A secure and efficient data sharing scheme based on blockchain in industrial Internet of Things

Blockchain possesses potential for enabling secure data sharing of industrial big data generated by the Industrial Internet of Things (IIoT). However, the existing data-sharing schemes based on blockchain secure only the data exchange process between the data-sharing parties; they do not consider the efficiency of data sharing at all. In this study, we propose a data-sharing scheme based on blockchain that comprehensively considers the security and efficiency of data sharing. In this scheme, a secure data-sharing framework is designed based on identity authentication and Hyperledger Fabric to ensure the security of data sharing. We also propose a community detection algorithm to divide the clients into different data-sharing communities according to the similarity of label data. The scope of data sharing is selected according to the results of the community detection evaluated by the sharing degree, which can effectively narrow the scope of query-shared data and improve the efficiency of data sharing. The experimental results show that the proposed scheme is effective for secure and efficient data sharing among different clients.