Wireless adhoc network is autonomous and infrastructure less network. Wireless ad hoc network is particularly vulnerable due to its primary characteristics, like open medium, dynamic topology, distributed cooperation, and capability constraint. Routing plays an important role in the security of the entire network. Secure transmission of information in wireless adhoc environment is an important concern. Any attacker receive wireless signal by using transceiver and without being detected. Objective of this paper is to propose new approach for WSN security, i. e. Secure Energy Efficient ad hoc Routing (SEEAR) that consider cost of providing security and effects on energy efficiency. Shared cryptography[3] used for providing security. In this method information is divided into multiple shares and sent over multiple disjoint paths from transmitter to receiver at different point of time. At the receiver end the original information reconstructed by combining the shares received through different paths at different point of time. In this paper, cost for security in terms of time and its effect on energy efficiency is calculated. Also simulating the different types of attacks like wormhole, sink hole attack etc

Shared cryptography Secure energy efficient ad hoc routing