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Research on Information Security Based on Digital Watermarking

Author: PeiXiaoGen
Tutor: MaLei
School: Shandong University
Course: Circuits and Systems
Keywords: SVD DFT Dual Digital Watermarking Information Security Robustness
CLC: TP309
Type: Master's thesis
Year: 2011
Downloads: 111
Quote: 1
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Abstract


With the rapid development of internet and the digitization of media resources, the piracy problem of digital products such as images, audio, video and documents are getting more serious, making digital watermarking has become an important research focus, and caused the attention from scholars on the field of information security, computer image processing. Detecting embedded digital media copyright watermark that identifies the media information, can provide a effective copyright protection of digital media. In addition, digital watermarking has its important application values on covert communication, notes security, digital signature, fingerprint recognition, implicit certification. Combined with the characteristics of digital watermarking technology and applications in information security, the following works have been done in this paper:1. It presents a new image scrambling transformation algorithm-Arnold diagonal equal replacement algorithm. It is in the draw on traditional Arnold image scrambling transformation algorithm, through the reset mapping valuesφ, make its diagonal on numerical equal, and then change the image by replacing pixels to achieve the purpose, and ultimately to restore the image through matlab experiments have proved the feasibility and robustness.2. It proposed a dual combination of digital watermark design based on SVD algorithm and DFT algorithm. On the basis of researching of the SVD algorithm and the DFT algorithm one by one, the program creatively putting forward the combination of these two algorithms, the digital watermark embedding and extraction of the effective use of the dual watermark security advantages, the transmission of digital maps for encryption processing to improve the security of image transmission. Then the experiment of the program to prove its feasibility; meanwhile, in order to verify the benefits of the program, the program also conducted a variety of experimental attacks, and with the other dual digital watermarking schemes under the same experimental data environment, and ultimately the program obtained the superiority and robustness, and will be in the military application and promotion. This paper focuses on the design of achievement of information security about armored mechanized units. In the course of the fighting, by using GPS equipped in the armored vehicles, armored mechanized units instantantly capture the images of the geographical environment, and deliver the images through the network (the military network, the public network) promptly to the rear operations command center. In this remote transmission process, in order to ensure the security of image transmission and timeliness, we must use encryption technology to protect the image of the military and validation. Considering the capacity of embedded information from the system to achieve the size and robustness of the good bad, the dual combination of digital watermarking design based on SVD algorithm and DFT algorithm can appropriate to settle this bottleneck (in general, time-domain method has a large quantity of embedded data characteristics, while the Discrete Fourier Transform frequency domain method also has its advantages on anti-interference). Therefore, in the military to transfer digital image watermarking algorithm double encrypted, and then upload through the network to reach the designated area. Taking into account the image in the transmission process will inevitably suffer some of the attacks on the network and interference, so there were many attacks on the experimental program, through the comparison and analysis of experimental data, and ultimately proved the superiority of the program, and robustness. The design can be applied not only to the military field, the military image encrypted transmission; but also for other non-military areas of image transmission.Because the content of information security, including more inconvenient one by one in this narrative. Therefore, the content of this paper is positioned on the technology research of the new Arnold scrambling algorithm, and the military based on double digital watermarking images (maps) encryption, it is to study the new Arnold scrambling algorithm, and dual digital watermarking feasibility and robustness, this paper gives the thoughts of design and experimental results, and dual digital watermarking applications and promotion to the military field, with far-reaching military implications.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality
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