Wireless sensor networks often consists of a large number of low-cost sensor nodes that have strictly limited sensing, computation, and communication capabilities. Due to resource restricted sensor nodes, it is important to minimize the amount of data transmission so that the average sensor lifetime and the overall bandwidth utilization are improved. Data aggregation is the process of summarizing and combining sensor data in order to reduce the amount of data transmission in the network. As wireless sensor networks are usually deployed in remote and hostile environments to transmit sensitive information. Wireless Sensor Network (WSN) is an emerging technology which has a wide array of applications. These applications include infrastructure protection, industrial sensing and diagnostics, battle- field and environmental monitoring, building’s micro-climate controls system, biological and nuclear attack detection, context–aware computing such as intelligent home and responsive environment. This kind of networks usually consists of a large number of resource-constrained sensor nodes that are usually deployed randomly or uniformly in the sensing area to monitor physical conditions such as humidity and temperature in that area. The modified version conducts the setup phase according to certain rules and schedule, with performs this step at the beginning of some rounds. The problem of attackers is a major issue that created in the network while doing the rotation. Hence the proposed system uses an energy efficient routing that detect the malicious node in the route to provide reliable communication.