A Review of Secure IoT Based Smart Health Monitoring System using Blockchain Technique

The integration of the Internet of Things (IoT) with blockchain technology is significantly transforming smart health monitoring systems. IoT enables the seamless collection of health data, while blockchain's decentralized ledger ensures the integrity and security of this data, mitigating potential breaches. This symbiosis addresses current healthcare challenges by enhancing security, transparency, and efficiency, fostering a patient-focused and reliable monitoring system. With the rise of the Medical Internet of Things (MIoT), personalized and cost-effective healthcare solutions are more accessible, thanks to technologies like Wireless Body Area Networks (WBAN), which improve data quality, and Machine Learning (ML), which effectively processes large datasets. Fog Computing has been instrumental in ensuring efficient data communication with reduced latency, and advancements in Software-Defined Networking (SDN) and Network Function Virtualization (NFV) offer simpler, adaptable networks for healthcare. However, increased data volume raises privacy and security concerns, propelling a shift towards blockchain for enhanced data protection and transparency. Innovations like blockchain-based federated learning aim to safeguard privacy without compromising model accuracy, and smart contracts on platforms like Hyperledger Fabric provide secure patient history logs and immediate access to medical records. Tools such as the Libelium e-Health toolkit further aim to revolutionize monitoring, diagnosis, and treatment processes.