Achieving Multi-Authority Access Control with Efficient Attribute Revocation in smart grid

In smart grid, control center collects and aggregates users´ electricity data via the smart meters. The aggregated data is also of great use for markets. To efficiently and securely distribute these data to markets, the existing schemes use Attribute-based Encryption (ABE) technique to achieve privacy preservation of sensitive data and fine-grained access control. However, the efficient attribute revocation problem has not been studied well. In this paper, leveraging the Third Party Auditor and Ciphertext-Policy ABE techniques, we propose a Multi-Authority Access Control with Efficient Attribute Revocation (MAAC-AR) scheme in smart grid. Security analysis demonstrates that MAAC-AR can achieve fine-grained access control, collusion resistance, privacy preservation and secure attribute revocation. Performance evaluation shows that MAAC-AR is more efficient compared with the existing schemes in terms of functionality as well as computation, communication and storage overhead.