D3-OLV

Harden
Operational Logic Validation

Definition

Validation of variable state in the context of the control logic of the operational application.

How it works

Validates the type, value, and/or range of a variable taking into account the local operational logic and operational state.

For example, if a controller has a restricted range when in a specified state, this may crosscheck the value against the state in addition to a more general range validation.

Artifact Relationships

This defensive technique relates to specific digital artifacts.

validates
Operational Logic Validation
OT Control Function

References

Reference - Secure PLC Coding Practices: Top 20 List