TAHA: Trajectory-based Access and Handover Authentication Scheme for High-Speed Terminal in Space-Terrestrial Integrated Network

In this work we propose a predicable trajectory based access and handover authentication mechanism for high speed mobile terminals in space-terrestrial environment. In this design, during the terminal access authentication process, a satellite access point forwards the initial access request of a moving terminal to a ground control center where the ground control center assists the satellite and the terminal achieve the mutual authentication. Meanwhile, the ground center uses the Chinese Remainder Theorem to generate the trajectory information about the moving terminal, which helps the terminal perform the further handover authentication without any third party's assistance. The security analysis is carried out using formal verification methods and the results show that the proposed scheme could meet the security requirements. The evaluations valid the proposed scheme can reduce the overheads of signaling, communication, computation during frequent handover. This work can help solving the security and performance bottleneck caused by frequent handover of the high-speed terminal in the space-terrestrial integrated network.