Two Tier Secure AODV Against Black Hole Attack in MANETs
Mobile Ad hoc NETworks (MANET) poses many kinds of security problems, caused by their nature of collaborative open systems and by limited availability of resources. Most of the MANET routing protocols rely on cooperation between nodes due to the lack of a centralized administration and assume that all nodes are trustworthy and well-behaved. With the absence of security mechanism, in MANETs, it is easy for a node to intercept or modify the messages, thus attacking the normal operation of MANET. One such attack in MANET is Black hole attack, in which, a malicious node uses the routing protocol to advertise itself as having the shortest path to the node whose packets it wants to intercept.