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MLS Security Lattice
The following diagram shows the MLS Security Lattice for a representative set of MLS labels. The security lattice is a graphical representation of the dominance relationship between all labels in the system. For this example, the system has four sensitivity/clearance labels (TS>S>C>U) and two compartments (A and B). If a path exists from one node to a second node then the label associated with the first node strictly dominates the label associated with the second node. Information is permitted to flow from the first node to the second node.
Labels towards the top of the diagram have a higher sensitivity/clearance. Labels towards the right side of the diagram have more categories (need to know). The special label 'TS:AB' is referred to as System High because it dominates all other labels in the system and information may flow to it from any label in the system. The label 'U' is referred to as System Low because it is dominated by all labels in the system and information may flow from it to any other label on the system.
Trusted RUBIX uses the same MLS Security policy configuration, and thus security lattice, as the underlying operating system.
MLS Security Lattice Diagram