The Research On Privacy Of Smart Grid

The smart grid as a new generation of power system,using advanced technology to realize two-way communication.However,the application of new technologies has brought many new problems.With a large number of intelligent terminal equipment of smart meter deployment,user information security problems become more prominent.At the same time with the application of intelligent power grid cloud storage technology,the security threat is also increasing.Through the analysis of user privacy data for smart meters and cloud storage,causing great harm to the safe of the user’s personal privacy and stable operation of smart grid.To conduct a thorough study on the leakage of private data for smart meters in the smart grid user side and cloud storage problems,mainly completed the following work:Firstly,analyzed the privacy data security threats and security needs of the smart grid user side’s smart meter,and proposes a privacy protection scheme based on symmetric cryptography and secure data aggregation,which protects the security of users real-time electricity data by using symmetric encryption algorithm with homomorphic encryption properties.The scheme’s main security features include equipment authentication,data confidentiality and integrity,and through the security data aggregation to achieve the protection of user privacy data;at the same time it uses TRC check circuit to solve the problem of a large threat to smart meters differential fault attack.Then,studied the characteristics of cloud storage and the shortcomings of existing privacy data access control,and presents a smart grid cloud access control scheme based on attribute role.Based on the the CP-ABE scheme,By establishing the privilege role and assigning the attribute set to it,the user can’t obtain the access right directly,but obtains the role through authentication of the attribute set with the privileged role,and then uses the privilege role to decrypt the access structure ciphertext of resource and obtain access to resources.This ensures a logical separation between the user and the authority.Only the privileged role that satisfies the access control policy can decrypt the cipher text and obtain the operation privilege,thus ensuring the privacy protection of the smart grid data in the cloud storage.Lastly,built a smart grid privacy protection system simulation platform;the platform designed a universal password security chip based on ARM + FPGA.The chip design uses a local dynamic reconfigurable technology,which sends control signal to the ARM configuration chip through the microprocessor,and controls the dynamic loading of the FPGA configuration flow file,and communicates to host computer through the serial port,then simulates the privacy protection program at all stages in the design,at the same time the final test results show that the design of this program can effectively protect the smart grid privacy data.At the same time,the cloud access control scheme based on attribute role is also simulated by a simulation platform.The results showed that the research on the protection of privacy data on smart grid and smart grid cloud storage can effectively improve the security of smart grid privacy data.