A Blockchain-Based Secure Key Management Scheme With Trustworthiness in DWSNs

Dynamic wireless sensor networks (DWSNs) as an important means of industrial data collection are a key part of industrial Internet of Things (IIoT), where security and reliability are important characteristics of trustworthiness. However, due to dynamics, the security of key management is caused by a nontrusted base station (BS) that is easily targeted. For the distribution key management scheme, the avianized BS also causes additional and heavy overhead on sensors. To tackle these issues, in this article, we propose a blockchain-based secure key management scheme (BC-EKM). First, stake blockchain is constructed based on the hybrid sensor network. In addition, we design a secure cluster formation algorithm and a secure node movement algorithm to implement key management, where stake blockchain as a trust machine replaces the majority functions of the BS. Finally, we conduct the security analysis and ample simulations. The results indicate that that the BC-EKM scheme is effective and efficient, and better suited to improve the trustworthiness of DWSNs in the IIoT.