Enhanced DSR for Detection and Mitigation of Black Hole and Gray Hole Attacks in MANET

Abstract

Security in case of open medium network of MANET with dynamic environment is a big challenge. In simple
DSR [1] based MANET it simply finds the path to destination it has no provision to detect and mitigate black hole or
gray hole attack. So under attack DSR gives worst performance. In IDS based methods like in MDSR [2] the operation is
added to routing protocol. This operation can increase the routing overhead resulting in performance degradation of
MANET which is bandwidth-constrained. Even MDSR [2] is not efficient in preventing packet loss as it is seen that in the
proposed method black node is detected after occurrence of attack therefore, leading to higher packet loss. Hence, it is
very important to have very low computational complexity so that the detection operation is performed in a short time
without any loss of packets for real-time applications. Therefore, we have proposed an Enhanced DSR in which packet
loss is significantly low and have compared its performance with existing DSR [1] and MDSR [2]