Development of a Blockchain-Based Data Security System for Healthcare Records

Thesis Abstract

The security and privacy of healthcare records remain paramount concerns amidst increasing incidences of data breaches, cyber-attacks, and unauthorized access within digital healthcare systems, thereby undermining patient trust and compromising sensitive information. This study aims to develop a robust, blockchain-based data security system tailored for healthcare records, addressing critical vulnerabilities associated with traditional centralized data storage frameworks. The specific objectives include analyzing existing data security challenges in healthcare, designing an innovative blockchain architecture that ensures data integrity, confidentiality, and traceability, implementing a prototype of the security system, and evaluating its effectiveness compared to conventional methods. Employing a mixed-methods research design, the study integrates qualitative and quantitative approaches to comprehensively assess the proposed solution. The qualitative phase encompasses thematic analysis of interviews and focus group discussions with healthcare IT professionals, policymakers, and cybersecurity experts, to identify current security deficiencies and functional requirements. Quantitatively, a prototype system is developed using Hyperledger Fabric, featuring smart contract integration, cryptographic protocols, and decentralized consensus mechanisms. The empirical evaluation involves a sample of 150 healthcare data administrators and 50 cybersecurity specialists engaging in controlled simulations, wherein system performance is measured through metrics such as transaction latency, data accessibility, security breach resistance, and scalability. Data collected through structured questionnaires, system logs, and performance testing tools are analyzed via statistical techniques including regression analysis and ANOVA, complemented by thematic analysis for qualitative insights. The anticipated findings suggest that the blockchain-based system significantly enhances data security, minimizes unauthorized access, and improves auditability compared to existing centralized models. The study expects to demonstrate that blockchain technology can effectively mitigate prevalent vulnerabilities such as data tampering, duplication, and loss, thereby fostering greater trust among stakeholders and ensuring compliance with data protection regulations. This research contributes to knowledge by offering a comprehensive framework for integrating blockchain solutions into healthcare data management, addressing existing gaps in the literature regarding scalability, interoperability, and usability of blockchain in real-world health systems. The findings will inform best practices, guide policymaking, and inspire novel applications of distributed ledger technology in health informatics. The study concludes that a blockchain-driven approach is a viable and scalable alternative to conventional security mechanisms, emphasizing the need for further technological refinement and wider adoption. Recommendations include the development of standardized protocols for blockchain integration with electronic health records (EHR) systems, capacity building for healthcare professionals, and continuous evaluation of system performance in diverse healthcare settings. Finally, future research should explore aspects such as blockchain interoperability across different health information systems, patient-centered control mechanisms, and long-term data sustainability. This thesis affirms that leveraging blockchain technology can significantly advance healthcare cybersecurity, contributing to safer, more transparent, and patient-centric data management practices.