¹Faculty of Information and Technology, Hue University of Sciences, Hue University, Viet Nam.
²Faculty of Mathematics and Informatics Teacher Education, Dong Thap University, Viet Nam.

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Abstract—Mobile Ad hoc Network is a collection of wireless mobile nodes that dynamically creates network without a fixed infrastructure. However, all the characters make the security problems, such as Blackhole, Grayhole attacks. In this article, we propose Valid Route Authentication mechanism (VRA) for security, and integrating VRA into the discovery route process of AODV protocol. Improved protocol named VRA-AODV which can detect Black and Grayhole attacks. Using NS2, we compare the performance of AODV and improved protocols in the mobility nodes topology under attacks. Simulation results show that improved protocol has better performance AODV based on packet delivery ratio, network throughput and routing load metrics.

Index Terms—AODV, MANET, VRA-AODV, network attacks, protocol, security.

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Cite: Thanh-Tu Vo, Thai-Ngoc Luong, "VRA-AODV: Routing Protocol Detects Blackhole and Grayhole Attacks in Mobile Ad hoc Network," Journal of Computers vol. 13, no. 2, pp. 222-235, 2018.