Cybersecurity for Critical Infrastructure
Securing critical infrastructure and cyber-physical systems is vital to national security, economic stability, and public trust. From energy grids and transportation to healthcare and manufacturing, these systems are increasingly connected — and increasingly targeted. Cyberattacks on physical infrastructure can have real-world, irreversible consequences. That’s why robust, tailored cybersecurity is essential to protect operations, ensure resilience, and safeguard lives. Yellow Cube helps partners secure these complex environments with trusted, industry-proven solutions.
Key cyber priorities
Top solutions
Protecting What Can’t Be Replaced
Critical infrastructure demands a distinct cybersecurity approach — one that accounts for its physical impact, limited redundancy, and operational constraints. Unlike traditional IT environments, these systems often can’t be patched due to uptime requirements, lack comprehensive backup solutions, and were never designed to defend against modern cyber threats.
Operational technology (OT) environments frequently rely on outdated protocols with no encryption, authentication, or data validation. Designed for isolated operation, these systems remain highly vulnerable to even basic attacks like man-in-the-middle interceptions.
But isolation is no longer reality. As industrial networks become interconnected with broader IT systems — through remote access, cloud services, and supply chains — they face a rapidly expanding threat landscape. The consequence of a breach isn’t just data loss — it’s real-world disruption, material damage, and public safety risk.
At Yellow Cube, we don’t just try to “secure” legacy OT systems — we build secure enclaves where they can operate safely. Wherever possible, we advocate for air-gapped separation as the gold standard. Where full isolation isn’t feasible, we provide secure, managed gateways that preserve airgap integrity while enabling controlled data flow. Advanced XDR solutions with passive sensors help monitor OT traffic without disruption, offering real-time visibility into assets and network activity.
Because attackers typically breach IT systems before pivoting into OT environments, strong IT and supply chain security is essential. That’s why we reinforce office IT networks with 24×7 managed detection and response, proactive attack surface management, and strict access controls — stopping threats before they can reach industrial layers.
And for environments where absolute security is non-negotiable — like nuclear facilities — we deliver formally validated, hardware-enforced optical data diodes to ensure 100% unhackable, one-way data flow.
In the world of critical infrastructure, trust is built through unbreakable defenses.
FAQ
Our customer's OT systems can't be patched and don't speak modern protocols. How do we propose securing them without breaking anything?
Don't try to harden the OT gear in place — propose a secure enclave around it. Where airgap is feasible, that's the gold standard; where it isn't, OPSWAT MetaDefender gateways and Stormshield industrial firewalls enforce strict, monitored flow without touching the OT device, which is what makes the proposal acceptable to plant engineering in the first place.
Optical or electronic separation in a unidirectional gateway — which do we propose for which customer?
Unidirectional data gateways come in two flavours: electronic separation (typically PCI Express cards syncing memory across the boundary) and optical (light only, no electrical path back). Optical is theoretically 100% hacker-proof — return communication is physically impossible. Electronic separation carries a hypothetical return-path risk, but only if an attacker has already compromised both sides — and at that point the OT side is taken anyway, so the gateway has nothing left to defend. Propose electronic separation as the cost-effective default for almost every OT customer; reserve optical for nuclear plants and similar customers where theoretical perfection is the bar, not practical defense.
Attackers usually breach IT before they touch OT. How do we frame an IT-side proposal to an OT-focused buyer?
By being honest that the OT segment is what makes headlines, but the office IT network is where the breach actually starts. Pair the OT segmentation conversation with 24x7 managed detection on the IT side and external attack surface monitoring — that's where the budget and the real risk reduction are, and OT engineers respect partners who say it plainly.
Third-party and contractor access into the OT environment is a recurring objection from plant managers. What do we propose?
Brokered access through managed, monitored gateways — not "we gave the vendor a VPN account". Sessions are logged, constrained to specific assets and time windows, and revocable in one place, which is also the answer plant managers want to hear when their compliance auditor asks the same question.
Let’s Build Smarter Cyber Defenses Together
Partnerships are the foundation of everything we do — built on trust, expertise, and shared success. Whether you’re looking to grow your business, strengthen your cybersecurity offerings, or bring innovative solutions to new markets, Yellow Cube is ready to be your committed, long-term ally.