Abstract:
A mobile ad-hoc network (MANET) is a collection of mobile devices that used wireless communications capability without any central network authority or infrastructure. Due to its dynamic behavior and lack of central authority security becomes the challenging task for this network. Nodes can get compromised from various types of threats such as black hole and wormhole attacks. Black hole attack is a type of routing attack where a malicious node advertises itself as having the shortest path to the node whose packets it wants to intercept. It can be used as a denial-of-service attack where it can drop the packets. This work focuses on evaluating the security of one of the popular routing protocol for MANETs, namely the Ad hoc On Demand Distance Vector (AODV) routing protocol to avoid black hole attacks. The proposed Intrusion Detection System AODV (IDSAODV) and AODV Uppsala University (AODV-UU) are considered as modification of the AODV protocol and they used to detect and avoid black hole attacks. A comparative evaluation performance is done for the protocols; AODV, IDSAODV, AODV-UU with Network Simulator NS-2.32. The Simulation has been carried with and without black hole attacks on different parameters, namely; routing overheads, packet delivery ratio and average delay for each of the three versions of the AODV protocol. Results proved that AODV-UU has all the advantages of IDSAODV and AODV when black hole is used or not. It has higher throughput, lower delay and lower routing overhead. However, quality of service decreases severely when number of node increases.
