Decentralizing Privacy-Preserving Data Aggregation Scheme Using Blockchain in Smart Grid

Abstract

As a next-generation power system, the smart grid can implement fine-grained smart metering data collection to optimize energy utilization. In recent years, a large number of privacy-preservation data aggregation schemes have been proposed for smart grid, which relies on trusted third party (TTP) or central authority (CA). If the TTP or CA fails, these schemes become insecure. Therefore, this paper proposes a smart grid data aggregation scheme based on blockchain, which does not rely on TTP or CA and achieves decentralization. In this scheme, the leader election algorithm is used to select a smart meter in the residential area as a mining node to build a block. The node adopts Paillier cryptosystem algorithm to aggregate the user’s electricity consumption data. The confidentiality and integrity of user data are guaranteed, which is convenient for billing and power regulation. Security analysis shows that our scheme meets the security and privacy requirements of smart grid data aggregation. The experimental results show that this scheme is more efficient than existing competing schemes in terms of computation and communication overhead.