CyberTRIZPEDIA

Logic Solver Availability vs Cybersecurity Controls

Implement secure-by-design logic solver architecture with network segmentation so cybersecurity controls never compromise continuous safety function availability.

CyberTRIZ analysis · Seveso contradiction FS026 · one of 8,235 worked contradictions published by CyberTRIZ.AI

Regulations

Business Context

Safety Logic Solvers must remain continuously available to execute

Safety Instrumented Functions whenever hazardous conditions occur. At

the same time, cybersecurity controls such as authentication, patching,

and access restrictions are necessary to protect these critical systems

from unauthorized access.

The Contradiction

Stronger cybersecurity improves system protection.

Additional security controls may reduce operational availability and

maintenance efficiency.

Why It Exists

Functional safety requires continuous availability, while cybersecurity

introduces additional operational controls that may complicate

maintenance, diagnostics, and engineering support.

Direction

Design Safety Instrumented Systems using secure-by-design principles,

network segmentation, controlled remote access, and maintenance

procedures that preserve both cybersecurity and functional safety.

TRIZ principles applied

P01 SegmentationP40 Composite MaterialsP05 MergingP06 UniversalityP10 Prior ActionP11 Beforehand Cushioning