SARDIN

The Health data bank consists of a head node and several edge nodes. The head node sends out programs that analyze data in the edge nodes. The edge nodes are controlled by data owners in the regions.

Healthcare providers, researchers, and innovators need to share data, but there is currently no national infrastructure to support this. Individual innovators and researchers face difficulties accessing datasets, scaling projects to include more participants, and applying data-driven methods. At the system level, interoperability between systems and organizations is lacking. Furthermore, current legislation is unclear on how health and social care data can be shared and used for research and development.
The European Commission is preparing a new regulation – the European Health Data Space (EHDS) – to address many of these challenges. SARDIN therefore focuses on:

• How do we build a platform that enables secure use of healthcare data?
• How do we design a solution aligned with future legislation (EHDS)?

Objectives

1. Develop the Health Data Bank platform to meet the identified challenges.
2. Closely monitor EHDS developments to ensure compliance with its recommendations.

The Health Data Bank consists of a network of edge nodes, each controlling how data is used locally or shared. Important legal issues that therefore need to be investigated within the project are when aggregated results can be considered anonymized and what legal basis the use of personal data in research needs to have and how this changes with EHDS.

Challenges and Principles

We will apply core privacy principles:

• Data Minimization – Limit sharing and storage of personal data.
• Purpose Limitation – Use personal data only for explicit, approved purposes.
• Transparency and Accountability – Document all data use and operations for traceability.
• User Empowerment – Individuals control how their data is used.

Proposed Solutions

Examples of solutions to each principle (to be demonstrated in the project):

• Data Minimization – Decentralized analytics sharing only results, not raw data.
• Purpose Limitation – Cryptographic signing of all data processing workflows.
• Transparency and Accountability – Blockchain-based logging of activities and approvals.
• User Empowerment – Data access and withdrawal managed via a personal data wallet.

Events

SARDIN has participated in:

• Vägen mot EHDS, September 2025
• Vitalis, May 2025
• Vinnovas Hälsodatadag 2024, poster see below

SARDIN is funded by Vinnova and is part of the call "System demonstrator for utilization of healthcare data".