Trust Based Secure Gateway Discovery Mechanism for Integrated Internet and MANET

The Integration of MANETs and infrastructure networks such as Internet, extends network coverage and increases the application domain of MANET. Several strategies exist for integration of two networks. Most of them presume that a non-adversarial environment prevails in the network. However such an ideal scenario is not always guaranteed. Nodes many behave maliciously due to scarcity of resources, congestion, or malicious intentions. In this paper a trust based, load aware, and secure gateway discovery for IIM is proposed. It employs the concept of mutual trust and authentication among nodes to prevent malicious activities. However a notable exception is that a node may experience packet-drop due to congestion on route or overflow in the interface queue of an intermediate node; this is not a malicious behaviour. In order to avoid such false malicious behaviours, we employ an effective and adaptive load balancing scheme to avoid congested routes. Thus it would be a novel strategy that ensures the routing in the Integrated Internet and MANET to be trustworthy, secure, efficient, and robust.