Sensor networks are highly distributed networks of small and lightweight wireless nodes deployed in hundreds of thousands to monitor the environment or system by the measurement of physical parameters such as temperature, pressure or relative humidity. Building sensors have been made possible by the recent advances in Micro-Electro-Mechanical Systems (MEMSs) technology. Cluster is a technique to join many networks. Wireless networks are susceptible to security attacks due to the broadcast nature of the communication standard. Here, the authors present the enhanced clustering technique to fine replica notes in WSN.