Reduce Impact Blackhole Attack in AODV Protocol
Keywords:
AODV, SPAODV, Blackhole attack, Routing Overhead, NS2Abstract
One of the most famous technologies in the networks is MANET technology, which is used in medical, military and other fields. MANET is a group of nodes that connect between them without the access point. AODV protocol is not provided with protection mechanisms because the primary purpose of this protocol is to quickly deliver packets to the destination. This is the main reason for its being attacked by malicious nodes. One of these attacks is a blackhole attack where the malicious node sends a fake message to the source that the shortest path to the destination passes through this malicious node. Then, the packets are dropped, which reduces the effectiveness and performance of AODV. In this paper, we proposed a SPAODV method to protect from blackhole attack and reduce its impact. In the SPAODV method, after the source node receives an RREP message, CHECKVERIFY will be sent to all proposed routes to confirm the route to the destination by the source node. The desired destination is the only node that can confirm the validity of the path by sending VERIFY to the source. Results of simulation by using NS2 showed that the SPAODV method better protection and better performance in AODV under blackhole attack networks compared to an EAODV method and a MAODV method.
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