Wright. Here’s Charlie! Realising the Semantic Web vision of Agents in the age of LLMs

This paper presents our research towards a near-term future in which legal entities, such as individuals and organisations can entrust semi-autonomous AI-driven agents to carry out online interactions on their behalf. The author’s research concerns the development of semi-autonomous Web agents, which consult users if and only if the system does not have sufficient context or confidence to proceed working autonomously. This creates a user-agent dialogue that allows the user to teach the agent about the information sources they trust, their data-sharing preferences, and their decision-making preferences. Ultimately, this enables the user to maximise control over their data and decisions while retaining the convenience of using agents, including those driven by LLMs.

In view of developing near-term solutions, the research seeks to answer the question: “How do we build a trustworthy and reliable network of semi-autonomous agents which represent individuals and organisations on the Web?”. After identifying key requirements, the paper presents a demo for a sample use case of a generic personal assistant. This is implemented using (Notation3) rules to enforce safety guarantees around belief, data sharing and data usage and LLMs to allow natural language interaction with users and serendipitous dialogues between software agents.

Here’s Charlie can be found at arxiv.

Jesse Wright, Jos De Roo and Ieben Smessaert. EYE JS: A client-side reasoning engine supporting Notation3, RDF Surfaces and RDF Lingua

The Web is transitioning away from centralised services to a re-emergent decentralised platform. This movement generates demand for infrastructure that hides the complexities of decentralisation so that Web developers can easily create rich applications for the next generation of the internet.

This paper introduces EYE JS, an RDFJS-compliant TypeScript library that supports reasoning using Notation3 and RDF Surfaces from browsers and NodeJS.

By developing EYE JS, we fill a gap in existing research and infrastructure, creating a reasoning engine for the Resource Description Framework (RDF) that can reason over decentralised documents in a Web client.

Jesse Wright. N3.js Reasoner: Implementing reasoning in N3.js

In addition, Jesse had the following paper accepted by Semantics 2024 NeXt-generation Data Governance workshop 2024.

Jesse Wright, Rui Zhao, Beatriz Esteves. Me want cookie! Towards automated and transparent data governance on the Web

This paper presents a sociotechnical vision for managing personal data, including cookies, within Web browsers. We first present our vision for a future of semi-automated data governance on the Web, using policy languages to describe data terms of use, and having browsers act on behalf of users to enact policy-based controls. Then, we present an overview of the technical research required to prove that existing policy languages express a sufficient range of concepts for describing cookie policies on the Web today. We view this work as a stepping stone towards a future of semi-automated data governance at Web-scale, which in the long term will also be used by next-generation Web technologies such as Web agents and Solid.

This paper can be found at arxiv.