POC Demonstration Report: Interconnect Data Provider
and Data User

The document reports on a Proof of Concept (POC) demonstration validating the technical feasibility of interconnecting a Data Provider and a Data User within the Dataspace4Health (DS4H) project, focusing on synthetic colorectal cancer data. The demonstration included identity management, verifiable credential issuance, wallet integration, cryptographic signing, and data offering publication.

• Project overview: DS4H aims to create a sovereign health data space in Luxembourg targeting diabetes and oncology, with this report focusing on the oncology use case and synthetic patient data structured using the OncoBox model.
  

• Technical infrastructure: The system aligns with Gaia-X Tagus ontology standards, utilizing Keycloak-based Identity and Access Management (IAM), a Federated Catalogue for metadata, and exchanges data through Verifiable Presentations (VP) and Verifiable Credentials(VC).
  

• User creation: Legal Participant administrators created user accounts for individuals affiliated with their entity using the LIH IAM system, successfully establishing two user accounts.
  

• Verifiable Credential issuance: Digital identity credentials were issued to users by the Legal Participant admin via the LIH admin console using the OIDC4CI protocol, resulting in a QR code for credential transfer.
  

• Mobile wallet integration: Users stored their Natural Person VC in a mobile wallet by signing in and scanning the QR code, successfully transferring and storing the credential.
  

• Cryptographic signature: The Data Provider manually signed a Verifiable Presentation bundling four VCs, including Legal Participant and Service Offering credentials, using an offline tool, creating a signed VP.
  

• Data offering publication: The signed VP was published in the Federated Catalogue after appropriate permissions, making the OncoBox colorectal cancer data discoverable following user authentication via SSI.