Intrusion detection is one of the methods of defending against these attacks. In the proposed a security protocol for homogeneous wireless sensor network; network with all nodes are of same type. Clustering is used to improve the energy efficiency. Zone-Based Cluster Protocol (ZBCA) is used for selection of cluster head which is effective in scalability and energy consumption. Single hop technique is used for communication within normal nodes and cluster head to base station. Simulation of proposed algorithm is performed in Matlab. Sleep deprivation attack has been analyzed where attacker changes the environmental values by an artificial event.