Commoditizing idle computing resources by sharing them in a marketplace has gained increased attention in recent years as a potential disruption to the modern cloud-based service delivery. Recent initiatives have focused on scavenging for idle resources and provide suitable incentives accordingly. A recent work on resources marketplace has proposed a Marketplace for Compute Infrastructure that not only allows resource owners to get incentives by sharing resources to the marketplace but also ensures Service Level Agreements (SLAs), such as performance guarantees, for the computing jobs to be run by the shared resources. This paper proposes a Trust for Resource Marketplace (TRM) system that computes the trust level among the entities in a resource marketplace (RM), by incorporating key aspects of the interactions among these entities. In particular, an RM has three kinds of entities: users (with task requests), resources (on which task is executed), and resource owners. Over these entit...