Detection and Isolation of Multiple Black Hole Attack Using Modified DSR

Mobile Ad hoc Network is a robust infrastructure less wireless network. It can be formed either by mobile nodes or by both fixed and mobile nodes. Nodes are randomly connected with each other and forming arbitrary topology. MANET is susceptible to various routing attacks which hinder the security of the network. The routing attack addressed in this paper is the black hole attack in DSR protocol of MANET. In the Black hole attack a malicious node advertises itself as the best shortest route to the destination. This paper describes a strategy to detect and isolate the multiple black hole attack in MANETs.

Keywords : MANET, Black hole attack, DSR