Storage-Saving Bi-Dimensional Privacy-Preserving Data Aggregation in Smart Grids

Storage-Saving Bi-Dimensional Privacy-Preserving Data Aggregation in Smart Grids

Recently, lots of works on power consumption data aggregation have been proposed for the privacypreservation of users against the operation center in smart grids. This is the user-based data aggregation, which accumulates the power consumption data of a group of users for every time unit. On the other hand, the accumulation of a user’s data in a group of time units will facilitate the queries on the user’s accumulated power usage in these specified time units, which is time-based data aggregation. It enables the operation center to perform individual energy consumption statistics and management and offer customized services. If a data aggregation scheme provides both user-based and timebased data aggregation, it is said to be it bi-dimensional. This manuscript presents the first privacy-preserving bidimensional data aggregation scheme, where the storage cost only linearly increases with the number of time units and is independent of the number of users.