Flexible and Secure Cross-Domain Signcrypted Data Authorization in Multi-Platoon Vehicular Networks

Autonomous Vehicle Platooning (AVP) presents a promising approach to reducing energy expenses, improving traffic safety, and enhancing capacity. In multi-platoon vehicular networks, platoons can collaborate to ensure better data transfer reliability. However, the existing secure information-sharing methods between platoons face efficiency and security challenges. These challenges arise from (1) a lack of an efficient method to simultaneously ensure confidentiality, authenticity, and non-repudiation of the transmitted information; (2) difficulty in cross-domain dynamically sharing ciphertexts to multiple recipients is challenging. To overcome these challenges, we propose a Flexible Cross-domain Data Access Control (FC-DAC) system in this paper. Our FC-DAC system ensures confidentiality, authenticity, and non-repudiation of transmitted information while enabling high-efficiency ciphertext sharing between various platoons. Additionally, the FC-DAC solution allows vehicles with valid authorizations to access signcrypted information quickly and efficiently, even if they belong to different platoons. Our theoretical and experimental analysis demonstrates that the FC-DAC scheme is resistant to various common attacks and is applicable to multi-platoon vehicular networks.