The nodes in Mobile Ad Hoc Network are mobile continuously moves in limited area and having fixed range of communication but it is possible to vary range according to requirement of functioning. The mobile nodes are energy dependent and consume energy in every commotion like sending packets, sensing neighbour and receiving. The attacker in network is consumes the valuable energy resource by flooding large amount of data packets to all mobiles unnecessary. In this research we proposed the security scheme for three attacks like Blackhole attack, Jamming attack and Vampire attack. The malicious functioning of attacker are different one is packet dropping and rest of two is flooding unwanted packets.. In this research work the proposed security scheme is identified the flooding status of jamming as well as Vampire attacker. The proposed scheme is collect the information of attacker on the basis of heavy flooding unnecessary energy consumption. The attacker information is also broadcast to other nodes to not communicate with attacker after blocking communication capability of nodes The Jamming attacker aim is to consume the resources at most of the time because of that the routing performance is affected. The proposed work is provides the reliable routing scheme to improve network performance in minimum energy cost. The minimum energy consumption enhances the possibility of communication, which enhance network lifetime. The performance of attack, existing scheme and proposed security scheme is evaluated through performance metrics like percentage of receiving, Overhead, data drop and Average energy consumption.

Attack, Energy, flooding, Routing, Security, DTN

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