Lossless authentication watermarking algorithm based on difference expansion in wireless sensor network
基于差值扩展的无线传感器网络无损认证水印算法*

To meet the demand of the original data in wireless sensor network (WSN) data authenticity in some sensitive data application scenarios, such as military, remote medicinal, and satellite remote sensing, this paper proposed a reversible watermarking scheme in WSN by using the difference expansion. It generated the watermark from the original data steams itself. To improve the watermark detection reliability, the scheme embeded the spread watermark into the WSN data streams. The original data stream could be losslessly recovered from the unaltered watermarked WSN data streams. Extensive experimental results demonstrate the effectiveness of the proposed scheme. It can achieve better transparency than some existing similar schemes. Meantime, it has good identification ability to illegal tampering.