Research On Data Privacy Protection Of Smart Grid Data Based On Blockchain

The issue of privacy of power data in smart grids has attracted more and more people’s attention.How to protect the transaction privacy of both parties in electricity transactions has become a current hot spot.The traditional data processing and storage methods of the single power grid are easy to expose the power grid data,which seriously threatens the privacy of users.According to the characteristics of blockchain technology such as decentralization,tamper resistance,traceability,and distributed storage,the privacy protection scheme of smart grid data based on blockchain technology is studied.Mainly completed the following research work.(1)Research on privacy protection scheme for smart grid data aggregation.The centralized data processing method of the smart grid is easy to be exposed to a single point of attack,which will cause leakage of user information and consumer information.Using the decentralized characteristics of the blockchain,the Paillier encryption algorithm and the Shamir secret sharing algorithm are combined in the process of grid data aggregation to realize the safe and efficient aggregation operation of power data by power companies.This solution can solve the problems of traditional data aggregation solutions that must rely on trusted centers,as well as high energy consumption and waste of computing resources.(2)Research on privacy protection of smart grid data access control.Based on the existing access control of electricity data,the problems of the traditional scheme are proposed,and the grid data access control scheme based on blockchain is designed.Upload the registration process and access process of the grid users to the blockchain.When you need to obtain grid data,you can verify the block to open the corresponding permissions to the data you want to access,to achieve access control of the grid data.This solution can meet the privacy protection requirements of users’ electricity data,and can resist multiple attacks.In terms of efficiency,the scheme is better.(3)Research on power data storage and disaster recovery backup solutions.Aiming at the current problem of insufficient storage capacity based on blockchain-based power data storage,the dual-chain design is adopted,the hash value of the data calculation is stored on the main chain,and the verification operation is performed.Composition,no detailed power data is stored on the blockchain,the real power data is stored under the blockchain.In the disaster recovery backup scheme,the Shamir secret sharing algorithm and the threshold secret sharing scheme are used to efficiently store power data,which can tolerate that some nodes can still recover the original data when a failure occurs.Moreover,the proposed solution can realize the safe storage of power data without occupying too much storage space.