A Blockchain Based Decentralized Authentication Framework for Resource Constrained IOT devices

Internet of Things (IoT) is excessively influencing our day to day lives in many domains be it small smart device like a smart-watch or large industrial enterprises. Thus, a number of different IoT based applications are developed and deployed for these sectors. An IoT system enables devices to communicate among each other without human assistance/involvement. Therefore, verifying the authenticity of devices and ensuring integrity of the communicated messages should be given major importance in this type of autonomous systems. Apart from this, it is almost impractical to develop a centralized authentication scheme for a system whose size growing day by day. For this reason, a decentralized framework based on Blockchain technology that can efficiently manage such a large number of smart devices has been proposed in this paper. An authentication scheme using which devices as well as end users can prove their legitimacy to each other is also designed.