Stop threats before they start

Everfox Data Diode

To protect high-trust environments, Optical Data Diodes and Protocol Filtering Diodes provide assured one-way flow and approved content movement that help missions defend critical systems and enable safe information transfer. Everfox Data Diodes deliver controlled, unidirectional, one-way transfer for high-trust networks, enabling secure movement of data out of protected domains without allowing anything to return.

The Future of Cybersecurity Is Becoming Operational

Everfox Data Diodes for Government and Defense

Optical and Protocol Filtering Diodes support separated networks, validated content flow and regulatory compliance for industrial control systems, tactical operations and classified environments. They protect a wide range of mission critical systems including databases, historians, SCADA, PLCs and DCS environments, providing hardware enforced one way movement for trusted data flows.

Secure Data Pipelines for AI

Assurance Matched to the Mission

Not all boundaries carry the same risk, and the control should reflect the boundary. A sensor feed leaving a control network needs a physical assurance that nothing comes back. A tactical unit pushing messages to a lower enclave needs that plus confirmation that only approved content crosses. Partners at different classification levels need inspection, transformation, and a release decision tied to policy.

Everfox covers that range in one portfolio: hardware-enforced one-way transfer, Hardsec-validated content flow, and policy-aligned Cross Domain exchange. Unidirectional transfer is the foundation for the highest assurance boundaries, where any inbound network route must be physically prevented rather than logically blocked.

Find the Right Level of Protection for Your Data

Network Firewall

Network Firewall diagram
Data Flow
Bidirectional
Enforces
Ports, protocols and sessions
Content
Limited inspection
Assurance
Software-enforced
Best For
Network Segmentation and access control

Data Diode

Data Diode diagram
Data Flow
One-way only
Enforces
Physical direction
Content
Minimal
Assurance
Hardware-enforced
Best For
One-way transfer

Protocol Filtering Diode

Protocol Filtering Diode Diagram
Data Flow
One-way only
Enforces
Direction and allow lists
Content
File and protocol validation
Assurance
Hardware plus filters
Best For
One-way transfer of approved content

Cross Domain Solutions (CDS)

Cross Domain Solutions diagram
Data Flow
One-way or Bidirectional
Enforces
Mission and release policy
Content
Deep inspection and transformation
Assurance
Designed for high-assurance
Best For
Controlled sharing across security domains

Designed to Meet
Your Requirements

Everfox Data Diodes are designed to meet mission assurance requirements and align with recognized one way data transfer standards.

  • NSA Tested

    NSA-tested and NCDSMO-approved hardware-based data diodes enforce strict source-to-destination separation, enabling compliance with regulations that mandate one‑way data flow and physical network isolation.

  • NCDSMO Approved

    Everfox Data Diodes support global regulatory standards and Raise The Bar (RTB) guidelines while enabling rapid, automated data transfer and are designed to work with networks of all sizes. By providing a protocol break, our Data Diodes are a Protocol Filtering Device (PFD) as defined by NCDSMO’s Raise The Bar.

  • UK NCSC Design Patterns

    Everfox Data Diode is designed for use in highly secure environments, by implementing key stages to UK National Cyber Security Centre’s (NCSC) design patterns for Safely Importing Data and Safely Exporting Data.

Resources

Frequently Asked Questions

A data diode is a hardware device that only allows data to move in one direction. Everfox uses this approach to help government and defense organizations move mission data out of high trust networks without creating a return path. Optical Data Diodes use fiber optic hardware to support one way movement that does not rely on trusted software.​ This air gap between networks uses the laws of physics to ensure that networks are safe from attacks, malware, and other threats.

A firewall manages traffic through software rules. A Data Diode manages traffic through hardware design. Firewalls can be bypassed or misconfigured. Everfox Diodes enforce direction through physical separation or Hardsec logic, which helps remove common software based risks. Many mission environments use both technologies together.​

Mission teams often evaluate throughput, assurance level and support for compliance frameworks. Everfox Data Diodes support high speed one way transfer up to nine gigabits per second. Everfox Protocol Filtering Diodes work by using hardware logic to verify each data stream and enforce a protocol break. This approach ensures that no data bypasses verification. Many government and defense programs also look for alignment with separation patterns and support for ICS, OT and tactical systems.​

To transfer data securely between mission networks, teams often rely on hardware enforced separation. Everfox Protocol Filtering Diodes apply Hardsec logic to verify each data stream and enforce protocol break so only approved content moves forward. For missions that require inspection or transformation, Everfox Cross Domain Solutions add policy aligned control.​

Everfox Diodes help protect high trust environments by supporting separation, validated content pathways and compliant movement of mission data. Optical Diodes focus on physical protection. Protocol Filtering Diodes focus on Hardsec verified data. Together with CDS, they give missions options for separation, validation and controlled release. ​

Yes. Everfox optical and protocol filtering technologies support one way movement which helps organizations maintain segmentation and manage cyber risk. Hardsec verification helps ensure validated content crosses network boundaries in regulated government and defense environments.​

Yes. A data diode remains one way by design, but two diodes can be deployed in opposite directions to create bidirectional transfer. Each diode enforces one way movement on its own path, preserving physical separation while allowing information to flow both ways.

They are suitable for databases, historians, SCADA systems, PLCs, DCS environments and other industrial control or tactical systems that require hardware enforced one way boundaries.

They are configured through an intuitive interface, support non routable one way paths and provide health, link and throughput visibility. Logs and telemetry can be exported to SIEM or SOAR platforms for operational monitoring.

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