Abstract
The wireless sensor networks are very vulnerable environments for network attacks, so that they require appropriate security measures must be implemented. The blockchain technology is an effective way of protecting data handled and possessed by the wireless sensor networks. Many of the existing approaches are following conventional security approaches. But such traditional approaches are very prone to failures of the nodes more often. In this paper, a novel efficient approach for authentication in wireless sensor networks that uses blockchain technology for security. The nodes of the wireless sensor networks are from IoT network and they are being formulated by the base station, cluster heads and normal sensor nodes. The building of a blockchain network will shape a hierarchical blockchain model, including small chain and global chain, among various network nodes. Nodes in this hybrid model in different communication situations, identity secure connection is realized, normal node identification user authentication is in the blockchain network, local block chain technology and selected cluster node identification verification is done. Analyzation of the protection and results demonstrate that there is robust protection and higher results in the system. The experimental results are showing that the computational capability of over 300 bytes per phase has been achieved using the proposed approach.