The Cyber-Physical Topology Language: Definition and Operations
As the number of security incidents and sophistication of those attacks increase, it is difficult to properly detect and diagnose malicious behavior. We conjecture that detection and diagnosis could be facilitated by an online “world view” that maintains information about the ability of a system to perform its intended function. We have thus developed the Cyber-Physical Topology Language (CPTL) to represent, exchange, and analyze information about a system in a dynamic fashion. In this thesis, we define a CPTL data model to represent cyber-physical assets within a system and the relations among them. We also define operations on CPTL that extract features of the system by generating a new CPTL data model that differs from existing CPTL data models in terms of topological, semantic and property changes. We then show how to integrate heterogenous data sources and detect intrusions by incorporating this model into a feedback loop. Finally, we show the applicability of our approach in an enterprise setting.
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