NAVIGATION MESSAGE RECEPTION DEVICE

摘要

Provided is a navigation message reception device for deciding whether navigation messages from space satellites used in a satellite positioning system are legitimate. The navigation message reception device according to one aspect decides that a navigation message is legitimate when a transmission time matching a transmission time included in a navigation message which has been successfully authenticated through communication with an authentication center (120) is determined to be included in a navigation message received by a satellite receiver (230) from a GPS satellite (2) different from the one that transmitted the navigation message which was successfully authenticated through communication with the authentication center (120).