LBS Meets Blockchain: An Efficient Method With Security Preserving Trust in SAGIN

In Internet of Vehicles (IoV), the vehicle ad hoc network (VANET) provides the location-based service (LBS) when vehicles communicate with the dynamic environment. As an integration of satellite systems and terrestrial communications, the space–air–ground integrated network (SAGIN) provides a reliable and efficient way for LBS. But the privacy protection in SAGIN cannot meet LBS security re...