Abstract—Mobile ad hoc networks (MANETs) are mainly used for communication between nodes in a network. A major problem to be addressed is the presence of malicious nodes in the network. These malicious nodes may discard the data packets completely or partially. These attacks are called as blackhole and grayhole attacks. These attacks lead to serious security concerns, such nodes may disrupt the routing process. As MANETs are used in different fields like military, medical, etc., preventing or detecting malicious nodes launching grayhole or collaborative blackhole attacks is a challenge. To resolve this issue Dynamic Source Routing (DSR)-based routing mechanism, which is referred to as the Enhanced Cooperative Bait Detection Scheme (ECBDS), that integrates the advantages of both proactive and reactive defense methods. In ECBDS method the destination node involves in the malicious node detection process, thereby avoiding loss of data packets. Simulation results, show that in the presence of malicious-node attacks, the ECBDS outperforms the existing DSR protocols in terms of packet delivery ratio and routing overhead.

Index Terms—MANETs, CBDS, DSR, Blackhole and grayhole attacks, Packet delivery ratio, Routing overhead

Cite: M Beneto Nixon, A Swarnalatha and R Avudaiammal, "DETECTION OF COLLABORATIVE ATTACKS IN MANETS USING ENHANCED CBDS TECHNIQUE," International Journal of Electrical and Electronic Engineering & Telecommunications, Vol. 1, No. 1, pp. 16-25, March 2015.