A Flexible Policy-Driven Trust Negotiation Model

Policy-driven negotiations are gaining interest among the research community. A large number of policy languages with different expressiveness have been developed in order to suit different scenarios. This paper summarizes the general requirements a negotiation framework must cover and presents a flexible negotiation model that addresses all these requirements and subsumes existing models to date. An instantiation of this model and an architecture with reusable components that integrates two existing trust negotiation languages (PEERTRUST and PROTUNE) are provided.