Application Research Of Digital Watermarking Technology In Wireless Sensor Network

Wireless Sensor Network(WSN)is a distributed network with broad application prospects.However,wireless sensor nodes are very fragile and vulnerable to attacks.Due to limitations of energy,bandwidth,and data processing capabilities,traditional network security technologies are not well suited for WSNs.Digital watermarking technology embeds watermark information into original data without increasing data overhead.Applying digital watermarking technology to network security authentication has become a research hotspot in the field of wireless sensor networks security.In this paper,a watermark authentication algorithm based on dynamic grouping is designed and applied to the wireless sensor networks information integrity authentication system.The algorithm has low computational power requirements,does not add additional data,consumes less energy,and has good authentication effects.main tasks as follows:Firstly,this paper analyzes the advantages of digital watermarking technology applied to WSNs and determines the feasibility of the algorithm.For the key algorithms such as Logistic map,SHA-256 and reversible watermarking based on parity invariance in digital watermarking technology,this paper makes an in-depth study and improves the results of the algorithm.Secondly,a dynamic packet-based watermark authentication algorithm is designed.The algorithm dynamically groups the collected raw data to avoid probabilistic attacks.A watermark generation algorithm suitable for dynamic grouping is given and the algorithm is tested.The algorithm has high recognition rate for data tampering,good authentication effect,and does not destroy the accuracy of the original data,and has low energy consumption,and is suitable for WSNs.Finally,the wireless sensor network authentication system is designed and implemented,and the designed watermark algorithm is applied in practice.The system adopts the ITP-4412 main board development,selects DS18B20 temperature sensor and MT7601 chip to complete data acquisition and wireless transmission,and realizes functions such as data acquisition,data authentication,node management and data storage analysis.The system works well,and the feasibility and effectiveness of the dynamic packet-based watermark authentication algorithm in wireless sensor networksecurity authentication is further verified.