Abstract
Mobile Ad hoc Network is a collection of mobile nodes that communicate with each other without base station. These networks are developed instantly or on-demand when some nodes come in the mobility range of each other and decide to cooperate for data transfer and communication. MANETs are more vulnerable to various types of attacks due to its deployment nature. The security in the mobile ad hoc network is very hard to achieve because of its fundamental characteristics such as dynamic topology, open medium, limited power, limited bandwidth and remote transmission. The prevention mechanisms like cryptography or authentication alone cannot detect malicious nodes in Ad-hoc networks. Hence we propose and implement a new intrusion detection system named Enhanced Adaptive Acknowledgement method specially designed for MANETs. Using MRA scheme, this method is capable of detecting malicious nodes even in the presence of false misbehavior report. Compared to other detection methods, this method is capable of detecting high malicious nodes and hence increases the security and network performances.
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