Abstract
The fourth industrial revolution is often labeled as Industry 4.0 and is considered the age of sophisticated innovations that will pave the way for drastic industrial changes. These machineries include the state-of-the-art concepts, M2M communications, Artificial Intelligence (AI), cloud computing, and the Internet of Things (IoT). The heart of the fourth industrial revolution is the internet of things (IoT) which is referred as the industrial internet of things (IIoT). It plays a crucial role in providing smart solutions and automation processes to inspire the industry and help in terms of high productivity. This paper reviews the importance of cybersecurity in the fourth industrial revolution as a key context of ItoT. We find that in Industry 4.0, IoT and other computer devices have many security vulnerabilities, and a secure tray is required to resolve these threats. In this paper, we emphasis to discuss challenges towards vulnerabilities and optimized block chain technology in Industry 4.0 which can offer an effective solution to these cybersecurity issues. Moreover, this empirical survey highlights potential threats, vulnerabilities, security, and privacy, followed with optimized discussion.