10-04-2017, 09:36 PM
solution for black hole attack tcl script
Abstract
Mobile Ad-hoc Network (MANET) has been an active research area as it has the special features such as fast,dynamic and easy to deploy anywhere. Absence of central monitoring unit, MANET highly depends on mobile nodes reliability. This leads MANETs are more vulnerable to various communication security attacks. One of the main active attacks is Black hole attack, it is a denial of service attack and it drops entire incoming packets between one source to destination. The attempt is to focus on analyzing and strengthening the security of routing protocol Ad-hoc On Demand Distance Vector (AODV) for MANET. The Proposed Method PL2 has the modification done in AODV protocol for ensuring the security against the Black hole attack using NS2 Simulation.
Introduction
A Mobile Ad hoc Network (MANET) comprises of mobile nodes that moves independently in an open environment. Communication between the nodes in a MANET is enabled with the aid of intermediate routers. The nature of MANET such as open medium, dynamic network topology, lack of centralized monitoring, and lack of clear defense mechanisms makes it vulnerable to several routing attacks. In MANET routing, there is a high probability for intermediate nodes to be malicious that might be a threat to the security. Blackhole is the common attack in ad hoc routing in which the malicious node uses the process of routing to state itself of being the shortest path to the destination. Once it receives the data packets, it drops the data packets instead of forwarding them to its neighbors. In sample20.tcl, the blackhole attacker does not obey the communication model. Data Transmission is established between nodes using UDP agent and CBR traffic. Sender sends the data via attacker. Source node transfers data to attacker that does not have shortest route to Destination. Attacker does not forward data to its neighbors