Unidirectional Gateway
Also known as:Data Diode
Unidirectional Gateway: Security component that technically permits data traffic in only one direction. ImplementationImplementationThe practical realization of a security design, requirement, or control in a system or process. should consider architecture, permissions, hardening, monitoringMonitoringThe continuous observation of systems, identities, networks, and controls for relevant changes., dependencies, and operational recoveryRecoveryThe controlled restoration of systems, data, and business services after a disruption. in an integrated manner.
How it works and where it fits
Unidirectional Gateway is a preventive, detective, or corrective security control. Its effect depends on where it sits in the architecture, which data and decisions it processes, and how it might be bypassed. A control reduces a defined risk but rarely removes it completely, so it should be combined with additional layers of protection.
Practical security relevance
Before deployment, the objective, ownership, coverage, and expected behavior should be defined. Secure defaults, controlled exceptions, logging, and periodic effectiveness tests matter more than installation alone. Operational metrics should expose both blocked or detected activity and gaps, false alerts, and effects on legitimate business processes.
Related concepts
- Air GapAir GapA security principle in which a system is physically or logically separated from other networks.: A security principle in which a system is physically or logically separated from other networks.
- Operational Technology SecurityOperational Technology SecurityProtects industrial control, production, and process control systems.: Protects industrial control, production, and process control systems.
- Network SegmentationNetwork SegmentationSeparates network segments to control access and limit lateral movement.: Separates network segments to control access and limit lateral movement.
- GatewayGatewaySystem that mediates communication between different networks or protocols.: System that mediates communication between different networks or protocols.