Secure Routing Based on Geographic Location for Resisting Blackhole Attack In Three-dimensional VANETs

Based on dynamic 3D Vehicle Ad Hoc Networks (VANET) environment, this paper puts forward Trust-based Greedy Forwarding Routing (TGF), including establishing trust model to resist black hole attack and selecting the secure routing path. Compared with the two-dimensional VANETs, the problem of transmission loss is considered in the three-dimensional environment. And in the process of establishing the secure route, the influence of geographic location and the number of interactions between nodes is considered. Compared with the Greedy Perimeter Stateless Routing (GPSR), the packet loss rate reduces approximately 24%, and the throughput increases approximately 18%. The NS3 simulation verifies that TGF is more suitable for three-dimensional scenarios with black hole attack than GPSR.