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Technical Design and Development of A Self-Sovereign Identity Management Platform for Patient-Centric Health Care

Daniel Toshio Harrell1, Muhammad Usman2, Ladd Hanson3

  • 1University of Texas at Austin-Dell Medical School, USA.

Blockchain in Healthcare Today
|February 13, 2023
PubMed
Summary

MediLinker offers a blockchain-based patient-centric health identity system. This decentralized approach enhances data security and patient control over personal health information, addressing fragmentation challenges.

Keywords:
blockchain technologydecentralized identifiershealth informationhyperledgerself-sovereign identityverifiable credentials

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Area of Science:

  • Health Informatics
  • Blockchain Technology
  • Cybersecurity

Background:

  • Clinical data in the US is fragmented across disparate databases, hindering patient record aggregation.
  • Lack of a universal patient ID creates significant technological, legal, and operational challenges for data integration.
  • Existing solutions for health data interoperability are often complex, costly, and raise privacy concerns.

Purpose of the Study:

  • To describe the technical design of MediLinker, a patient-centric decentralized health identity management system.
  • To leverage blockchain technology to address challenges in clinical data integration and patient data control.
  • To develop a secure and trusted system for patients to manage and share their health information.

Main Methods:

  • Developed an identity wallet using blockchain technology (Hyperledger Indy and Hyperledger Aries) for managing verifiable credentials.
  • Stored patient Decentralized Identifiers (DIDs) and credential schemas on the blockchain (off-ledger for credentials).
  • Utilized Hyperledger Aries as middleware to connect the blockchain framework with front-end applications (ReactJS and React Native).

Main Results:

  • Implemented MediLinker, enabling users to store personal data in self-controlled digital wallets.
  • Established a decentralized trusted identity system for secure health information sharing with providers.
  • Enabled secure storage and sharing of six credential types, including health ID, insurance, and research consent, with dynamic permission management.

Conclusions:

  • Successfully developed and tested a blockchain-based identity management system architecture.
  • The MediLinker system offers a scalable solution to improve patient experience and control over personal health information.
  • Demonstrated the potential for operationalizing blockchain technology to enhance health data interoperability and security.