Date Added: May 2011
Trust plays an important role in protecting the security of mobile ad hoc networks. The node mobility brings challenge to trust propagation, where traditional graph-based propagation methods are difficult to apply. In this paper, the authors propose a trust establishment and propagation scheme by exploiting natural mobility of mobile ad hoc network nodes. They estimate the moving state of neighboring nodes, and select the group of nodes with higher movement diversity as the next hop. In this way, they expedite trust propagation with the help of mobility instead of treating it as a hurdle. Two classes of mobility models are considered: random direction model and cluster-based model.