Research On Privacy Protection Of User Information In Smart Grid

Smart grid is a new generation of power system formed by using advanced science and technology on the basis of traditional power grid.The electric energy it provides to users is highly efficient,clean and environmentally friendly,and meets the needs of society and people’s needs for life.However,with the massive deployment of smart devices,user information security issues have become more prominent.First,if the user’s identity information is leaked,the attacker can illegally obtain the user’s password and other private information through big data analysis and other means;second,once the user’s location information is stolen during transmission,the attacker may directly obtain the user’s residence Location will cause unpredictable consequences.Finally,power transmission flows in both directions in the smart grid.If the power data is stolen,it will cause the leakage of privacy data such as the user’s living habits,and even cause great harm.By analyzing key technologies such as certificateless signcryption,homomorphic encryption,and broadcast encryption,this paper proposes three research plans for privacy protection of user information in a smart grid environment.The main tasks are as follows:(1)A privacy protection scheme for the identity information of smart grid users is proposed.The solution realizes the hiding of the user’s identity through the improvement of the unsigncryption process in the certificateless signcryption system.Different means are used for identity authentication before and after the unsigncryption process.The scheme not only prevents attackers from tampering,but also achieves the purpose of protecting the privacy of user identity information.Through analysis,the solution satisfies the indistinguishability under the adaptive selection ciphertext attack.(2)A privacy protection scheme for the location information of smart grid users is proposed.The use of homomorphic encryption technology protects the user’s location information and builds a virtual aggregation without relying on third parties.The analysis results show that the scheme has high efficiency and security,and can resist collusion attacks and differential attacks.(3)Propose a privacy protection scheme for smart grid users’ electricity consumption information.After the grid user sends the power data to the gateway,the gateway will verify their signatures one by one,and use aggregation technology for batch verification,which reduces the amount of calculation for the gateway;and the control center cannot obtain the individual user’s data when receiving the aggregated data sent by the gateway.Data content.The broadcast encryption technology is adopted to ensure the legitimacy of users by establishing a set of legitimate users.Once a malicious user is found,the revocation mechanism is immediately activated and a new set of users is generated.Security analysis shows that the scheme can satisfy the unforgeability,indistinguishability and confidentiality of ciphertext.