Blockchain-Based Secure Smart Health IoT solution Using RBAC Architecture

The revolution of Internet technology, which led to connecting everything through the World Wide Web, the Internet of Things (IoT) emerged to serve this need. IoT technology connects different devices, hardware, and software together, which are created to provide services and facilitate human life. The most critical application is in the health sector, where data privacy, security, and accessibility are demanding and agonizing challenges. In this paper, we use a block chain (BC) model that enforces the Role-Based Access Control (RBAC) model to address privacy and security concerns as well as the limited nature of IoT devices. The paper's concept is to divide the network according to the assigned role, and authentication and data transfer are thoroughly discussed. The Architecture of the proposed system is shown and displayed in flowcharts, where each node has different permissions and privileges. In the experimental part, two scenarios are applied; one where the network (IoT devices) is connected through an MQTT broker as an intermediary, and the second with BC that controls the IoT, which uses proof of assignment as a consensus model. The data flow shows that with BC, the network is much more secure and holds the privacy and integrity of the data.