Sphyrna Security NGXS Passive Data Diode vs Sphyrna HFD Data Diode: 2026 Comparison

Sphyrna Security NGXS Passive Data Diode

Enterprise and mid-market OT teams managing critical infrastructure with zero-trust segmentation requirements should pick the NGXS Passive Data Diode for its truly unidirectional optical isolation, which eliminates backhaul attack paths that active devices leave open. The 10Gbps throughput over passive fiber optic transmission means you're not introducing a networked chokepoint that needs patching, and that aligns directly with NIST PR.IR resilience architecture by removing a potential single point of failure. This isn't for buyers seeking software-defined segmentation or cloud-native OT connectivity; you're committing to hardware-based, physics-enforced isolation in fixed network topologies.

Sphyrna HFD Data Diode

Enterprise and mid-market OT security teams protecting critical infrastructure from east-west lateral movement will get the most from Sphyrna HFD Data Diode because it enforces unidirectional data flow at wire speed with hardware-level assurance that no firmware or software compromise can bypass. The FPGA architecture with separate ingress and egress quads plus encrypted, signed rulesets mean you can filter at layers 2-4 and decrypt traffic for inspection without creating a single point of trust failure on the network path itself. Skip this if your environment is predominantly IT-focused or you need bidirectional segmentation; data diodes are inherently one-way tools and there's no workaround for that constraint.