Power grid data privacy protection and sharing system and method based on block chain technology

The invention relates to the technical field of power network security, in particular to a power grid data privacy protection and sharing system and method based on a block chain technology. The system comprises a power grid cloud server, a user layer, an intelligent terminal and a power alliance chain. A distributed identity authentication mode is adopted, and transactions are sequenced, packaged, executed and subjected to uplink storage through a power alliance chain, so that the security and credibility of data are ensured; the identity of the intelligent electric meter is verified and checked through the pseudonym of the user in the data returned by the public key infrastructure; through the functions of data aggregation, dynamic pricing, electric quantity charging, anomaly analysis and the like performed on the edge by the intelligent terminal, the resource overhead of traditional central data calculation is reduced, and the data processing efficiency is improved. According to the invention, the power in