A privacy-preserving multidimensional data aggregation scheme with secure query processing for smart grid

A smart meter is a critical component of the smart grid that collects data and reports to electricity companies in several minutes or seconds. The real-time power consumption of smart meters helps electricity companies to provide reliable services but can expose smart meter customers' privacy. Therefore, aggregation of encrypted power consumption of smart meters is used to protect privacy. To meet the requirements, we propose a Privacy-Preserving Multidimensional Data Aggregation (PP-MDA) scheme for smart grid. Paillier cryptosystem is used to aggregate the encrypted power consumption at the fog and cloud sites. In addition to aggregation, PP-MDA scheme is also used for secure query processing; ID-based and time-based. Simulation results show the superiority of the PP-MDA scheme with existing solutions in terms of communication cost and features.