Abstract: In wireless sensor Networks security is one of the important problems we are facing. To provide redundancy management for heterogeneous wireless sensor networks (HWSNs) utilizing multipath routing to answer user queries in the presence of unreliable and malicious nodes. In this paper use a Multipath Routing, it is the routing technique of using multiple alternative paths through the network. The objective of redundancy management of multipath routing minimizes the energy loss and gain in reliability, timeliness and security to maximize the system lifetime. Here a voting based intrusion detection algorithm used to detect and evict malicious nodes. We plan to explore more extensive malicious attacks for packet dropping and bad mouthing attacks with implications to energy reliability and security, and investigate.