Blockchain-Based Healthcare Data System
Objective: Enable secure, decentralized sharing of patient health records while maintaining HIPAA compliance.
Tech Stack
Blockchain
- Ethereum
- Solidity
- Web3.js
- IPFS
Backend & Frontend
- Node.js
- React.js
- Express.js
- MongoDB (for off-chain data)
Security
- AES-256 encryption
- RSA public-key cryptography
- SHA-3 hashing
- JWT authentication
System Architecture
- Smart Contracts:
- Role-based access control
- Data access logging
- Consent management
- Key management
- Record indexing
- Storage Layer:
- IPFS for distributed storage
- Encrypted medical records
- Cryptographic proofs
- Access logs
- Audit trails
Key Features
- Access Control:
- Role-based permissions (patients, doctors, insurers)
- Granular data sharing controls
- Temporary access grants
- Emergency access protocols
- Security:
- End-to-end encryption
- Zero-knowledge proofs
- Secure key management
- Tamper-proof audit logs
- Data Management:
- Medical record versioning
- Structured data formats
- Real-time updates
- Search functionality
Technical Implementation
- Hybrid encryption system (AES + RSA)
- Smart contract-based access control
- IPFS content addressing
- Off-chain data indexing
- Real-time event notifications
Performance & Scalability
- Sub-second data retrieval
- Support for large medical files
- Optimized gas consumption
- Horizontal scaling capability
- High availability design
Compliance & Standards
- HIPAA compliance
- HL7 FHIR compatibility
- GDPR considerations
- Industry best practices
- Regular security audits
Impact & Applications
- Enhanced patient data security
- Improved healthcare interoperability
- Efficient medical history sharing
- Reduced data breach risks
- Transparent audit trails
Future Development
- Cross-chain interoperability
- AI-powered analytics
- Mobile app development
- IoT device integration
- International standards compliance