Lightweight and Pair-free Certificate-Based Data Aggregation for Smart Grid

With the groundswell of digital and computerized equipment and technology, smart grids have received widespread attention as a method that can be relied on. Smart grids can transform a house into a home area networks, connecting multiple smart devices and appliances to the electricity control centers. However, the privacy and security of the user’s data is critical because the data from smart grids may expose users’ lifestyle habits. To solve this problem, a large number of data aggregation schemes based on public-key or identities have been presented, however, most of them have been shown to be complicated by certificate management or key escrow issues. To overcome the above problem, we construct a secure and lightweight certificate-based data aggregation (CB-DA) scheme in this work. It not only is proven secure but also avoids time-consuming pairing. Finally, our security analysis shows that the proposed scheme is secure.