Secure and Privacy-Preserving Post-Quantum Attribute-Based Searchable Encryption for Edge-Driven Transportation Systems
Annotatsiya
To address the risks of data leakage and unauthorized access in Intelligent Transportation Systems (ITS), particularly in the post-quantum era where traditional cryptographic algorithms are vulnerable, this paper proposes a novel Post-Quantum Attribute-Based Searchable Encryption (PQ-ABSE) scheme. The scheme is designed to resist quantum attacks while providing privacy-preserving search, key aggregation, and lightweight computation. The proposed PQ-ABSE scheme ensures end-to-end privacy protection during key generation, access control, and partial decryption phases. By embedding search keywords into the access policy, it achieves partial policy hiding and ensures keyword confidentiality under quantum-resilient assumptions. Moreover, by leveraging key aggregation techniques, the scheme consolidates all file identifiers that meet both the search and access conditions into a single aggregate key, significantly reducing user-side key storage overhead while ensuring file and data security. Security analysis confirms that the scheme achieves hidden access structure security, keyword ciphertext indistinguishability, and trapdoor indistinguishability in a post-quantum setting. Theoretical analysis and simulation results further demonstrate the scheme’s practicality and efficiency in terms of both computational and communication overhead, making it a promising solution for post-quantum secure ITS data management.