A Study Of Data Collection And Cross-Domain Authentication In Smart Grid

In recent years, the research and development of smart grid has been widely studied. As the next generation of power grid, smart grid combines traditional grid with information and control technologies. Smart grid can realize the two-way transmission in power and information, which can achieve that the data transmission and information control are high in speed and sample parameters and parameters analysis are in real time. However, frequent data collection meets real-time management, but which tends to raise privacy concerns from the users about privacy information leakage. Therefore, privacy protection is an important security requirement in smart grid.Vehicle-to-grid networks are important components of the smart grid(SG), which can provide better ancillary services and promote the adoption of renewable resources. In V2 G networks, the communications between battery vehicles(BVs) and power grid may confront severe cyber security vulnerabilities. In order to obtain the efficiency of the communication, identity authentication has becoming an important security requirement in V2 G networks.This dissertation is mainly concerned with how to design the schemes of data collection in smart grid and identity authentication in V2 G networks. The author’s major contributions are outlined as follows:1. Firstly, an efficient and privacy-preserving collection scheme for smart grid is proposed according to privacy-preserving security requirement. The users’ privacy protection is achieved by using the blind signature technique and the key distribution technique. Furthermore, performance analysis shows that the scheme not only provides privacy-preserving, but also has less computation cost than existing schemes.2. According to the identity authentication security requirement, a cross-domain authentication scheme is proposed. Firstly, according to the characteristics of the group members, the system model of the cross-domain authentication scheme is designed. Then we utilize the group blind signature technique to ensure that BVs can be authenticated without disclosing their real identities and routes that they travel. In addition, we perform comprehensive security analysis, which shows that cross-domain authentication scheme achieves both privacy preservation and mutual authentication.