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In this paper, the problem of measuring normality in HTTP traffic for the purpose of anomaly-based network intrusion detection is addressed. The work carried out is expressed in two steps: first, some statistical analysis of both normal and hostile traffic is presented. The experimental results of this study reveal that certain features extracted from HTTP requests can be used to distinguish anomalous...
In this work a general framework, termed NSDF, for describing network systems is proposed. Basic elements of this scheme are entities and the relationships established between them. Both entities and relationships are the basis underlying the concept of system state. The dynamics of a network system can be conceived of as a trajectory in the state space. The term action is used to describe every event...
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