期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2014
卷号：68
期号：2
出版社：Journal of Theoretical and Applied
摘要：An ad hoc network is a collection of wireless computers (nodes), communicating among themselves over possibly multihop paths, without the help of any infrastructure such as base stations or access points. Due to MANET characteristics, nodes in MANET are easily compromised by the adversaries. In this paper an innovative scheme is proposed to monitor and detect the malicious nodes without compromising the network performances. The major contribution is to alleviate the Watchdog (IDS for MANET) issues such as limited transmission power, packet dropping, receiver collision and false misbehavior reports generation. The proposed approach is an acknowledgement based, in which each acknowledgement packet is digitally signed with an Elliptic Curve Cryptography (ECC) algorithm for authenticating the acknowledgement packets. Simulation results demonstrate that the proposed scheme offer more security and improve the network performances than earlier IDS approaches. The proposed system improves the packet delivery ratio and also minimizes the routing overhead even in the presence of 40% malicious nodes in the network.
