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A system and method for reversible information hiding in image encryption domain

A technology for information hiding and secret information, applied in the field of reversible information hiding and image processing, it can solve problems such as difficulty, uncertainty, and difficulty in feature extraction and utilization, and achieve the effect of reducing distortion, reducing distortion and achieving independence.

Active Publication Date: 2021-05-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reasons for the above difficulties: On the one hand, the current information hiding technology greatly depends on the encoding technology of the carrier, the media type it belongs to, or the attributes of the transform domain, and the process of embedding information must re-quantize and modify the characteristics of the carrier data, but Encryption will make the plaintext content present the greatest irregularity and uncertainty, and the original features are difficult to be extracted and utilized
On the other hand, modern encryption algorithms require that minimal changes in the plaintext will also spread to the entire ciphertext space, so that the more encrypted data is modified during the embedding process, the greater the distortion of the decryption result will be. Therefore, it is necessary to ensure that there is no distortion in decryption information embedding under the environment, or it is more difficult to increase the embedding capacity

Method used

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  • A system and method for reversible information hiding in image encryption domain
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  • A system and method for reversible information hiding in image encryption domain

Examples

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Embodiment 1

[0080] like figure 1 As shown, the present invention first proposes an image encryption domain reversible information hiding system based on image segmentation and image spatial correlation, the system includes an encrypted image generation module, an information embedding module, an information extraction and image reconstruction module, wherein:

[0081] The encrypted image generating module is configured to perform the following actions: the image owner divides the original image into non-overlapping black parts, gray parts and white parts. Use the pixels in the gray part to predict the pixels in the black part, generate a prediction error histogram, use the multi-histogram translation method to embed the least significant bit of the white part pixels into the black part, generate an image to be encrypted, and use the encryption key to generate encryption The stream sequence encrypts the image to be encrypted, generates the encrypted image, and sends it to the information e...

Embodiment 2

[0085] like figure 2 As shown, the present invention also proposes a method for reversible information hiding in the image encryption domain based on image segmentation and image spatial correlation, and the specific steps are as follows:

[0086] 1) Encrypted image generation:

[0087] 1.1) Remove the last column and last row of the image, and divide the image into three parts, namely the gray part: the horizontal and vertical coordinates satisfy mod(i+j, 2)=1, and the black part: the horizontal coordinates satisfy mod(i+j, 2)=1, the ordinate satisfies mod(i,2)=0, the white part: the abscissa satisfies mod(i+j,2)=1, the ordinate satisfies mod(i,2)=1;

[0088] 1.2) Predict the pixel value of the pixel x in the black part according to the diamond prediction:

[0089]

[0090] where v 1 , v 2 , v 3 , v 4 Represents the adjacent pixel values ​​​​up, down, left, and right of the pixel value x. Forecast Generate Predicted Values generate forecast error

[0091] 1.3)...

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Abstract

The invention discloses an image encryption domain reversible information hiding method and system based on image segmentation and image space correlation. At the image sending end, the image owner divides the image into three parts through the designed image segmentation algorithm: black part, white part and gray part. Using the combination of prediction error expansion and multi-histogram translation, the gray part is used to predict the black part, and the least significant bit of the white part is embedded into the black part of the image through an adaptive reversible information hiding algorithm, and then generated by an encryption key Encrypted image; the information hider embeds secret information in the image by hiding the secret key. At the image receiving end, the recipient can either extract the secret information first and then restore the original image, or restore the original image first and then extract the secret information, so as to realize the reversibility of the secret information and the original image. The invention has the advantages of good concealment, large embedding capacity and the like.

Description

technical field [0001] The invention relates to an image encryption domain information hiding technology, which belongs to the technical field of reversible information hiding and image processing. Background technique [0002] As an important branch in the field of information security, information hiding technology has developed rapidly since the new century, especially in the fields of digital copyright and secret communication. Reversible data hiding technology has been widely developed due to its ability to achieve reversible recovery of carrier objects and high embedding capacity. [0003] On this basis, in order to further ensure the confidentiality of images, a reversible information hiding algorithm based on image encryption domain is proposed. As an important combination of signal processing technology and information hiding technology in the encrypted domain, reversible information hiding in the ciphertext domain can play a double insurance role in information se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/467H04N1/32
CPCH04N1/32272H04N19/467
Inventor 张毅锋宋畅
Owner SOUTHEAST UNIV
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