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Blockchain-based healthcare management system with two-side verifiability.
Tian Lim Tan1, Iftekhar Salam1, Madhusudan Singh2
1School of Computing and Data Science, Xiamen University Malaysia, Sepang, Selangor, Malaysia.
Plos One
|April 14, 2022
Summary
This study introduces a secure, decentralized system for electronic health records (EHRs) using blockchain and searchable encryption. It ensures data confidentiality and accessibility while enabling auditable and immutable storage for healthcare management.
Area of Science:
- Health Informatics
- Cybersecurity
- Blockchain Technology
Background:
- Healthcare management systems face challenges with data outsourcing, hindering intercommunication and information sharing.
- Cloud service providers (CSPs) offer a solution for electronic health record (EHR) outsourcing, but security and trust remain concerns.
- Existing searchable encryption solutions often rely on centralized architectures, introducing trust issues with CSPs.
Purpose of the Study:
- To propose a decentralized system for secure EHR storage and retrieval using blockchain and smart contracts.
- To address the limitations of centralized searchable encryption in healthcare by enhancing security, auditability, and immutability.
- To develop a practical and secure solution for outsourced EHRs that maintains data confidentiality without compromising functionality.
Main Methods:
- A novel blockchain-based searchable encryption scheme was designed for decentralized EHR storage and updates.
- The scheme integrates smart contracts on the Ethereum platform for auditable and immutable data management.
- A prototype was implemented using JavaScript and Solidity to demonstrate the system's feasibility.
Main Results:
- The proposed scheme ensures confidentiality of outsourced EHRs while supporting keyword search functionalities.
- It provides verifiability for users and servers, along with immutable storage and dynamic EHR updates.
- Performance and security comparisons indicate the scheme is practical and meets security and functional requirements.
Conclusions:
- The developed blockchain-based searchable encryption scheme offers a practical and secure solution for decentralized EHR management.
- This approach enhances data confidentiality, accessibility, and integrity in cloud-based healthcare systems.
- The findings support the use of blockchain and smart contracts for building trustworthy and efficient healthcare data management systems.
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