Authentication in IoT devices using blockchain technology: A review

The Internet of Things (IoT) is a concept that is transforming our everyday life. Because of its capacity to change people's lives, it has become a vital element of our lives. IoT devices are being used by an increasing number of businesses because they provide new opportunities for wearable devices, home appliances, and healthcare. With all of these possibilities, the risks associated with IoT security are increasing. One of the most challenging aspects of any IoT application is device identification. Things in the IoT share and process data without the need for human interaction. As a result of their total authority, these entities must authenticate and recognize one another effectively. Failure to legitimately authenticating the IoT devices can make them vulnerable to a number of assaults such as DDoS and replay attacks. It is nearly hard to develop an effective authentication system due to the size and other characteristics of IoT. Although a lot of work has been done on this issue, the majority of these solutions rely on a centralized system. These centralized systems are segregated and incompatible with one another, making information exchange between them impossible. In addition, once a centralized authority is attacked, the user's privacy can be exposed easily. Proof of security, decentralization, and anonymity characteristics of blockchain can help address these issues. With blockchain technology applied to IoT systems, obstacles to IoT architecture development and security can be overcome. This paper, therefore, focuses on covering current advancements made in the application of blockchain for authentication in IoT. There is a lack of survey papers on the use of blockchain for authentication in IoT this paper will serve as an aide. This paper will also add to the knowledge of researchers who are interested in IoT security.