Privacy-Preserving of Electricity Data Based on Group Signature and Homomorphic Encryption

Abstract

Smart grid is a highly integrated power system, which combines modern advanced information communication, sensor measurement and automatic control technology, including a large number of smart devices, with the advantages of reliability, reliability, safety and self-healing, providing a great service. However, when collecting, processing, and transmitting large amounts of data, devices such as smart dashboards in the network face the problem of discovering user-specific issues. In order to solve this problem, a scheme based on improved group signature and homomorphic encryption is proposed here. The improved group signature is used to determine the public and private keys of the smart meter and the signature of the electricity consumption data, and the homomorphic encryption is used for the electricity consumption. Data is encrypted and aggregated. In the end, the electricity consumption data is always in cipher text during the data transmission process. The forward-secure group signature scheme can avoid the harm caused by the interference of the private key, thus realizing the protection effect.