Detection of Black Hole Attack Using Code Division Security Method

A mobile Adhoc network (MANET) is a collection of mobile nodes to form a temporary network without use of any predefined infrastructure. Direct communication is possible only when two nodes lie within their sensing range; otherwise communication is made through intermediate nodes till the destination is reached. Such type of networks can allow any node to join in the network or leave the network at any instant of time. So any node can act as a host or the router in the network, which results in security issues in MANETs. A well known attack in MANETs is a Black hole attack. In this paper, we present a simple but effective method called Code Division Security Method (CDSM) for security in order to prevent Black hole attack in MANETs. Black hole node is a malicious node which can mislead a normal node to forward the data through it and corrupt the data so that it can degrade the performance of the network. We validate our approach using network simulator with an example.