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Research on Extracting Attack to Hidden Message in Image

Author: LiuJing
Tutor: TangGuangMing
School: PLA Information Engineering University
Course: Military Equipment
Keywords: Steganographic techniques Steganography attack Extract attack Stego-key Extraction of difficulty Replacement steganography Image is divided
CLC: TP309.7
Type: Master's thesis
Year: 2010
Downloads: 38
Quote: 0
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Abstract


Steganography technology the hidden communication technology, the technology may be used in military communications and sabotage. Steganography attack is able to detect, extract and destroy the hidden information technology is an important means to prevent the abuse of steganography technology. The hidden information extraction attack steganography attack purposeful content, its research to gain vital intelligence, security is of great significance in the fight for the military initiative, the maintenance of military information. In this paper, from the theory and methods to explore the hidden image information extraction attack. Complete the following aspects of work: 1. Steganography attack model is established according to the purpose of steganography attacks, extracted ideas and types of attacks and pointed out that the problem of extraction attack study. 2. Hidden information extraction difficulty. Random oracle the model formalization extracted attacker model, secret information is difficult to extract the model find extracted attacks breakthrough point; to attack specific extraction process, the hidden information extracted difficulty; through the analysis of the extracted difficulty, asked the guide the extraction method of attack the general principles of the design. 3. For image random replacement steganography extract attack. Extract design principles based on the extraction method of attack, attack seen as a special class of steganography detection. First, the image pixels divided by analyzing the replacement the steganography and secretive image the minimum bit flip frequency of various types of point of impact, find strong statistical differences distinguish the authenticity of steganography key design random replacement steganography extraction method of attack. The experiments show that this method can effectively extract the random replacement of certain embedding rate range image steganography. 4. The image sequence LsB steganographic extraction method of attack. Design principles guiding extract attack methods to analyze and prove the stability and is not embedded in the information part of the incremental find strong statistical differences distinguish the authenticity of the key position, by estimating the smooth part of the embedded information part of the sequence LsB stegoimage reduced the effective key space designed based on strong statistical differences the sequence LsB steganography extraction method of attack, better extraction attack. Conclude this article, and hidden information extraction attack development prospects, pointed out the future direction of research and ideas.

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