Abstract
Trust and cooperation among mobile ad hoc network (MANET) nodes affects the performance and lifetime of the network. Due to dynamic nature of MANET nodes, they are exposed to various security attacks. To increase the security in MANET, it is vital to measure the trustworthiness of the nodes in the network. Trust and reputation based approaches provides an effective and efficient way to identify selfish and malicious nodes in the network. Trust management techniques evaluate trust of the nodes participating in the network and compel them to cooperate among nodes in a normal way. Trust management system can also be vulnerable to various attacks as other security schemes. In this paper, a discussion on the concept, properties and unique characteristics of trust in MANET is provided. Further, an analysis of potential attacks in MANET is also done. A survey on the trust management methods developed for MANET is provided with future research direction in trust management in MANET.
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