Lightweight and Secure Data Sharing Based on Proxy Re-Encryption for Blockchain-Enabled Industrial Internet of Things

In the Industrial Internet of Things (IIoT), data sharing is crucial for promoting the intelligent development of industrial production. To achieve effective data supervision, introducing blockchain into traditional cloud-based data-sharing frameworks has attracted widespread attention. However, existing blockchain-based data-sharing schemes still have issues with security and efficiency. Therefore, we propose a blockchain-enabled data-sharing scheme based on proxy re-encryption. First, the scheme considers both storage and access authentication, guaranteeing data sources’ trustworthiness and preventing data misuse. Second, the scheme uses an on-chain and off-chain cooperative storage mechanism, saving the storage resources of the blockchain. Third, the scheme supports data packing, which effectively improves data storage efficiency. The security analysis shows that our scheme satisfies the security requirements. Finally, we build a blockchain platform using the hyperledger fabric. The performance evaluation shows that our scheme is more advantageous regarding computational overhead than other related schemes.