High-order airspace hiding method for resisting differential detection

A high-level, differential technology, applied in image data processing, instruments, image data processing, etc., can solve the problems of inability to resist differential detection and analysis, incompatible with natural image characteristics, etc., to achieve detection against differential attacks, large hidden capacity, strong The effect of robustness

Inactive Publication Date: 2009-10-21
哈尔滨佳云科技有限公司
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  • Abstract
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Problems solved by technology

However, after being hidden by the HSBH algorithm, the pixel values ​​​​with hidden information in the image are concentrated in the middle value of the

Method used

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  • High-order airspace hiding method for resisting differential detection
  • High-order airspace hiding method for resisting differential detection
  • High-order airspace hiding method for resisting differential detection

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Embodiment 1

[0024] figure 1 It is a flow chart of the high-position airspace concealment method for anti-differential detection;

[0025] The high spatial domain concealment method of anti-differential detection of the present invention comprises the following steps:

[0026] (1). Select the carrier grayscale image F={f(i, j)1≤i≤N 1 , 1≤j≤N 2}, where (i, j) represents the pixel coordinates of the image, and f(x, y) represents the pixel value of the corresponding position; find out the pixel points that can be hidden. The points that can be hidden are the gray values ​​of the pixels in the following 15 intervals, [11, 20], [27, 36], [43, 52], [59, 68], [75, 84], [91 , 100], [107, 116], [123, 132], [139, 148], [155, 164], [171, 180], [187, 196], [203, 212], [219, 228 ], [235, 244]. Only the points on these intervals can be controlled within 5 pixels through the compensation algorithm after hiding, which cannot be observed visually;

[0027] (2). The secret information image W={w(i,j)1...

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Abstract

The invention relates to a high-order airspace hiding method for resisting differential detection. As a necessary supplement of cryptology and a hot research topic in the information security field in recent years, the information hiding technology draws the attention of more and more people. The technology is to hide secret information in other carriers to go beyond the awareness of people so as to avoid the attack of attackers and ensure the security of secret information. The high-order airspace hiding method for resistable differential detection comprises the following steps: finding a pixel point capable of performing high-order hiding in a carrier gray level image with a size of N1xN2, converting the to-be-hidden secret image with a size of M1xM2 into binary information stream, determining on which position of the carrier image the binary information stream is hidden through Logistic chaos mapping, the Logistic chaos mapping formula being Z(n+1)=4Zn(1-Zn), wherein Zn belonging to (0,1); if the secret information is identical to the bit information, substitution is not performed, and otherwise, substitution is performed, then repeating the process till all information is hidden; in order to resist differential detection, interval size exchange is performed between the pixel points where information is hidden, i.e. +/-5 operation is performed. The invention is used for information hiding technology.

Description

Technical field: [0001] The invention relates to a method for concealing high-position space, in particular to a method for concealing high-position space which is resistant to differential detection. Background technique: [0002] Information hiding technology, as a necessary supplement of cryptography technology, has been paid more and more attention by people, and it is a hot research direction in the field of information security in recent years. Evade attacks from attackers and keep secret information safe. In the image hiding algorithm, according to the classification of embedded domain, it can be divided into spatial domain and transform domain hiding. Because the amount of information that can be hidden in the transform domain is small, it is usually applied to digital watermarking, while the hiding capacity of the space domain is relatively large. In the image information hiding technology based on the space domain, the least significant bit (LSB) algorithm has a ...

Claims

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Application Information

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IPC IPC(8): G06T1/00
Inventor 于晓洋张健陈宇任洪娥
Owner 哈尔滨佳云科技有限公司
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