Digital image encryption method of DCT domain based on three dimensional Lorenz chaotic mapping

A digital image and chaotic mapping technology, applied in the field of digital image encryption in the DCT domain, can solve the problem of small key space, achieve the effect of fast running speed, high efficiency, and overcome vulnerability to attacks
CN102722856BInactive Publication Date: 2014-07-23BEIJING UNION UNIVERSITY
1 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING UNION UNIVERSITY
Publication Date
2014-07-23
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a image encryption method of DCT domain based on three dimensional Lorenz chaotic mapping. The characteristics of the method lie in that, the method comprises the following steps: inputting original digital image information, carrying out DCT transformation on the original digital image information; carrying out three dimensional Lorenz scrambling transformation on the DCT coefficient array; carrying out one-time encryption on the DCT coefficient symbol after being subjected to scrambling transformation; and carrying out inverse DCT transformation on the result after being subjected to one-time encryption, wherein the result of the inverse DCT transformation is outputted encryption image information. The method in the invention possesses a good scrambling property and high encryption efficiency. The method can effectively overcome a disadvantage that low-dimension chaotic encryption algorithm and airspace scrambling are prone to attacks, and the method can effectively guarantee confidentiality and security of the encryption image. The method in the invention is not only suitable for encryption of single digital image, but also suitable for carrying out encryption on multiple images in a file package.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of digital image processing, more specifically, to a digital image encryption method based on the DCT domain of the three-dimensional Lorenz chaotic map. Background technique

[0002] With the development of network and multimedia technology, digital images have become one of the important information carriers for people to communicate. However, not all digital image information can be fully disclosed, some digital image information involves the secrets of countries or groups, and some digital image information may involve personal privacy, or some digital image information is a kind of consumer goods, only for supply Authorized users can watch or download. Therefore, the security and confidentiality technology of digital image information has become more and more important. Because digital image information is different from other ordinary data streams, it has the characteristics of large data volume, high correlat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More