The security of wireless sensor networks is a challenging problem in the process of data aggregation. As data are send though sensor network confidentiality plays and important role between sink and destination. An efficient secure data aggregation is proposed to enhance the data security of wireless sensor networks. In wireless sensor networks, compromised sensor nodes can inject false data during both data aggregation and data forwarding. The existing false data detection techniques consider false data injections during data forwarding only and do not allow any change on the data by data aggregation. However, In this paper we can see how the data is being remain confidential between sink and destination by using Data authentication method for securing the data in wireless sensor network.

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