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Separable ciphertext domain reversible data hiding method based on bit plane segmentation

A data hiding, bit plane technology, applied in image data processing, image data processing, instruments, etc., can solve the problems of inability to achieve complete reversibility, inseparability, bit error rate, etc., and achieve high security and good robustness. , high-quality effects

Active Publication Date: 2022-06-24
LIAONING NORMAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

[0007] However, the VRAE-based framework has its own limitations. For example, some may have a bit error rate in data extraction or image restoration, and cannot be completely reversible; some are inseparable in the process of information extraction and image restoration.

Method used

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  • Separable ciphertext domain reversible data hiding method based on bit plane segmentation
  • Separable ciphertext domain reversible data hiding method based on bit plane segmentation
  • Separable ciphertext domain reversible data hiding method based on bit plane segmentation

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Embodiment Construction

[0089] A separable ciphertext domain reversible data hiding method based on bit plane segmentation of the present invention is as follows: figure 1 shown, follow the steps below:

[0090] Step 1: Perform block classification scrambling encryption and traversal matrix encryption on the original image

[0091] Step 1.1 will figure 2 (a-f) 6 standard grayscale original images of size 128×128: ​​Lena, Baboon, Boat, Pepper, Barbara, Airplane, respectively divided into p×q non-overlapping sub-blocks of size m×n, the p =M / m, q=N / n;

[0092] Step 1.2 According to formula (1), the sub-blocks are divided into brightness blocks and darkness blocks, and the brightness blocks are marked with 1 and the darkness blocks are marked with 0, and the classification map B is generated;

[0093]

[0094] In formula (1), num represents the number of pixels whose gray value is greater than or equal to 127 in the sub-block, i∈(1,2,3...p), and j∈(1,2,3...q);

[0095] Step 1.3 Perform Huffman co...

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Abstract

The invention discloses a separable ciphertext domain reversible data hiding method based on bit plane segmentation, and the method comprises the steps: firstly providing a block classification scrambling algorithm and a traversal matrix encryption algorithm, and completing the encryption of an original image; secondly, realizing watermark image encryption by utilizing Hilbert curve encryption; in a ciphertext domain, an all-bit-plane scrambling technology is adopted, bit-plane rotation is firstly implemented, then the bit-plane rotation is partitioned and classified into continuous blocks and discontinuous blocks, and finally reversible data hiding is realized according to a pixel prediction method. Meanwhile, the secret keys can be separated, the hidden watermark can be extracted by the hidden secret key, the original image can be recovered by the encrypted secret key, and the watermark image can be extracted and the original image can be recovered by the double secret keys. According to the method, 100% reversibility is realized based on pixel prediction, the watermark image can be extracted without errors, the original image can be recovered 100%, and the method has the advantages of high safety, large capacity, high quality and good robustness.

Description

technical field [0001] The invention relates to a reversible data hiding method in a ciphertext domain, in particular to a reversible data hiding method in a separable ciphertext domain based on bit plane segmentation. Background technique [0002] Information hiding technology stands out among many encryption technologies with its integrity authentication, copyright protection and other functions. Reversible data hiding is an information hiding technology that can restore original images without loss and extract information without errors. However, the traditional reversible data hiding has the security risk of exposing the original image, so the ciphertext domain reversible data hiding that combines encryption technology with reversible data hiding has become a hot spot in the academic circles. [0003] Reversible Data Hiding in Encrypted Image (RDHEI) in the ciphertext domain hides the information while protecting the image content from being leaked. Users can decrypt the...

Claims

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Application Information

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IPC IPC(8): H04N1/44H04N1/32G06T1/00
CPCH04N1/4446H04N1/32272H04N1/32299G06T1/0064G06T2201/0065Y02D30/50
Inventor 石慧胡宝月王锋
Owner LIAONING NORMAL UNIVERSITY
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