Wireless sensor network data authentication method based on reversible watermark

Abstract

The invention discloses a wireless sensor network data authentication method based on reversible watermarks, which comprises the following steps of: grouping original data streams according to a dynamic grouping mode, and enabling two adjacent groups to be a verification group; generating a watermark sequence by the generation group, solving an initial prediction item, and embedding the initial prediction item into the carrying group; when data is transmitted, adding an additional decimal bit to the last bit of the data as a flag bit for judging a pseudo synchronization point; sending the verification group data embedded with the watermark to a sink node; extracting data, decoding and dynamically grouping; judging whether the mark check bit is a or not, and if yes, judging that the data is not a synchronization point; detecting whether the watermark sequence generated by the generation group is consistent with the watermark sequence extracted by the carrying group, and if not, indicating that the data is tampered; carrying out dual authentication, when tampering is detected, it is judged that the whole verification group does not pass authentication, and detection continues from the next group. According to the invention, the false alarm rate and the false detection rate are effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of network security, and in particular relates to a wireless sensor network data authentication method based on a reversible watermark. Background technique [0002] With the increasing application of Wireless Sensor Networks (WSNs), its security issues are gradually exposed. Once the real-time data is tampered with by hackers, the damage will be huge. Therefore, it is very necessary to conduct integrity data authentication for wireless sensor networks, but traditional cryptography techniques are not suitable for such networks due to complex algorithms and high costs. In recent years, information hiding technology, as a method to protect communication security, has been highly valued by researchers. Digital watermarking technology is an important branch of information hiding technology, and its purpose is to embed specific digital signals into digital products to protect the copyright or integrity of produ...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the characteristics of low detection efficiency in the prior art, the present invention provides a wireless sensor network data authentication method (DAHDE) based on reversible watermark, and solves the problem of false alarm rate caused by grouping by using the method of flag check bit , and at the same time reasonably design the grouping threshold to minimize the false detection rate, so as to improve the success rate of data authentication

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