Blockchain-based Security Framework for IoT Devices in Industrial Automation: A Comprehensive Review

The widespread use of industrial automation Internet of Things (IoT) devices has seen great transformation in operational efficiency and decision-making. But these interconnected environments have nevertheless raised a major concern about their security challenges. Blockchain technology is a promising solution to the challenges of infrastructure because of its decentralized, transparent and tamper proof characteristics. We discuss in this paper how blockchain based security frameworks are being used in IoT devices for industrial automation right now. It first conducts an in depth analysis of existing approaches and their pros and cons before concluding with research gaps. In addition, it explores integration of blockchain with involving technologies for IIoT ecosystems’ security.