Blockchain-Based Data Security Models for Telehealth and Digital Medical Records

Abstract

The rapid global evolution of telehealth and digital medical record systems has reshaped the foundations of modern healthcare delivery. However, these advancements have also introduced unprecedented security, privacy, and interoperability challenges, particularly concerning the management and transmission of sensitive patient data. Traditional centralised databases, while functionally efficient, have proven increasingly vulnerable to cyberattacks, unauthorised access, data leaks, insider manipulation, and system downtime. This research study examines the transformative potential of blockchain technology as a robust and scalable framework capable of enhancing the confidentiality, integrity, authentication, and traceability of telehealth and digital medical record systems. Supported by cryptographic algorithms, decentralised ledgers, smart contracts, distributed consensus models, and immutable data structures, blockchain provides strong mechanisms that align with global data compliance regulations including HIPAA, GDPR, and the Indian DISHA guidelines. The study conducts an in-depth evaluation of blockchain-based security models and contrasts them with conventional security frameworks. A detailed analysis of private, public, hybrid, and consortium blockchain architectures is presented with explicit reference to their applicability in telehealth. Furthermore, the paper proposes an optimised blockchain-enabled telehealth security architecture that incorporates multi-layer encryption, distributed identity management, real-time access control, and tamper-proof medical record   storage. The proposed model is empirically evaluated using a case study involving a telehealth deployment across three healthcare facilities. Data analysis involving cost efficiency, latency, system overhead, and security performance is conducted to demonstrate the practicality and advantages of blockchain in digital health.The findings reveal that blockchain-based telehealth platforms significantly improve trust, transparency, and data resilience compared with traditional systems. Key benefits include enhanced auditability, strong cryptographic assurance, reduced risk of data breaches, and improved patient autonomy over personal health records. The study concludes by highlighting challenges related to scalability, interoperability, energy use, and regulatory constraints, providing recommendations for future research in achieving global blockchain-enabled healthcare integration.