Blockchain and Quantum Cryptography-Based Hybrid Security for Healthcare 5.0 Systems

Healthcare systems can be simplified and enhanced by integrating digital databases and insurance agencies. However, as healthcare data increasingly travels over the internet, concerns around security and privacy-such as data breaches and unauthorized data modifications-become more pressing. The General Data Protection Regulation (GDPR) highlights the importance of secure data management in building trust in the protection of individuals' personal information. Blockchain technology presents an opportunity to make healthcare systems more efficient, secure, and private. This paper examines current security architectures designed to protect electronic health records (EHRs) and proposes the addition of Quantum Cryptography (QC) to reinforce traditional encryption methods. We explore blockchain-based healthcare architectures that integrate role-based access controls and quantum blind signatures within Hyperledger Fabric blockchains. Our findings demonstrate that the proposed framework outperforms existing systems in transaction handling, resource efficiency, and network traffic management while also enhancing scalability and reducing latency.