OSNMA – Open Service Navigation Message Authentication
OSNMA verifies that Galileo navigation messages are authentic. It protects users against spoofed or fake satellite signals. It strengthens the security of GNSS positioning.
OSNMA verifies that Galileo navigation messages are authentic. It protects users against spoofed or fake satellite signals. It strengthens the security of GNSS positioning.

IAG collaborates closely with numerous organizations within geodesy and beyond. See the list for details.
This website is provided by the IAG Secretariat and the GGOS Coordinating Office, which are hosted by the BEV – Federal Office of Metrology and Surveying (Bundesamt für Eich- und Vermessungswesen) in Vienna, Austria.
The primary language of this website is English – however, the integrated GTranslate tool enables automatic translation into several languages:
Please note that translations into other languages may not be accurate. For reliable information, refer to the English version of the website.
