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Digital watermark encryption realization method

An implementation method and technology of digital watermarking, applied in image data processing, image data processing, program/content distribution protection, etc., can solve problems such as inability to detect, and achieve the effects of good security, high sensitivity, and large key space.

Inactive Publication Date: 2013-04-03
王少夫
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Digital watermarking technology is to embed some iconic information directly into multimedia content through a certain algorithm, but it does not affect the value and use of the original content, and it cannot be perceived by the human perception system.

Method used

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  • Digital watermark encryption realization method
  • Digital watermark encryption realization method
  • Digital watermark encryption realization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Select a Lena image with different texture features and a size of 512×512 as the simulation object, such as Figure 4 ;

[0026] The Logistic chaotic map is:

[0027] x n+1 =λx n (1-x n ) (5)

[0028] This chaotic map has the following properties:

[0029] ① When the system parameter 3.57<λ<4, the Logstic map is in a chaotic state.

[0030] ②It is sensitive to the initial value. When x(1)=0.98, the chaotic sequence has regularity and ergodicity, and its mapping is as follows image 3 shown;

[0031] Using the above algorithm, watermark encryption is performed on the gray Lena image, and the watermark encrypted image is as follows Figure 5 As shown; you can clearly see the visual effect of the image after adding the chaotic sequence watermark

[0032] The digital watermark encryption algorithm completes the encryption of a gray image. It has the advantages of large key space, high sensitivity, good security, and strong anti-attack capability.

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Abstract

The invention provides a digital watermark encryption realization method. On the basis of the research of a digital watermark embedding algorithm in a wavelet domain, the chaos theory is introduced into the establishment of the digital watermark; the algorithm that a chaos sequence which is generated by Logistic mapping is embedded into a wavelet domain digital watermark is proposed and realized; and the algorithm has the characteristics of secret key uniqueness, irreversibility, invisibility and robustness according to the specific unpredictability of the chaos sequence. An experiment proves that the algorithm has a good visual effect and is a practical and feasible digital watermark encryption algorithm.

Description

technical field [0001] The invention relates to a digital watermark encryption method of a chaotic system. It belongs to the cryptographic technology in the field of information security. technical background [0002] With the rapid development of the Internet, network security issues have become increasingly severe, and information security issues have become the focus of attention. Cryptography technology is the most important means of data protection in information security technology. Digital watermark technology is one of the most important contents in information camouflage technology. As a supplement to encryption technology, it has gained rapid development in copyright protection and integrity authentication of multimedia information development of. Digital watermarking technology is to embed some iconic information directly into multimedia content through a certain algorithm, but it does not affect the value and use of the original content, and it cannot be percei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/16G06T1/00
Inventor 王少夫
Owner 王少夫
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