Blockchain based authentication and access control protocol for IoT

The integration of various advancements, ongoing management, intellectual capacity, item sensors, and incorporated frameworks have all contributed to idea behind the internet of things. Due to the energy limitations of the majority of Internet of Things (IoT) devices, more and more developers are choosing to create IoT systems based on group communication. A safe and reliable authenticated group secret key is essential for complete group communication in these applications. As the resource-constrained character and widespread use of the Internet of Things (IoT) provide a significant problem for IoT application security. In this paper, using elliptic curve and bi-linear paring, we provide a Blockchain based lightweight authenticated key agreement and access control protocol for group communication. We also proved the secrecy of the protocol in the random-oracle paradigm and give a thorough heuristic security assessment to verify that our protocol is safe from all possible threats and offers the required security features. Furthermore, functional implementation using NS-3 simulation expose that presented protocol is applicable for real-life IoT environments.