Abstract

We propose a new routing protocol, which is anonymous secure routing (AASR), to satisfy the requirement and defend the attacks. the route request packets are authenticated by a group signature, the potential active attacks without unveiling the node identities. The key-encrypted onion routing with a route secret verification message, is designed to prevent intermediate nodes from inferring a real destination.We address fault tolerance in wireless sensor networks .In sensed data streams indicate the spread of malicious attacks, hardware failure and software corruption among the different nodes in a Wireless Sensor Network. we start by providing a short summary of sensor networks and classical fault tolerance techniques in the system, we discuss the three phases of fault tolerance detection and identification at four levels of abstractions (hardware, system software, middleware, and applications) and four scopes the factors of the node infected can be generated and incoming data streams resulting in chances of inaccurate data misleading packet transmission wrong decision making and server communication disruption. Wireless sensor network composed of very large number of low cost micro-sensors. A wireless sensor network of the type refer a group of the sensors, or node, that are linked by a wireless medium to perform the distributing the sensing tasks. With the new system like micro-electro-Mechanical system(MEMS) technology taking low power in wireless sensor network communication. Now the big challenge is that to produce the wireless sensor nodes at low cost. The network is used to collect and send the various types of data and message to the destination. The low cost WSN has the limited battery power and the replacing the battery is the not a solution in the network because large nodes will be there.