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.