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Information hiding method based on SVD

A technology of information hiding and information volume, applied in the field of information hiding based on SVD decomposition, which can solve the problems of undermining the security of information transmission and data information being vulnerable to attack or theft

Active Publication Date: 2017-05-31
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Internet is interconnected, open, and connected in a variety of forms, making the data transmitted through the Internet vulnerable to attack or theft, destroying the security of information transmission

Method used

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  • Information hiding method based on SVD
  • Information hiding method based on SVD
  • Information hiding method based on SVD

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Experimental program
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Embodiment Construction

[0092] The present invention will be further explained below in conjunction with the drawings.

[0093] For the convenience of description, the main variables in the simple definition algorithm are: hidden information A, carrier image I, and encrypted image I'generated after embedding, where height is the height of the image, and width is the width of the image. I.width represents the width of the I image, and I.height represents the height of the I image. The same is true for C images. A.length represents the size of hidden information A.

[0094] An information hiding method based on SVD proposed by the present invention includes a preprocessing step, an encryption step, and a decryption step. The specific steps are as follows:

[0095] The preprocessing steps are:

[0096] Step 1) Load the carrier image I, and estimate how much hidden information the carrier image B can hold:

[0097] Step 1.1) by the formula Calculate the maximum amount of information C1 of the hidden informatio...

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Abstract

The invention provides an information hiding method based on SVD, and the method comprises the steps: preprocessing, encrypting, and decrypting. The method specifically comprises the following steps: firstly carrying out the preprocessing of original secret information, carrying out the linear transformation of a secret information matrix, and obtaining compressed data, thereby achieving a purpose of reducing the embedding amount of the secret information; secondly achieving the further encryption of the data through an Arnold scrambling algorithm; finally enabling a JPEG image as a carrier, and enabling the encrypted information to be embedded into the carrier image. According to the invention, the DCT of the carrier image is carried out firstly, and a DCT coefficient matrix is obtained. Moreover, the SVD of the DCT coefficient matrix is carried out, and an optimal embedding position of the information is obtained, and then a ciphertext is embedded into the DCT matrix through an F5 steganographic algorithm. The method improves the information hiding amount through a compression factor, improves the hiding performance of an information hiding algorithm through employing the SVD technology, and achieves the safer data hiding.

Description

Technical field [0001] The invention belongs to the technical field of image processing, and specifically relates to an information hiding method based on SVD decomposition. Mainly aiming at the hiding and embedding of images and the preprocessing of secret information, an improved image change algorithm is used to implement image-based information hiding technology, thereby improving the concealment of secret information to achieve the purpose of safe transmission of information. Background technique [0002] With the rapid development of digital communication technology on a global scale, digital information has become an important method of information transmission. With the help of computer networks, communication between people becomes convenient and fast. In the general environment of computer networks, digital information is transmitted in various networks in the world, and immediately, the risks brought by this convenience also arise. The Internet is interconnected, ope...

Claims

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Application Information

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IPC IPC(8): H04N19/467H04N19/48H04N19/60H04N19/625H04N19/90
CPCH04N19/467H04N19/48H04N19/60H04N19/625H04N19/90
Inventor 张迎周赵莲陈星昊王星尹秀
Owner NANJING UNIV OF POSTS & TELECOMM
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