An Efficient and Robust Data Aggregation Scheme Without a Trusted Authority for Smart Grid

Abstract

Secure data aggregation has been widely studied in the area of the smart grid. Many existing schemes have studied protecting user's privacy in data aggregation by using advanced cryptographic tools. However, they usually introduce a large computation burden to smart meters in limited computing power or require a trusted authority. How to ensure the efficiency on the user side while preserving user's privacy still has not been well addressed. In this article, we consider the scenario where there does not exist a trusted authority and users in the smart grid may dynamically change, and propose an efficient and robust data aggregation scheme without a trusted authority for the smart grid. Our proposed scheme not only ensures user's privacy and efficiency but also supports flexible dynamic user management with no need of involving a trusted authority. Analysis of security and performance shows that our scheme can guarantee stronger security features, while ensuring efficiency in terms of computation, communication, and storage overhead.