Abstract
Most current cloud systems involves a data center model, in which clusters of machines dedicated to run cloud infrastructure software. Ad-hoc cloud model, in which infrastructure software distributed over resources harvested from machines already existed and used for other purposes, are gaining popularity. And as a try to utilize mobile devices power an ad-hoc mobile clouds model introduced. In this chapter, a trust management system (TMC) for mobile ad-hoc clouds is proposed. This system considers availability, neighbors? evaluation and response quality and task completeness in calculating the trust value for a node.