A Privacy Protection And Integrity Authentication Scheme For Data Aggregation In Smart Grid

In recent years,with the continuous popularity of smart grid,the security issues in communication have been paid more and more attention by users.The communication network in smart grid can collect and analyze real-time data,so enterprises and governments can make corresponding decisions based on real-time power data.However,real-time data collection may lead to the disclosure of privacy such as user lifestyle and economic status.To protect the privacy of users and provide decision-making for enterprises and governments in power generation planning and dynamic pricing,the method of data aggregation with encryption tools has been extensively studied.Privacy protection data aggregation technology not only retains the statistical characteristics similar to the original power consumption data,but also hides the individual power consumption of users.Based on the limited computing power and privacy requirements of smart meters in the smart grid,this paper designs an efficient privacy-friendly data aggregation scheme.The scheme combines symmetric encryption and one-way safe hash function,and broadcasts aggregate information for a specified period of time to all smart meters through PS,which can improve computing efficiency and reduce communication costs.In a given period of time Iu,it is assumed that ?'u represents a collection of smart meters that perform legal operations.PS and TPA update the group key of ?'u in time intervals,and the system performs data aggregation operations in rounds.According to the actual application network environment,adopt appropriate methods to divide the time period and plan the number of rounds in each time period,which can achieve better security and lower communication cost.Finally,the improved scheme is analyzed and evaluated from security analysis,formal certification and performance analysis,and the feasibility of the scheme is verified under IDEA platform.Relevant analysis results show that the improved scheme not only achieves mutual authentication and secure data transmission among participants,but also improves the reduction of computational and traffic.