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dc.contributor.advisor Trivedi, Kishor S. en_US
dc.contributor.author Roy, Arpan en_US
dc.date.accessioned 2011-01-06T20:46:03Z
dc.date.available 2011-01-06T20:46:03Z
dc.date.issued 2010 en_US
dc.identifier.uri http://hdl.handle.net/10161/3148
dc.description Thesis en_US
dc.description.abstract <p>Attack tree (AT) is one of the widely used non-statespace</p><p>models in security analysis. The basic formalism of AT</p><p>does not take into account defense mechanisms. Defense trees</p><p>(DTs) have been developed to investigate the effect of defense</p><p>mechanisms usinghg measures such as attack cost, security</p><p>investment cost, return on attack (ROA) and return on investment</p><p>(ROI). DT, however, places defense mechanisms only at the</p><p>leaf nodes and the corresponding ROI/ROA analysis does not</p><p>incorporate the probabilities of attack. In attack response tree</p><p>(ART), attack and response are both captured but ART suffers</p><p>from the problem of state-space explosion, since solution of</p><p>ART is obtained by means of a state space model. In this</p><p>paper, we present a novel attack tree paradigm called attack</p><p>countermeasure tree (ACT) which avoids the generation and</p><p>solution of the state-space model and takes into account attacks as</p><p>well as countermeasures (in the form of detection and mitigation</p><p>events). In ACT, detection and mitigation are allowed not just at</p><p>the leaf node but also at the intermediate nodes while at the same</p><p>time the state-space explosion problem is avoided in its analysis.</p><p>We use single and multiobjective optimization to find optimal</p><p>countermeasures under different constraints. We illustrate the</p><p>features of ACT using several case studies.</p> en_US
dc.subject Electrical Engineering en_US
dc.subject Computer Engineering en_US
dc.subject Computer Science en_US
dc.subject attack countermeasure trees en_US
dc.subject mincuts en_US
dc.subject non-state-space model en_US
dc.subject optimization en_US
dc.subject return on investment en_US
dc.title Attack Countermeasure Trees: A Non-state-space Approach Towards Analyzing Security and Finding Optimal Countermeasure Set en_US
dc.type Thesis en_US
dc.department Electrical and Computer Engineering en_US

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