Security Inopportunistic Networks

Opportunistic Networks is an evolution of delay-tolerant networks and mobile ad-hoc networks which has a widespread uses in both of civilian and military. However, the security problems in opportunistic networks are increasingly serious due to its natural characteristics of extreme intermittent and self-organized. In this paper, we present the key issues and challenges in opportunistic networks at different network layers. Then we analyze the related security schemes including the key management, security routing, privacy and trust management. Based on these discussions, finally we point out the potential future research directions on the security in opportunistic networks.