A new framework for the verification of service trust behaviors

We propose in this paper a model checking framework for service trust behaviors. We devise a new trust behavior model, which is a deterministic PushDown Automaton (PDA) based trust behavior model. This model is built based on the observations' sequences, which are derived from the interactions with services. Furthermore, we express the regular and non-regular trust behavior properties using Fixed point Logic with Chop (FLC). The model checking of service trust behaviors with respect to trust properties is performed using a symbolic FLC model checking algorithm. Finally, we present some experiments to assess the efficiency of the proposed algorithm.