Download Critical Information Infrastructure Security: 6th by H. A. M. Luiijf, Kim Besseling (auth.), Sandro Bologna, PDF

By H. A. M. Luiijf, Kim Besseling (auth.), Sandro Bologna, Bernhard Hämmerli, Dimitris Gritzalis, Stephen Wolthusen (eds.)

This ebook constitutes revised chosen papers from the sixth foreign Workshop on serious details Infrastructure protection, CRITIS 2011, held in Lucerne, Switzerland, in September 2011. The sixteen complete papers and six brief papers offered during this quantity have been conscientiously reviewed and chosen from 38 submissions. They take care of all parts of serious infrastructure safeguard research.

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Extra info for Critical Information Infrastructure Security: 6th International Workshop, CRITIS 2011, Lucerne, Switzerland, September 8-9, 2011, Revised Selected Papers

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Trust and reputation is now a commonly used concept that is mostly focused on the development or refinement of trust models with application in areas like ecommerce web sites or, more generally, in situations where transactions between unknown systems or people occur [1]. The use of trust and reputation in the context of critical infrastructures has been proposed in [6,5] allowing the use of trust and reputation indicators in order to evaluate the correctness of dependency risk information exchanged among partner CIs and to be able to more accurately estimate the impact of received risks.

For example, it might be the case that B depends on A for water supply, say. This is formalised as D B D A : {water}. This asserts that B depends on A for water. More generally, for any two entities A and B, and a set of entities X (usually, services), the entailment D B D A : X means that B depends on A for all the “services” C ∈ X. We define a polymorphic failure predicate that can be used to assert the failure of entities in a model, such as the failure of nodes and edges. To assert the failure of an entity A (nodes and services) in the model, we simply specify fails(A).

3. Simulation example For service risk aggregation, the last information received from the sensors will be used. Only the evaluation of the system behaviour through the behaviour trust reveals that the behaviour of the system is not as he should be, as can be seen in Figure 3(B). It is shown that the behaviour trust indicator changes rapidly, as a result of the unreliable updates of the sensors. Figure 3(C) shows on the service level that, although the service risk is always 1, the service assurance indicates that the confidence in this risk estimation changes based on the dynamic behaviour observed by the risk alert trust indicator and the behaviour trust indicator.

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