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The increasing complexity of today's computer systems, together with the rapid emergence of novel vulnerabilities, make security hardening a formidable challenge for security administrators. Although a large variety of tools and techniques are available for vulnerability analysis, the majority work at system or network level without explicit association with human and organizational factors. This...
This paper reports an approach, which is termed AG-HMM, to achieve cost-effective security control by exploring logical attack graph to represent network observations, and Hidden Markov Model (HMM) to estimate attack states. One advantage of our approach is to construct a probabilistic mapping between network observations and attack states, potentially revealing the most significant vulnerabilities...
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