| Summary: | The developments of AI, information security and network technology have improved the security, efficiency of the smart grid system. However real-time data and consume data sharing make privacy leakage, malicious entities and users be uncontrollable factors in the grid. Accountability can solve them partly and give an enhanced security guarantee to smart grid. The existing accountability system only focuses on the device level, and does not consider actual security. In this paper, an accountable multi-authority access control framework based attribute-based encryption (ABE) on for smart grid was proposed to solve the above problems. The proposed scheme not only solves the single-point failure problem in the smart grid, but also supports securely fine-grained access control to sharing data in real time. Furthermore, this scheme uses a protocol to limit the control of private keys by malicious entities, and can trace the responsibilities of malicious entities to ensure data security and privacy. Finally, theoretical analyses and performance evaluations show the proposal is more efficient and secure than the available.
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