Cross domain solutions (CDS) are specialized security technologies used by military and intelligence organizations to safeguard critical data as it moves between networks of different security levels. Though traditionally unavailable to commercial sectors, critical infrastructure now faces the same need to securely transfer sensitive information. A CDS integrates software content filtering, next‑generation firewall data‑flow control, and hardware‑enforced separation found in data diodes into one hardened system. This comprehensive approach ensures secure, controlled, and trustworthy data exchange across segregated environments.

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