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Steganalysis method, terminal equipment and storage medium based on sequential hypothesis testing

A technology of steganalysis and hypothesis testing, which is applied in the field of steganalysis, can solve the problems that are not conducive to batch steganalysis, the sampling method is not flexible enough, and there is no mathematical theory support, so as to improve resource utilization, improve feature recognition ability, The effect of shortening the analysis time

Active Publication Date: 2020-08-25
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not have a complete mathematical theory support, the sampling method is not flexible enough, multiple sampling is required, and the sampling results are selected according to the best, which wastes computing resources and is not conducive to batch and online steganalysis.

Method used

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  • Steganalysis method, terminal equipment and storage medium based on sequential hypothesis testing
  • Steganalysis method, terminal equipment and storage medium based on sequential hypothesis testing
  • Steganalysis method, terminal equipment and storage medium based on sequential hypothesis testing

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Embodiment 1

[0046] refer to figure 1 As shown, Embodiment 1 of the present invention provides a steganalysis method based on sequential hypothesis testing, including the following steps:

[0047] S1: Construct a steganalysis sample library, wherein the steganalysis sample library includes an original text set and a corresponding steganographic text set, wherein the steganographic text set is generated by at least two different steganographic methods.

[0048] The generation of the steganographic method may be an existing steganographic method, such as embedding a pseudo-random byte array, or a steganographic method proposed later, which is not limited here.

[0049] The steganalysis sample library is divided into a training set and a verification set, the training set is used for model parameter training and weight calculation, and the verification set is used for fitting estimation of the probability distribution model.

[0050] Step S1 in this embodiment comprises the following steps: ...

Embodiment 2

[0097] The present invention also provides a steganalysis terminal device based on sequential hypothesis testing, including a memory, a processor, and a computer program stored in the memory and operable on the processor, and the processor executes the The computer program implements the steps in the above method embodiment of Embodiment 1 of the present invention.

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Abstract

The present invention relates to a steganalysis method based on sequential hypothesis testing, a terminal device and a storage medium. The method includes: constructing a steganalysis sample library; constructing and training multiple prediction models to obtain a final prediction model, According to the attributes corresponding to the samples, evaluate the prediction degree of each model; set the weight corresponding to each final prediction model corresponding to different attribute samples; use the result set output by the model to estimate the parameters of multiple different types of probability distribution models and Fitting to obtain the negative probability distribution model and positive probability distribution model with the highest fitting degree; convert the samples to be predicted into sequential samples, update the sequential probability ratio according to the prediction results of each block according to the final prediction model, and combine The weight calculates the final sequential probability ratio, and then determines whether it is a steganographic sample. The invention is used to reduce the number of samples and improve efficiency under the premise of ensuring robustness and accuracy, so as to meet the requirements of real-time online steganalysis.

Description

technical field [0001] The invention relates to the field of steganalysis, in particular to a steganalysis method based on sequential hypothesis testing, a terminal device and a storage medium. Background technique [0002] Steganography is an information hiding technique. It achieves the purpose of hiding information by embedding information in the data redundancy of the carrier. With the development of modern computer science and technology, the expression precision of multimedia data far exceeds the range that human senses can perceive. People can use the redundancy of multimedia data to embed some hidden data, and use the objective fact that human senses are difficult to detect and embedded behavior cannot be found to realize hidden information. Steganography can be used for secret communication and can effectively protect the confidential information of individuals, enterprises and governments. The carrier used to embed information is called the original text, and th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00G06K9/62G06F17/18
CPCG06T1/0021G06F17/18G06F18/214
Inventor 黄炜梁思博刘仁帅
Owner XIAMEN UNIV