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: our DataDiode 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.