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MANET is a decentralized network that has no infrastructure and nodes can communicate with each other by multi-hoping the messages. Due to this nature of MANET, it is prone to many security attacks in which packet drop attacks are very common. Various packet drop attacks like Blackhole attacks, Grayhole attack, Co- operative Blackhole attack, etc are the attacks that become a bottleneck in efficient routing and security in MANET. Various mechanisms are devised in past but none of them prove to be effective against all types of packet drop attacks. In this paper, a mechanism is formulated that enhances the AODV routing protocol with Trueness Level and Cryptography for effectively counter all types of packet drop attacks by mitigating them through avoidance and elimination of source of attack after detection. This mechanism is powered by efficient use of Cryptography in its natural form. This work is compared with published work Extended Data Routing Information mechanism against various parameters like Packet Delivery Ratio, Normalized Control Load, Accuracy and Reliability in the same environment and parameters in MATLAB 2013a.

Avoidance and Mitigation of All Packet Drop Attacks in MANET using Enhanced AODV with Cryptography