Composing trustworthy context-dependent services

The two key issues in service-oriented applications should be that every provided service meets the expected trust level set by the service requester, and the provided service satisfies its contract in the context of service provision. In order to enforce these issues, it is necessary to specify in the service its trustworthiness properties, and the relationship between its contracts and the contexts in which it is to be provided. However, current approaches have failed to specify them. To remedy this situation, we have presented a new service model (ConfiguredService) and a new service provision framework (FrSeC). In this paper, we focus on the composition of trustworthy context-dependent services as supported by ConfiguredService and FrSeC.