Privacy-Preserving Scheme Based on Group Signature in Smart Grid

Smart grid is a typical cyber-physical fusion system, which combines power system engineering technology and communication information technology. Compared with traditional power grids, smart grids involve more complex interaction processes. The interaction of information poses a certain threat to the privacy of users. However, most of the existing privacy-preserving schemes are not secure and cannot resist internal or external attacks well. In order to solve the existing challenges, this article proposes a privacy-preserving scheme based on group signatures, applying elliptic curve cryptography to ensure user privacy and data integrity and authenticity. We use the ProVerif verification tool to formally analyze and verify the scheme, and compare it with other schemes to prove the safety and correctness of the proposed scheme. At the same time, our solution has good scalability and low computing and storage costs.