关键词: 智能电网数据聚合, 同态加密, 差分隐私, 隐私保护, 安全

Abstract: The secure communication architecture in the smart grid is the basis for ensuring the security and stable operation of the power grid. Privacy protection data aggregation is an effective way to ensure confidentiality and to improve efficiency. This paper summarizes and analyzes the five functional types of data aggregation schemes that have recently been geared toward smart grid communication systems. In the aggregation phase, most of the solutions are basically the same in terms of system architecture, but they have different considerations in the selection of aggregation methods. For example, Paillier encryption system and ElGamal encryption system are two kinds of more conventional encryption systems. Differential privacy, bilinear pairing technology and data signature technology are also applied in some articles. The security analysis proves that these solutions not only have the functions of privacy protection, message authentication, and integrity verification; but also through the comparative analysis of the performance of these solutions, the above-mentioned solutions are in terms of computational overhead and user access control and communication overhead. Each has its own advantages and provides more reference for the collection of multi-dimensional data in the smart grid and cloud access control.

Key words: smart grid data aggregation, homomorphic encryption, differential privacy, privacy protection, security