A smart grid data sharing scheme supporting policy update and traceability.

Area of Science:

• Computer Science
• Electrical Engineering
• Information Security

Background:

• Traditional attribute-based encryption schemes face challenges with centralized authorities, inefficient encryption, and inadequate access control in data sharing.
• Smart grid data sharing requires robust security, efficient access control, and privacy preservation.

Purpose of the Study:

• To propose a secure and efficient smart grid data sharing scheme using blockchain and attribute-based encryption.
• To address limitations of existing schemes by supporting policy updates and user traceability.
• To enhance data confidentiality and access control flexibility.

Main Methods:

• Utilized blockchain smart contracts for decentralized key generation, eliminating the need for a central attribute authority.
• Integrated attribute-based encryption and symmetric encryption for data confidentiality and flexible access control.
• Employed online/offline encryption and outsourced computing to reduce computational load on users and data owners.
• Implemented an access control policy update mechanism for dynamic modification of data access rules.

Main Results:

• The proposed scheme effectively protects smart grid data privacy and verifies data integrity.
• It demonstrates resistance against collusion attacks and enables tracking of malicious users leaking private keys.
• The scheme achieves efficient data sharing with a reduced computing burden compared to similar existing methods.

Conclusions:

• The blockchain-based scheme offers a secure, efficient, and flexible solution for smart grid data sharing.
• Decentralized key management and policy update mechanisms significantly improve upon traditional approaches.
• The scheme provides enhanced security features, including privacy protection, integrity verification, and traceability.