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dc.contributor.authorRao, Nageswara S. V.
dc.contributor.authorMa, Chris Y.T.
dc.contributor.authorHausken, Kjell
dc.contributor.authorHe, Fei
dc.contributor.authorYau, David K.Y.
dc.contributor.authorZhuang, Jun
dc.date.accessioned2018-06-21T09:04:03Z
dc.date.available2018-06-21T09:04:03Z
dc.date.created2018-04-26T14:57:15Z
dc.date.issued2018
dc.identifier.issn1424-8220
dc.identifier.urihttp://hdl.handle.net/11250/2502429
dc.descriptionhttps://doi.org/10.3390/s18051421
dc.description.abstractWe consider infrastructures consisting of a network of systems, each composed of discrete components. The network provides the vital connectivity between the systems and hence plays a critical, asymmetric role in the infrastructure operations. The individual components of the systems can be attacked by cyber and physical means and can be appropriately reinforced to withstand these attacks. We formulate the problem of ensuring the infrastructure performance as a game between an attacker and a provider, who choose the numbers of the components of the systems and network to attack and reinforce, respectively. The costs and benefits of attacks and reinforcements are characterized using the sum-form, product-form and composite utility functions, each composed of a survival probability term and a component cost term. We present a two-level characterization of the correlations within the infrastructure: (i) the aggregate failure correlation function specifies the infrastructure failure probability given the failure of an individual system or network, and (ii) the survival probabilities of the systems and network satisfy first-order differential conditions that capture the component-level correlations using multiplier functions. We derive Nash equilibrium conditions that provide expressions for individual system survival probabilities and also the expected infrastructure capacity specified by the total number of operational components. We apply these results to derive and analyze defense strategies for distributed cloud computing infrastructures using cyber-physical models.
dc.language.isoeng
dc.subjectnettverkssystemer
dc.subjectcyber-physical infrastructures
dc.subjectinformasjonsteknologi
dc.titleDefense Strategies for Asymmetric Networked Systems with Discrete Components
dc.title.alternativeDefense Strategies for Asymmetric Networked Systems with Discrete Components
dc.typePeer reviewed
dc.typeJournal article
dc.description.versionpublishedVersion
dc.subject.nsiVDP::Teknologi: 500::Informasjons- og kommunikasjonsteknologi: 550
dc.source.volume18
dc.source.journalSensors
dc.source.issue5
dc.identifier.doi10.3390/s1805142
dc.identifier.cristin1581906
cristin.unitcode217,7,5,0
cristin.unitnameInstitutt for medie- og samfunnsfag
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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