Reputation-Based Security Protocol for MANETs
Mohammed Mujeeb1, Sudhakar K N2, Jitendranath Mungara3

1Mohammad Mujeeb, M.Tech, Computer Science and Engineering, CMRIT, Bangalore, India.
2Mr. Sudhakar K N, Associate Professor, Dept of CSE, CMRIT, Bangalore, India.
3Dr. Jitendranath Mungara, Professor and Dean, Dept of CSE and ISE, CMRIT, Bangalore, India.

Manuscript received on July 01, 2012. | Revised Manuscript received on July 05, 2012. | Manuscript published on July 10, 2012. | PP: 97-101 | Volume-1, Issue-2, July 2012. | Retrieval Number: B0168071212 /2012©BEIESP
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Abstract: Mobile Ad-hoc Network is huge area for research with practical applications. It is a infrastructureless and self-organized network, vulnerable because of its characteristics such as open medium, distributed cooperation and it is difficult to predict the topology. In general, Routing security in MANETs appears to be a challenging task. In this article we study the routing security issues of MANETs, and analyze in detail — the “Blackhole” attack. We come with distributed reputation mechanism that improves security in MANETS. Some optimization to the current reputation scheme used in MANETs are one is Selective Deviation tests and second is Adaptive expiration timer that aims to deal with congestion and quick reputation convergence. Cryptographic mechanisms such as Digital signature and hashing technique are used for the authentication of the packets in network. We design and build our proposed protocol over existing AODV and test in Network Simulator-2 in the presence of variable active Black hole attack. By using proposed Secure AODV (RSAODV) protocol we achieve increased throughput by decreasing packet delivery delay and packet drop. 
Keywords: MANET, RSAODV, Black hole, Routing, Digital Signature, Hashing