Digital Watermarking Method for Data Integrity Protection in Wireless Sensor Networks

Wireless sensor networks are self-organized and data-centric, which have been well applied in many practical areas. But in these applications, data integrity from sensors has not been verified. Thereby in this paper, we have proposed a novel data integrity protection strategy based on digital watermarking technologies, mwhere source sensors use a one-way hash function for collected data to create watermark information, and then make it associated with the data by embedding it into the redundant space of the targeted bytes. At the base station side, a watermarking algorithm is designed to extract the watermarking information, which is compared to recalculated watermarking information to verify the integrity of the data during the transmission. Compare to other watermarking methods, our algorithm does not increase extra data storage space and remain data accuracy. According to the results of extensive experiments, our algorithm can effectively protect the integrity of the data and has more application values.