Design and Implementation of a Secure Centralized Digital Healthcare System for Patient Data Management

This paper presented the design and implementation of a secure, centralized digital healthcare system engineered to replace inefficient paper-based record-keeping with a unified Electronic Health Record (EHR)  architecture.  By  consolidating  patient histories, diagnostic reports, prescriptions, and administrative workflows into a single relational database indexed by a Unique Patient Identifier (UPI), the system eliminates physical document fragmentation and significantly accelerates clinical data retrieval speeds. Furthermore, data privacy and structural security are maintained through the integration of Role-Based Access Control (RBAC), multi-layer encryption (AES-256 and TLS/SSL), and automated audit logging. The proposed framework demonstrates that combining modern software engineering principles with robust security protocols reduces operational bottlenecks, minimizes human error, and provides a scalable foundation for modern digital healthcare infrastructure.

[1]    Hossain, M. S., Al-Aqrabi, A., and Hill, R. (2021). Security and Privacy Challenges in Centralized Health Information Systems. IEEE Access, 9, 34112–34125.     [2]     Prasad, R., and Singh, S. K. (2022). Design and Implementation of Role-Based Access Control in Hospital Management Systems. Proceedings of the IEEE International Conference on Software Engineering in Health Care (SEHC), pp. 88–95.   [3]  Ganeeb, K. K., Jayaram, V., Krishnappa, M. S., Gupta, P., Nagpal, A., Banarse, A. R., and Aarella, S. G. (2024). Advanced encryption techniques for securing data transfer in cloud computing: A comparative analysis of classical and quantum-resistant methods. International Journal of Computer Applications, 186(48), 1–9. doi: 10.5120/ijca2024924135 [4]      Smith, J., Vance, E., and Taylor, D. (2022). Cryptographic Standards for Patient Data Protection: AES-256 vs. Hybrid Encryption Models. IEEE Transactions on Information Technology in Biomedicine, 18(3), 801–809.   [5]     https://www.dre.vanderbilt.edu/~schmidt/PDF/blockc hain-bookchapter-2018.pdf   [6]     Patel, V., and Desai, M. (2023). Centralized Electronic Health Record Architecture for High-Concurrency Hospital Operations. International Journal of Healthcare Information Systems and Informatics (IJHISI), 18(1), 1–18.   [7] https://www.hipaajournal.com/what-is-hipaa-compliance/