Wireless Sensor Networks (WSNs) are used for the applications like military, health-related, ecological area. These applications include monitoring of sensitive information such as enemy movement at battlefield, or the location of personnel in the building. Wireless sensor nodes sense around them and detect anomaly event in the industrial environment. For the industrial application it is difficult to detect the intrusion on wireless medium. Intrusion detection is most essential requirement for security purpose. Security issues are discussed and apply the security algorithm on the nodes.