Patient-Centric Data Security: A Blockchain and CASB Approach for Remote Healthcare
Anneboina Krishna, Nair Rahul, Himaja Nounuri, K. Sravan Kumar, K. Tharun · International Journal of Research Publication and Reviews · 2025
Remote healthcare monitoring, powered by IoT devices, offers vital support to patients unable to access clinical environments regularly.However, safeguarding the integrity and confidentiality of health data remains a critical challenge-especially against insider threats.Unlike external attackers, malicious insiders often have privileged access, enabling them to manipulate, erase, or exploit patient records without detection.Conventional audit logs stored in centralized cloud systems are insufficient, as they can also be tampered with by those same insiders.This research presents a novel solution that integrates a Cloud Access Security Broker (CASB) with a private blockchain network to create an immutable and transparent log management system.Every interaction with patient data-whether initiated by users or administrators-is recorded in a tamper-proof blockchain ledger accessible to patients through a secure interface.This design empowers data owners with visibility into how their data is used, while preventing unauthorized changes to logs.The implemented system consists of a web platform for health data collection, a CASB for secure access control and cloud storage, and a permissioned blockchain for real-time action logging.Performance and security evaluations confirm the system's resilience, low latency under load, and ability to deter insider attacks through cryptographic accountability.This architecture lays the foundation for trust-centric remote healthcare systems where patient data security is verifiable, enforceable, and decentralized.