VC-DCPS: Verifiable Cross-Domain Data Collection and Privacy-Persevering Sharing Scheme Based on Lattice in Blockchain-Enhanced Smart Grids

Abstract

With the advent of the era of Industry 4.0, blockchain-enhanced Smart Grids have received widespread attention from academics and industry personnel, with its great advantages in high transparency, flexibility and decentralization. However, there are still problems of privacy leakage and inefficiency. In this paper, we propose a cross-domain verifiable data collection and privacy-persevering sharing scheme based on lattice in blockchain-enhanced Smart Grids, called VC-DCPS. Firstly, lattice-based homomorphic encryption and spatial-temporal aggregation technology are utilized to enable cross-domain collection of data, dynamic addition and deletion of users and improvement of efficiency. Secondly, a post-verification method is designed to verify whether the outsourcing cloud executes predetermined operations correctly. Using consensus and incentive mechanisms via smart contract will enable flexible access control and efficient transactions on the blockchain. In addition, formal security analysis shows that the proposed scheme can ensure privacy and enhance security. Finally, performance evaluation and experimental comparison are performed and turn out that the proposed scheme is strong security, high efficiency and low storage overhead.