Clustering is an effective and practical way to enhance the system performance of Wireless Sensor Networks (WSNs). In WSNs, it is highly a difficult task to achieve secure data transmission. In existing system, some of the protocols such as SecLEACH, GS-LEACH and RLEACH were used, but orphan node problem exists. Thus by using these protocols, the orphan node problem is solved due to Node-to-node communication. Secure data transmission for Cluster-based WSNs (CWSNs) can be provided with help of protocols.