On 12 May 2025, Stoneridge announced the launch of its new SE5000 Smart 2 tachograph, designed for the European commercial vehicle market and incorporating Open Service Navigation Message Authentication (Osnma) technology. Available for order since 7 May 2025, the device aims to offer greater fleet management security and high-precision localisation, in compliance with the latest European Union regulatory requirements.
The tachograph operates via the Gnss satellite positioning system, with a particular focus on the European Galileo constellation. For accurate functioning, it requires a stable signal from at least three satellites. The true innovation lies in the use of Osnma, which introduces a level of authentication for Gnss signals that helps combat spoofing—namely, the falsification of location data—thereby directly enhancing road safety and the integrity of the recorded information.
The SE5000 Smart 2 fully complies with the European Union’s Mobility Package I, introduced in July 2020 to improve road safety, reduce driver fatigue and foster fair competition in international transport. Beyond its security features, the new device also delivers improved operational performance.
Its updated software ensures greater reliability and a simplified user interface, enhancing the experience not only for drivers but also for workshop technicians and fleet managers. The SE5000 Smart 2 is also available as a software upgrade for already-installed devices.
Osnma technology works by embedding cryptographic signatures into satellite navigation messages. When a Gnss receiver detects signals from at least three Galileo satellites, Osnma checks their authenticity through a cryptographic algorithm, comparing the received signatures with those generated by a control infrastructure managed by the Galileo Service Centre. Only signals that pass this authenticity check are considered valid.
In practice, this means the tachograph can more reliably record vehicle location, driving times and rest periods, reducing the risk of tampering. Osnma does not change how the vehicle receives positional data, but rather acts as a security filter to certify the integrity of the signal. This authentication is crucial in a regulatory context where data accuracy and resistance to manipulation are essential for enforcing rules on driving and rest times and ensuring fair competition in international haulage.
