Group-based Handover Authentication for Space-Air-Ground Integrated Vehicular Networks

Space-air-ground integrated vehicular networks (SAGIVN) integrate satellite networks, aerial networks (UAVs) and vehicular networks into a complete network system, which has been attracting a lot of attention and exploration. SAGIVN can make vehicular platoon to keep connected and accessing the network of some areas with lack of infrastructure. However, satellites, UAVs and vehicular platoon accessing the SAGIVN will bring a huge security and efficiency challenges. In this paper, we propose an efficient and secure handover authentication scheme, along with the batch verification mechanism, for vehicular platoon in SAGIVN. The proposed scheme can enhance handover efficiency when vehicular platoon switches from the current UAV to the new UAV. Finally, the security analysis shows that our scheme can satisfy a variety of security requirements. The performance evaluation shows that our scheme has a better effect on both signaling overhead and handover latency than existing schemes.