Power big data covers all links such as power generation

transmission

transformation

distribution and consumption

featured with the characteristics of wide data sources

complex data structure

high real-time requirements and containing a large amount of sensitive information. During the sharing process

once the data is leaked

it will not only infringe upon the privacy of users

but also threaten the safe and stable operation of the power system. It has significantly increased the difficulty of sharing power big data. Traditional methods usually complete encryption directly before data sharing

but they cannot ensure the security of the encryption environment for power big data

resulting in the problem of theft still occurring during the sharing process. Therefore

a secure sharing technology for power big data based on consortium chain and attribute encryption is proposed. A power big data sharing platform is established based on alliance chain

on the consortium chain

attribute encryption methods are used to set encryption access strategies for power big data. The consortium chain can provide a trusted environment where all parties can record the sharing process and usage of data through blockchain

ensuring that only users who meet specific attribute conditions can access the corresponding power data; based on Lagrange interpolation and Shamir secret sharing scheme

power data is segmented and distributed to ensure the security and privacy of power data during the sharing process

while improving the efficiency and flexibility of power data access. The experimental results indicate that the proposed data security sharing method is more suitable for practical applications and has higher security.