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...y exploiting the analytical tools already developed for cows, such as the stochastic extension defined in [25] that enables quantitative reasoning on service behaviours, the type system introduced in =-=[17]-=- that permits to check confidentiality properties, and the logic and model checker presented in [10] that permits expressing and checking functional properties of services. Acknowledgements. We thank ...

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...and semantics and are not easily extended beyond the original context of the pi-calculus. In the context of COWS, Lapadula et. al. use type systems in order to enforce distribution policy annotations =-=[8]-=-. For this approach to work the user has to annotate each piece of data with a region of maximal dissemination (a set of service principals). Static inference combined with a typed semantics, performi...

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... the analysis of SRML models by exploiting the reasoning mechanisms and verification techniques that are being made available for COWS. These include a type system to check confidentiality properties =-=[21]-=-, a stochastic extension to enable quantitative reasoning on service behaviours [29], a static analysis to establish properties of the flow of information between services [5], and a logic and a model...

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...nted in Section 2. Since the definition of the calculus, a number of methods and tools have been devised to analyse COWS specifications, such as the type system to check confidentiality properties of =-=[17]-=-, the stochastic extension to enable quantitative reasoning on service behaviours of [22], the static analysis to establish properties of the flow of information between services of [3], the bisimulat...

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...hile modelling their dynamic behaviour. Since its definition, a number of methods and tools have been devised to analyse COWS specifications, such as a type system to check confidentiality properties =-=[17]-=-, a logic and a model checker to express and check functional properties of services [11], a stochastic extension to enable quantitative reasoning on service behaviours [22], a static analysis to esta...

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...the tools and methodologies developed for COWS for the analysis of UML4SOAmodels of services. Thus, given a service specification, one can check confidentiality properties by using the type system of =-=[13]-=-, information flow properties using the static analysis of [3], functional properties using the logic and the model checker of [9], and quantitative properties using the stochastic extension introduce...

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...hile modelling their dynamic behaviour. We present (an excerpt of) COWS main features and syntax while modelling some simplified components of the on road car repair scenario. The type system of COWS =-=[10]-=- enables us to verify confidentiality properties, e.g., that critical data such as credit card information is shared only with authorized partners. The complete specification, including compensation a...

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...us could permit to extend our framework to other classes of properties by integrating the appropriate tools. Thus, for example, we could verify confidentiality properties by using the type system of (=-=Lapadula et al., 2007b-=-), information flow properties using the static analysis of (Bauer et al., 2008) and quantitative properties using the stochastic extension of COWS introduced in (Prandi and Quaglia, 2007). References...