Traceable and Revocable Multi-Authority Attribute-Based Encryption With Cloud and Fog Computing Feasible for IoV

With the wide application of cloud and fog computing, fog devices deployed in scenarios such as the Internet of Vehicles (IoV) are faced with the need to share massive amounts of data, which makes it crucial to implement fine-grained data access control. However, data transmission between fog devices and vehicles in the IoV is highly susceptible to eavesdropping, tampering, and other attacks by malicious vehicles. Most of the existing attribute-based encryption schemes rely on periodic key updates to enable malicious user tracking and attribute revocation, but they cannot meet the demand for real-time security response in the IoV. For this reason, we propose traceable and revocable multi-authority attribute-based encryption with cloud and fog computing (TR-MAABE-CFC). We elaborate on the system model, rigorously define the concepts, and build the security model for TR-MAABE-CFC. Subsequently, we construct a specific implementation scheme for TR-MAABE CFC. Our proposed solution provides fine-grained access control mechanisms, enables the identification of malicious entities, and supports precise attribute revocation. It can be effectively put into practice in cloud and fog computing scenarios. Experimental findings show that our scheme demonstrates superior decryption efficiency and is highly compatible with intelligent transportation system scenarios, making it a viable solution for the IoV.