Information Hiding Based On Digital Images: Research On Security And Arithmetics

Information-hiding is a new technology in the field of information security. The security of information-hiding and the arithmetic of information-hiding are the primary factor controling the application of information-hiding, is a problem have to resolve immediately which in this field. With the consummating of the Security of information-hiding ceaselessly, the arithmetic of information-hiding can be improved ceaselessly, and the development and application of information-hiding can be impelled.Under the guidance of the research on the security of information-hiding, on the purpose of increase the security of information-hiding and along the foreland of the research on information-hiding, this thesis has accomplished following fruits independently:(1)The content of research on the security of information-hiding based on digital images was analyzed; an information-hiding model based on digital images was proposed and analyzed; speculated with the affections of the attacks to the security of information-hiding based on digital images, constituted the system of the guide lines in the appraiseing of the security of information-hiding based on digital images, described the relationships between the guide lines and the factors of the model with the Information-Theory.(2) Analyze the security model of information-hiding theory proposed by Christian Cachin. On this basis, propose a novel method to evaluate the nonperception and proved its usability through experiments. Analyze the key used in the information-hiding system in detail, confirm the content in it, and measure the performance to resist the extraction through calculating its complexity.(3) On the basis of researching the traditional algorithm and the analyzing method in space, improve the security of the traditional algorithm LSB, and prove the security of the improved algorithm.(4) On the purpose of increasing the security, propose a novel information hiding method in space, thereinto, independently design a novel chaotic sequence to construct the random function to complete the secret information embedding.At last, prospect the developing foreground of the research in the field of...