Grid data sharing scheme based on blockchain and hybrid encryption

Smart grid collects data in real-time to accomplish load balancing and power resource allocation. However, the power grid data faces the security risk of being leaked or tampered with when it is transmitted through open channels. Based on blockchain and hybrid encryption, a secure grid data sharing scheme with hidden policy is proposed. The grid data is encrypted using a hybrid encryption technology of symmetric encryption and attribute-based encryption, which ensures the confidentiality and privacy of the grid data. The multi-attribute authorization mechanism is used to prevent collusion attacks, and the policy is hidden to ensure that private information is leaked. Additionally, the verification token is stored on the blockchain to complete message integrity verification. The analysis results show that this scheme has higher computational efficiency and can achieve secure sharing of grid data.