Research On Privacy-preserving Aggregation Scheme Of User-side Metering Data In Smart Grid

Smart gird is a new generation of power system,which significantly improves the efficiency,reliability and sustainability of power service.However,the issue of privacy information leakage of users in smart grid is becoming increasingly prominent.In industrial smart grid,real-time user-side metering data may be frequently collected for monitoring and controlling electricity consumption,which will lead to the users’ sensitive information leakage,posing a great threat to user privacy and smart grid security and stability.To address this problem,this paper mainly contributes the following aspects:We construct an identity-based metering data aggregation(MDA)scheme,which based on the security risks and security demand of the metering data at the smart meter side.In order to ensure the privacy at user-side,we utilize asymmetric encryption algorithm to encrypt the dynamic electricity data.Collector can aggregate the ciphertext received without compromising the confidentiality to ensure the integrity of the metering data.At the same time,the scheme supports the collector and the electricity service provider in performing batch verification to improve the verification efficiency.Theoretical analysis shows that the MDA scheme is provably safe under the random oracle,and meets the privacy and security requirements of user-side data.Experimental results show that this scheme has higher computational advantages and communication efficiency than the similar schemes.Also,we provide a secure data aggregation(SDA)scheme,which not only guarantees the security of the dynamic metering data,but also supports third-party arbitration.The third-party is responsible for solving and arbitrating the data disputes between smart meters and electricity service provider,through re-verification and re-decryption of the aggregated ciphertext package.Besides,it is rightful for collector,electricity service provider and third-party to conduct batch validation,so as to improve the efficiency of the network.Theoretical analysis present that the SDA scheme provides privacy guarantee for the metering data at user-side.Furthermore,efficiency comparison present that this scheme has higher computational efficiency compared with similar solution and meets the practical application requirements.