Securing AODV routing protocol in MANET using NMAC with HBKS technique

Secure transmission of information in MANET is a challenging task due to its fundamental characteristic like open shared wireless medium, physical vulnerabilities of the devices, infrastructure less, devices´ limited processing power, limited bandwidth etc. In this paper, we introduce a secure version the AODV routing protocol. The proposed method used the authentication technique like nested message authentication code to secure the routing packet in AODV and efficiently prevent most frequently occurred attacks such as black hole attacks, modifying routing information attacks and impersonation attacks. The key pre-distribution technique is used in proposed method to minimize the overhead caused by distributing and sharing the keys at the run time. In this paper, the technique of selecting the keys from key table according to value of hop count field in control packet is named as hop count based key selection technique. Our simulation result shows the advantage of our security mechanism over the previous method.