# News

Safran will provide Galileo OS-NMA


Safran’s Skydel Supports Galileo OS-NMA Simulation

Highly-anticipated function enhances capabilities of industry-leading GNSS simulation engine

ROCHESTER, N.Y., March 15, 2023 – Orolia, a Safran Electronics & Defense company, announced that its Skydel GNSS Simulation Engine will support Galileo Open Service Navigation Message Authentication (OS-NMA) simulation in the form of two-phased and separate solutions. Available in the next few months, these solutions will be available to customers who have purchased simulation access to the Galileo constellation.

The OS-NMA service will help to build a more robust and resilient GNSS service for the European Union (EU). The European Union Agency for the Space Programme (EUSPA) launched the test phase in November 2020.

OS-NMA is an emerging authentication service that allows GNSS receivers to verify the authenticity of received data in order to protect against potential spoofing attacks that can result in service disruptions, denial incidents, and more severe consequences.

Safran’s first solution is well-suited for most receiver integrators that want to test the OS-NMA capability of a GNSS receiver with the official test vectors from EUSPA. Available at no charge in 2023, this solution will support the available official test vectors sample data, which supports the verification of OS-NMA functionality implementation.

The second option will provide full flexibility in the configuration of the scenario (time, navigation message, etc.) as well as the OS-NMA authentication parameters (keys, encryption algorithms, message sequences, etc.). It will be useful for advanced users (e.g.: receiver manufacturers) that test receivers in a wide range of edge and corner cases.

Available later in 2023, this phase will include the following elements in Skydel:

  • A new Skydel engine supporting OS-NMA SIS ICD 1.0.
  • Authentication of the Galileo E1 OS Navigation Message.
  • Support for the Timed Efficient Stream Loss-tolerant Authentication (TESLA) protocol.
  • Useful crypto material for running user-programmable simulation test scenarios.

This feature will be ready for future software updates in accordance with the next phases
recommended by EUPSA.

Learn more about testing a receiver’s Galileo OS-NMA capability using Skydel in this Application Note.

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