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Extra resources for Graphical Models for Security: Second International Workshop, GraMSec 2015, Verona, Italy, July 13, 2015, Revised Selected Papers
For example, SysML-Sec Attack Graphs: Compact Representations for Complex Attacks 45 Fig. 13. An attack has been disabled in the Zitmo attack graph (Diagram on the left). Because of the disabled attack, the root attack cannot be performed anymore (right part of the figure). if we disable the attack “SilentlyInterceptSMS” (left part of Fig. 13), then, the root attack is not reachable anymore (right part of Fig. 13). 6 Combining Operators and Attacks This section discusses ways to handle complex attack relations relying on the relations between attacks described in Sect.
2 Compatibility Between Temporal Constraints The joint use of AFTER and BEFORE can lead to situations where attacks are not reachable, because of the timing values of these operators. For example, 46 L. Apvrille and Y. Roudier Fig. 14. The “final” attack cannot be performed because the two temporal constraints are not compatible in Fig. 14, the root attack is not reachable because an attack is required to be performed before 10 units of time. But the AFTER operator forbids that situation. Modifying the temporal value in AFTER and BEFORE can make the root attack reachable, for example, by using the same temporal value.
2 Identified Challenges (1) Visual Scalability. Big graphs get cluttered really quick and loose the possible insight gain for the user. Techniques to reduce the size of the graph data shown to the user at a time have to be added to the visualization. Mechanisms like a level of detail approach, where parts of the graph were collapsed into single abstract nodes when zooming out would help retain the overall view on the graph. (2) Visual Dynamics. Networks characterized by fast and frequent changes also lead to many changes in the visualization.