A Steganalysis Method Based on Parameter Identification and Estimation

A technology of steganalysis and parameter identification, applied in the sub-field of information hiding, which can solve the problem of not considering the classifier training set

Active Publication Date: 2016-04-27
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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Problems solved by technology

Although this patent method provides a better framework for using existing steganalysis methods, it does not consider the use of parameter identification and estimation methods to improve the composition of the classifier training set. Therefore, this patent application and this patent The basic purpose, idea and specific implementation methods of the application are obviously different

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  • A Steganalysis Method Based on Parameter Identification and Estimation
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  • A Steganalysis Method Based on Parameter Identification and Estimation

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[0047] 1) Determine the attribute parameter set

[0048] Select the factors that have obvious influence on steganalysis (such as image texture, size, quality factor, etc.) as the one-dimensional attribute parameter vector, that is, determine the parameter vector (α 1 ,α 2 ,…α n ). where the parameter α for each dimension 1 ,α 2 ,…α n , it is agreed that its values ​​are η1 , η 2 ,…η n kind. For example, the image size can be selected from three types: large (3000×2000), medium (1500×1000), and small (512×512), the quality factor can be selected from 80 and 90, and the texture can be selected from high, medium and low texture. In practical applications, the more types of values ​​in each dimension, the more complete the knowledge base will be constructed. In the use of the present invention, the similarity of attribute parameter vectors will be higher, and the finally obtained classifier configuration parameters will be more reasonable .

[0049] 2) Preparation of con...

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Abstract

The invention discloses a steganalysis method based on parameter identification and estimation. The steganalysis method comprises the following steps of: (1) establishing a steganography configuration scheme knowledge base, wherein each configuration scheme comprises a configuration parameter Fi of a steganalysis classifier, and an attribute parameter vector Ti of a training sample used for acquiring the configuration parameter Fi; (2) as for a to-be-detected object, firstly identifying an attribute parameter vector P of the to-be-detected object; (3) carrying out similarity calculation on the attribute parameter vector P of the to-be-detected object and the attribute parameter vector Ti of each configuration scheme in the steganography configuration scheme knowledge base, so as to obtain a similarity measure index; and (4) selecting parameter configuration of the steganalysis classifier corresponding to the configuration scheme with the maximum similarity measure index as relevant parameters in the steganalysis classifier, carrying out steganalysis on the to-be-detected object, and judging whether the to-be-detected object is a steganography text sample containing steganography information or not. Compared with the prior art, the steganalysis method based on the parameter identification and estimation has the advantage that the accuracy rate of the steganalysis is greatly improved.

Description

technical field [0001] The present invention relates to a steganalysis method, in particular to a steganalysis method based on parameter identification and estimation, which belongs to the information hiding sub-field in the field of information security technology. Background technique [0002] With the development of computer and network technology, the use of digital multimedia is becoming more and more common, and the modern steganography technology based on digital multimedia has gained more and more attention. Steganography can embed confidential information in the carrier data without affecting the perceived content and quality of the carrier data, and improve the security of confidential data transmission or storage by concealing the existence of confidential communication or confidential storage. According to reports, steganography has been exploited by criminals and malicious code. Corresponding to steganography, steganalysis is a technology used to analyze and ju...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/66G06T1/00
Inventor 赵险峰张纪宇安宁钰夏冰冰周楠
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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