Service oriented modeling of communication infastructure for assurance

To be able to achieve security assurance for services, which run on large and complex communication infrastructures, support tools are needed. Such tools need a representations of the infrastructure that enables and provides security assurance. In this paper we suggest an assurance modeling profile for UML 2.0. The profile contains stereotypes that define assurance-relevant object types as observed and unobserved assurance-relevant infrastructure items or metrics. In addition, the model defines information relevant for the aggregation of assurance, to allow an assurance value for a service to be derived from its underlying infrastructure. Our modeling approach starts from a service-oriented flow model and stepwise refines the topology and hierarchy view of the infrastructure involved in the service. To validate our approach we model a voice-over-IP service and show how the approach satisfies initially stated requirements