期刊名称：International Journal of Wireless & Mobile Networks
印刷版ISSN：0975-4679
电子版ISSN：0975-3834
出版年度：2013
卷号：5
期号：5
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：Due to this above discussed nature of MANET, networks are more vulnerable to attacks than wired networks. So security is an important issue in MANET to provide secure communication between mobile nodes. Sometimes the nodes in the network show misbehaviour, depending on which nodes may be identified by two categories: malicious nodes or selfish nodes. Malicious nodes attack the network in several ways to disrupt the normal routing process where as selfish nodes take part in routing but show selfish kind of behaviour like selective forwarding, packet dropping etc. Due to all these misbehaviour of nodes, performance of MANET degrades. To overcome this problem secure routing protocols need to design which is a more difficult and challenging too. Different approaches are already proposed to secure the routing process in MANET. Cryptographic mechanisms are used in routing protocols to secure the routing information from tampering it by the attacker. But this approach can't be deployed in real MANET network because of high computational cost and it can't identify the attacker nodes. This mechanism only secures the routing information from tampering but can't secure nodes that participate in routing. So the trust mechanism is adopted in routing protocols to secure nodes as well as the data transmission. Trust is taken as a parameter while nodes are selected for routing. Trust on nodes may be determined by the direct or indirect communication with the nodes. Different trust based routing protocols are proposed to provide security in MANET by securing nodes in routing path
