Session A1: Navigation Security and Authentication

QZSS Signal Authentication Service: Field Test Results
Satoshi Hosoda, Yuichi Saida, Cabinet Office; Ren Terada, Naohiro Tanioka, Hitoshi Haruta, NEC Corporation
Location: Holiday 1 (Second Floor)
Date/Time: Wednesday, Sep. 10, 11:03 a.m.

On April 1st, 2024, the Cabinet Office, government of Japan launched a signal authentication service, which can confirm whether signals received by GNSS receivers are official signals transmitted from the positioning satellites or not.
As of this moment, this service is the only officially operational signal authentication service in the GNSS worldwide market.
In addition to providing the service, we have been conducting various field tests as one of the users.
We assessed not only the authentication rate at monitoring stations arranged around the world but also the authentication rate in various fields such as rural areas and urban canyons by equipping vehicles with receivers.
Field tests with vehicles revealed the rare occurrence of false detection. There is no doubt that this false detection trouble the users, therefore, we developed the countermeasure against this issue, and already confirmed the effect of this countermeasure.
Furthermore, we conducted an analysis of threats to the signal authentication service and acknowledged more advanced spoofing attack methods. We also developed the countermeasure against this issue.
As mentioned above, we have been not only broadcasting the signal authentication service but also conducting the evaluation from the user's perspective and have developed additional functions that should be equipped in GNSS receivers.
These would make it possible to detect spoofing attacks in real-time only using the signal processing capabilities of the receiver, without the need to combine additional sensors (odometer, inertial sensors, etc.).
We are also considering providing the sample software that evaluate the signal authentication service to the users within the service coverage so that we would like to know the user's feedback.