Trust Based Security Schemes in Mobile Ad Hoc Networks - A Review

Mobile Ad Hoc Network (MANET) is a distinct kind of network where the nodes are connected by way of wireless medium and without any infrastructure. Nodes in the network are fully dependent on other nodes so as to complete the communication successfully. In addition to this, nodes are moving freely and make dynamic topology. Moreover these types of network can be easily constructed whenever and wherever required. It offers plenty of applications, it also has its own weaknesses that are disturbing the network from a security perspective. In order to do the data transmission successfully, each node should trust other while forwarding node that is ensuring authentication to the receiver by the way of cooperating with each other. But achieving such cooperation in this distinct environment is too difficult. Though traditional cryptographic methods are there they are pre-determined, hence assumption is not always practical in dynamic network. To facilitate such issue trust is a prominent factor to defend against security issues in MANET. Our aim in this review is to present schemes which are mainly focused on trust based security for MANET and also discuss the needs and properties of trust and discuss the attacks that mainly affect the security and also discussed the traditional proposed security solutions.