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Recent advances in wireless sensor networks (WSNs) have led to many new promising applications including habitat monitoring and target tracking. Secure Routing is one of the important issues in wireless sensor networks. Several approaches have been proposed for secure routing in wireless sensor networks, but there is a lack of sufficient support for quick & secure routing in large-scale sensor networks. These networks are easily prone to security attacks since once deployed these networks are unattended and unprotected. Some of the inherent features like limited battery and low memory make...