Ensuring trustworthiness through mobile nodes is a serious issue. Indeed, securing the routing protocols in Mobile Ad Hoc Network (MANET) is of paramount importance. A key exchange cryptography technique is one such protocol. Trust relationship between mobile nodes is essential. Without it, security will be further threatened. The absence of infrastructure and a dynamic topology changing reduce the performance of security and trust in mobile networks. Current proposed security solutions cannot cope with eavesdroppers and misbehaving mobile nodes. Practically, designing a key exchange cryptography system is very challenging. Some key exchanges have been proposed which cause decrease in power, memory and bandwidth and increase in computational processing for each mobile node in the network consequently leading to a high overhead. Some of the trust models have been investigated to calculate the level of trust based on recommendations or reputations. These might be the cause of internal malicious attacks. Our contribution is to provide trustworthy communications among the mobile nodes in the network in order to discourage untrustworthy mobile nodes from participating in the network to gain services. As a result, we have presented an Elliptic Curve Diffie-Hellman key exchange and trust framework mechanism for securing the communication between mobile nodes. Since our proposed model uses a small key and less calculation, it leads to a reduction in memory and bandwidth without compromising on security level. Another advantage of the trust framework model is to detect and eliminate any kind of distrust route that contain any malicious node or suspects its behavior.

In recent years, mobile computing has become an integral part of society. As the cost of laptops and wireless networking hardware has declined, society has become increasingly connected. High speed wireless internet access is increasingly becoming part of our daily lives. As a result of this dependence on instant access to information, there is a growing need to create wireless networks without having access to a fixed networking infrastructure. Instead of relying in fixed infrastructure, these mobile nodes can be joined to create an ad hoc network to facilitate information sharing. The ad hoc nature of these networks requires different protocols than traditional networks. This research is motivated by the observation that radio communications are greatly affected by the physical environment. In hilly or urban environments, the performance of a wireless network is much lower than in large open areas. However, MANET protocols typically consider the physical environment only when it causes a change in connectivity. We examine whether the network can estimate the physical environment and predict its impact on the network, rather than waiting to react to the physical environment. This research demonstrates the feasibility of using terrain and location information to improve routing in mobile ad hoc networks through the development of a distributed routing algorithm that uses location and digital terrain information to efficiently deliver packets in a mobile ad hoc network. Through a comprehensive set of simulations, we show that the new algorithm performs better than current MANET protocols in terms of standard metrics: delay, throughput, packet loss, and efficiency.

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