Review on Blockchain contribution to the Internet of Things

Abstract

The Internet of Things became widely popular as a technology with the start of the fourth industrial revolution. IoT operates to gather confidential information remotely via a network of devices. IoT systems gather a huge amount of important and confidential information, often shared with external organizations for useful services. But such devices can be easily hacked, and the protection of these devices is therefore critical when IoT scenarios are implemented. Blockchain is a promising new framework to solve security and IoT trust challenges. This paper offers a summary of existing blockchain solutions for IoT networks. At first, it define the terms IoT and Blockchain and review current surveys dealing with blockchain technology implementations in IoT networks. Then, included a general overview of IoT architecture, classification of specific IoT attacks, and blockchain architecture. Moreover, This paper provide a taxonomy of state-of-the-art methods for stable and privacy-preserving IoT network blockchain applications in relation to the blockchain framework, basic security requirements, efficiency, constraints, machine complexity and communication overhead. Based on the present study, we stress the open barriers of research and potential future work directions in blockchain IoT technologies.