Abstract
ABSTRACTWith the evolution of traditional power grids into smart grids, utilities alone cannot yet provide all electricity services and thus third-party service providers (SPs) are required to help in service provision. Therefore, it is critical to secure third-party service provisions in smart grids. In particular, authentication is required to be done in the first place. However, authentication for multiple third-party SPs has not been well studied in smart grids. In this paper, we model the third-party service provision in smart grids for the first time which can capture specific cyber security threats with the existence of multiple third-party SPs. Furthermore, we propose an efficient authentication scheme for multiple third-party SPs. Security analysis shows that our scheme can achieve multiserver authentication, conditional anonymity, and other important security goals. Performance evaluation demonstrates that our scheme is well suited for smart meters (SMs) with limited resources, and each user only needs to do one registration for multiple SPs thus it has low communication overhead.
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