Designing Secure Clusters using Blockchain for IoT

Internet of Things(IoT) has become a major component of our lives, where numerous independent devices connect, communicate and interact with one another. It is an evolving technology where devices are intelligent, independent and exchange information with one another without the need for human intervention. Hence these devices must identify, authenticate each other and ensure data integrity and security to avoid being targeted by various malicious attacks. To overcome these limits, a secure decentralized system has been proposed in this work. Here devices can create secure clusters along with security features provided by blockchains, where devices can identify, authenticate and trust each other for data integrity and availability. The implementation of proposed work is done using java and python language and also using ethereum blockchain. Initially, there was only one mode of communication where devices belonging to the same cluster could communicate with each other which are termed as Intra cluster communication. In the proposed system, major focus is on the Inter cluster communication where devices belonging to different clusters can communicate with each other. By using inter cluster communication, the performance and availability of data for the application are enhanced. The results obtained in the proposed work will satisfy the security, efficiency, and low cost needs of the Internet of Things.