Blockchain-enabled Access Control with Fog Nodes for Independent IoTs

Internet of Things (IoT) devices is being conveyed at an enormous scope, with many experts predicting the deployment of 500 billion devices by 2030. Because the IoT devices have limited capabilities and are being deployed in a large amount shortly, current traditional IoT platforms may not be able to handle access control effectively in terms of scalability, reliability, and real-time response. On the other hand, with the advancement of blockchain technology, edge computing, and role-based IoT networks, we can produce a secure access control scheme in a distributed manner with higher reliability, scalability, and real-time response. Therefore, we proposed a decentralized IoT access control system based on blockchain, fog nodes, and the role of things utilizing Ethereum smart contracts for secure device-to-device access. The paper presents overall platform architecture, use case scenarios, crucial evaluation results identified with security analyses, and implementation of the proposed work.