Cross Domain without compromise
In high-security environments, controlling and securing data flow between networks with different classification levels is critical. 4Secure’s Cross Domain Solutions provide trusted, efficient, and policy-enforced data transfer – ensuring the right information reaches the right place, without compromising security or compliance.


Understanding Cross Domain Solutions
Cross Domain Solutions (CDS) enable secure data transfer between isolated environments operating at different security classifications. By combining hardware and software they ensure controlled, policy-enforced information exchange without compromising security.
This allows organisations to maximise data intelligence and improve operational efficiency whilst maintaining strict security controls. CDS can be unidirectional or bidirectional, depending on the level of access and data flow required.
Benefits Of Cross Domain Solutions
Cross Domain solutions are an essential tool for organisations that require secure data access and transfer in a multi domain environment – allowing devices of different security levels to communicate across boundaries without violating security policies.

Lower total cost of ownership
Streamline your operations and cut costs by replacing time-consuming manual data import processes with Cross Domain Solutions (CDS).

Increasing data security standards
Our solutions are designed around highly assured hardware and software to ensure compliance with the most stringent information assurance standards.

Enchanced Collaboration
Cross Domain Solutions faciliate secure and seamless information exchange across various organisational domains, thus enabling teams to access critical data at any moment.
Software enhanced Cross Domain
At the heart of 4Secure’s Cross Domain Solutions is TrustedFilter®, a cybersecurity software suite that unlocks strategic and commercial advantage. TrustedFilter® has three core modules:

SECUREimpex
TrustedFilter®’s SECUREimpex component offers a comprehensive suite of tools designed for the secure import of data across varying security classifications. It facilitates the seamless transfer of critical images, documents, videos, software updates, and OT data between domains, ensuring adherence to stringent Information Assurance standards

SECUREcommand
TrustedFilter®’s SECUREcommand component enables inherently two-way, bi-directional TCP applications to operate via two physically separate unidirectional appliances. This setup ensures that only legitimate data, which has passed through the TrustedFilter® verification engine, is able to cross the network boundary. It supports protocols such as HTTP/HTTPS, VNC, RDP, and other TCP-based protocols.

SECUREstream
TrustedFilter®’s SECUREstream facilitates the replication of screen images from within the network, across a unidirectional appliance in near real-time, providing those images to end-users on a target network. This is particularly valuable for secure monitoring and sharing of device screens from a low-security domain to a high-security domain, featuring content validation and malware detection.
Supported Applications
Native applications supported by 4Secure Cross Domain Solutions and TrustedFilter® software.

Modbus Transfer

Log Forwarding

Performance Management

OPC Transfer

OSIsoft PI System Transfer

Screen Replication

Remote File Transfer

DNP3 Transfer

HTTP Transfer

Advanced Messaging Queueing Protocol

MQ Telemetry Transport
FAQs
What are the advantages of Cross Domain Solutions?
Cross Domain Solutions facilitate data sharing between two environments that would otherwise be disconnected. This offers seamless, on-demand data access for users in both environments, eliminating the need for manual import and export processes to move data between varying security classifications. Such processes are time-consuming and inefficient. Ultimately, a Cross Domain Solution enhances user productivity and boosts organisational efficiency.
What are Cross Domain Solutions?
Cross Domain solutions (CDS) combine hardware and software to securely transfer data between environments operating at different security classifications that would otherwise be disconnected. Cross Domain Solutions can be unidirectional or bidirectional.
Cross Domain Solutions serve as powerful business enablers, enhancing organisational efficiency by empowering users to have seamless on-demand access to their data erasing the need for time-consuming manual import processes for users to get the data they need.
4Secure’s TrustedFilter® Cross Domain solutions typically include a suite of 4Secure TrustedFilter® software, which provides feature-rich capabilities while strictly adhering to information assurance principles. The TrustedFilter® software is often integrated with a data diode or other hardware-enforced unidirectional appliance.
What is the role of software in a Cross Domain Solution?
The crucial component of a Cross Domain Solution is its software, responsible for enabling data to flow and ensuring information assurance.
4Secure’s Cross Domain Solutions utilise 4Secure’s proprietary TrustedFilter® software to perform one of the following four key roles:
Protocol Handling: Proxies are necessary to terminate applications and protocols that usually rely on two-way communication, converting them into one-way data streams suitable for unidirectional data diodes or appliances.
Data Verification: This involves in-depth content inspection and validation to permit only the expected data for transmission.
Data Transformation: Transforming complex data types into a structured markup language is often a prerequisite to enable effective verification.
Data Decryption and Re-encryption: Decrypting encrypted traffic is often necessary for interpretation by a verification engine. If the data is successfully verified, it is re-encrypted before being sent to its destination.
Is a data diode enough?
A data diode primarily enforces unidirectional flow control through hardware.
A Cross Domain Solution combines both hardware and software to provide feature-rich capabilities. These include handling two-way protocols in a one-way environment, performing transformation on data types into structured markup languages, as well as content inspection and data validation.
Cross Domain Solutions can also be implemented for bidirectional use-cases, whereas a data-diode will only function unidirectionally.