Blockchain-Based Medical Data Sharing | #sciencefather #scientistaward #database #Blockchain #MedicalRecords #DataSecurity

Secure and Efficient Medical Record Sharing for Pandemic Response Using ChainMaker Blockchain

Introduction to the Problem Space

Large-scale pandemics like COVID-19 demand centralized patient treatment and rapid data sharing. However, conventional systems fail to balance performance, privacy, and efficiency. Patient medical records shared during emergencies are often vulnerable to breaches, raising ethical and regulatory concerns.


Technological Foundations of the Proposed System

ChainMaker offers high throughput (up to 240M TPS) and post-quantum security, ideal for high-load medical applications. IPFS supports decentralized storage with resilience and reliability. TBFT ensures strong consensus without PoW, while SM2 adds ECC-based, government-backed security for data and identity protection.

Key Cryptographic Mechanisms

C-PRE enables re-encryption under preset conditions (e.g., time-based access), allowing patients to define when and how their records are shared. ASE lets encrypted data be queried without decryption, ensuring privacy while enabling real-time access by authorized entities.

System Architecture Overview

The system architecture involves eight collaborating entities, including treatment centers and medical institutions. Through smart contracts and identity verification, data sharing is managed securely and efficiently. Message queues buffer request overloads, ensuring stable system operation even during surges.

Workflow Scenarios

Upon patient diagnosis, encrypted records are stored in IPFS. Treatment centers request access through query clients. The patient generates authorization keys and trapdoors, enabling secure, temporary access to their data by the treatment center via blockchain-verifiable smart contracts.

Performance and Security Advantages

Unlike existing blockchain-based health record systems relying on Fabric’s PBFT, which suffers under heavy loads, this system leverages ChainMaker’s TBFT for superior scalability and performance. By separating storage (IPFS) and verification (blockchain), the framework ensures fast, secure, and resilient data access.

Comparative Analysis with Related Work

Prior solutions often suffer from low throughput, inefficient index structures, and reliance on trusted third parties. This scheme eliminates those limitations by fusing blockchain, distributed storage, and advanced cryptographic methods into a unified, privacy-preserving, and high-performance framework.

Conclusion 

The proposed system is highly suitable for pandemic-scale deployments, supporting massive concurrent data requests with minimal latency and strong data protection. Future expansions may explore AI-based triage integration, multi-language smart contract support, or federated data exchange across borders.

#BlockchainHealthcare  #MedicalDataSharing  #ChainMaker  #IPFS  #SearchableEncryption  #ConditionalProxyReEncryption  #SM2Encryption  #PandemicResponse  #DataPrivacy  #eHealthSecurity  #TBFTConsensus  #SmartContracts 

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