Architecture for Legacy OT
Eliminates Human-Error

Secure 30-year-old industrial assets without replacement. Enforce NERC CIP and IEC 62443 compliance with a non-intrusive hardware proxy.

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The Reality

The Legacy Gap

Critical infrastructure relies on unpatchable protocols. Replacing them is prohibitively expensive and operationally risky.

Unpatchable Vulnerabilities

Legacy PLCs and RTUs often run on protocols like Modbus and DNP3 that lack native authentication. They cannot be patched without risking operational stability.

Prohibitive Replacement Costs

Industry estimates suggest over $155B in legacy infrastructure requires modernization. Full replacement cycles take decades and introduce massive downtime risks.

Human Error

The most difficult challenge which introduces catastrophic OT risk is human error. Without command validation, a single mistake can cascade across the entire electrical grid.

The Solution: Hardware-Based PEP

A non-intrusive retrofit that inserts a PLC function call Policy Enforcement Point (PEP) directly into the control loop. It validates commands and optionally encrypts traffic without modifying the legacy hardware.

  • Bump-in-the-Wire: Transparent insertion requiring no IP changes or network redesign.
  • Protocol Validation: Application-layer inspection whitelists safe commands and blocks anomalies.
  • Fail-Safe Architecture: Hardware bypass ensures 99.999% availability even during device failure.
  • Deny-by-Default: Blocks all unauthorized traffic by default, enforcing strict least-privilege access.
SCADA / HMI
PEP Layer
Validation
Encryption
Legacy PLC / RTU

Compliance & Standards

Designed to bridge the gap between theoretical Zero Trust and physical OT reality.

IEC 62443 Alignment

Our solution acts as a compliant Conduit within the Zone-and-Conduit model, enabling facilities to achieve Security Level 3 (SL-3) without replacing legacy endpoints.

  • IEC 62443-3-3: Enforces restricted data flow and system integrity between zones.
  • IEC 62443-4-2: Provides component-level hardening for unpatchable devices.

Regulatory Mandates

Directly supports compliance with NERC CIP and NIST SP 800-207 (Zero Trust Architecture) by enforcing continuous verification and micro-segmentation.

  • Auditable command logs for forensic analysis.
  • Encryption of legacy serial/Ethernet traffic.
  • Alignment with CISA directives for critical infrastructure.

Research-Backed Partnership

Born from a university master's project, we offer a lean, agile approach to OT security. We are seeking design partners for pilot deployments and joint whitepapers.

Pilot Programs

Controlled deployment in non-critical segments to validate efficacy and operational impact.

Joint Research

Co-authoring whitepapers on command and function hardening in legacy environments.

Target Sectors

Municipal Utilities, Defense Industrial Base, Energy Generation, and Water/Wastewater.

Request a Technical Briefing

Interested in a pilot or partnership? Contact us for a confidential discussion about your OT security posture.