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Electronic Health Records Sharing Based on Consortium Blockchain.

Guangfu Wu¹, Haiping Wang², Zi Yang²

¹Department of Information Engineering, Jiangxi University of Science and Technology, Jiangxi, 341000, China. wuguangfu@126.com.

Journal of Medical Systems

|November 18, 2024

Summary

This study proposes a novel consortium blockchain model for secure Electronic Health Records (EHR) sharing. It enhances data security, patient privacy, and interoperability across fragmented healthcare systems.

Keywords:

Consortium blockchain Medical data sharing Practical Byzantine fault tolerance Proxy re-encryption

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Area of Science:

Health Informatics
Blockchain Technology
Data Security

Background:

Electronic Health Records (EHR) systems face challenges due to data silos from different vendors, leading to fragmented medical information.
Difficulties in inter-institutional EHR sharing, privacy leakage risks, and limited patient control over data usage hinder current healthcare services.

Purpose of the Study:

To propose a secure EHR sharing model addressing data fragmentation, privacy concerns, and patient control issues.
To enhance the security, privacy, and operational efficiency of EHR systems through a novel blockchain-based approach.

Main Methods:

A hybrid storage scheme combining Interplanetary File System (IPFS) with consortium blockchain for improved EHR data security and privacy.
Implementation of unidirectional multi-hop conditional proxy re-encryption and distributed key generation for fine-grained EHR access control and traceability.
Development of a dynamic Byzantine fault-tolerant algorithm based on reputation and clustering to optimize consensus efficiency.

Main Results:

The proposed model effectively improves EHR data security, privacy protection, and operational efficiency.
Secure EHR sharing with fine-grained control and traceability of data usage is achieved.
The dynamic Byzantine fault-tolerant algorithm enhances consensus efficiency, addressing limitations of traditional PBFT.

Conclusions:

The consortium blockchain-based EHR sharing model offers a secure, efficient, and privacy-preserving solution for fragmented healthcare data.
The model provides enhanced user control and traceability, addressing key challenges in current EHR systems.
The approach demonstrates reduced communication overhead and time consumption, making it suitable for practical implementation.