International Journal of Technical Research & Applications (IJTRA)
In some critical application in Wireless Sensor Network (WSN) there is huge demand for authentication. Irreversible modification where made in watermarked data according to previous watermarking based approach. So, by using new technique on the basis of prediction error expansion and DCT, the authors are going to achieve the integrity of data in WSN. The authentication scheme based on this technique allows reversible modification in which sensor nodes placed at different location gather the stream data and non-overlapping authentication group composed of two adjacent data group. The first data group is going to compute watermark bits and these beats are embedded into consecutive group before transmission.