Leroy Automation SAS
Leroy Automation SAS
09/11/2026 | Press release | Archived content
Rail Cybersecurity
Rail Cybersecurity
- Publié le 11 September 2026
As the digitalization of rolling stock accelerates, protecting critical railway networks has become a paramount challenge for operators and manufacturers. LEROY Automation is taking a decisive step forward in this field: our DataDiode DTD is now certified IEC 62443-4-2 Security Level 3 (SL3). By combining this stringent industrial standard with the EN 50155 onboard railway standard, the DTD sets a new benchmark in the market, ensuring complete data stream integrity with zero compromise on safety.
LEROY Automation reaches a new milestone in railway cybersecurity
At LEROY Automation, cybersecurity is engineered from the ground up to address the specific constraints of the rail sector. Today, we are proud to announce a major breakthrough: ourDataDiode DTD has achieved IEC 62443-4-2 Security Level 3 (SL3) certification.
This recognition confirms the robustness of our technology and our commitment to delivering tailored solutions for critical infrastructures, where system safety, availability, and integrity can never be compromised.
A unique market benchmark for the rail industry
The DataDiode DTD brings together two essential requirements rarely found in a single product:
✅ EN 50155 compliance for onboard railway environments
✅ IEC 62443-4-2 SL3 certification for industrial cybersecurity
This combination makes the DTD a unique solution for securing data exchanges between critical train networks and external monitoring, maintenance, or diagnostic systems.
Hardware-enforced protection
Unlike software-only solutions, the DataDiode DTD guarantees strictly unidirectional communication through its hardware architecture and protocol break technology (Protocol Break & Air Gap Technology). Data can leave a critical network without any return communication being physically possible, thereby preserving full communication integrity, availability, and security.
The result: effective isolation of sensitive systems while still enabling data extraction for fleet maintenance, monitoring, and performance optimization.
A new standard for connected rail
As operators and manufacturers accelerate rolling stock digitalization, the DataDiode DTD delivers a concrete response to emerging cyber threats.
One single device. Two connected worlds. Zero compromise on security.
With this SL3 certification, LEROY Automation reinforces its position as a leading authority in railway cybersecurity and helps define the future standards for onboard architecture protection.
Leroy Automation SAS published this content on September 11, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on October 12, 2026 at 07:07 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]