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A Quantum Image Encryption Method Based on Hyperchaotic System

A technology of quantum images and encryption methods, applied in the field of information security, can solve problems such as speed and cost constraints, and achieve the effects of enhancing anti-attack and security, resisting brute force attacks, and being easy to distribute

Active Publication Date: 2018-09-25
NANCHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional encryption technology mainly relies on electronic devices such as computers or digital signal processors, and these methods are limited by speed and cost

Method used

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  • A Quantum Image Encryption Method Based on Hyperchaotic System
  • A Quantum Image Encryption Method Based on Hyperchaotic System
  • A Quantum Image Encryption Method Based on Hyperchaotic System

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the embodiments and drawings, but the protection scope of the present invention should not be limited thereby.

[0028] The encryption object of this implementation is the grayscale image stored in the quantum state, assuming that the plaintext quantum image is in g(y,x)∈[0,2 8 -1], the encryption algorithm steps are as follows:

[0029] Step 1: Choose the initial condition x 0 ,y 0 ,z 0 , h 0 , using the Runge-Kutta method with a step size of 0.001 to iterate the Chen hyperchaotic system n 0 = 2 2n times, four hyperchaotic sequences {x i}, {y i},{z i},{h i}(1≤i≤n 0 ).

[0030] Step 2: Put the four hyperchaotic sequences {x i}, {y i},{z i} and {h i} into the corresponding integer sequence {x i *}, {y i *},{z i *} and {h i *}.

[0031]

[0032] Where fix(x) represents the largest integer not greater than x.

[0033] Step 3: In order to perform the quantum XOR operati...

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Abstract

The invention discloses a hyperchaotic system based quantum image encryption method. The method comprises: finishing quantum image encryption by utilizing CNOT operation to realize XOR operation of a quantum image, namely, generating a hyperchaotic sequence by a Chen's hyperchaotic system, controlling unit transformation and NOT gate by a processed hyperchaotic sequence to construct CNOT transformation, and then, utilizing the CNOT operation to realize the XOR operation of the quantum image, thereby finishing the quantum image encryption. According to the method, the XOR operation of the quantum image is constructed for the first time and applied to the quantum image encryption, so that the attack resistance and security of an encryption algorithm can be enhanced; an initial condition of the Chen's hyperchaotic system serves as a secret key of the encryption algorithm, so that the effect of expanding secret key space is achieved; and the algorithm can resist strong attack, so that the secret key is easier to allocate, store and memorize.

Description

technical field [0001] The patent of the present invention belongs to the field of information security technology, in particular to image encryption technology. Background technique [0002] With the rapid development of multimedia technology and network technology, more and more private information is stored in images. Images have become an important information carrier in network communication. Therefore, how to ensure the security of various private and sensitive image information in the image has become one of the hot issues that people pay attention to. [0003] Image encryption originated from the early classical encryption theory, and its purpose is to hide the real information of the image itself, so that the thief cannot obtain the original image after obtaining the ciphertext, and the authorized receiver can use the pre-agreed key and decryption method to encrypt the encrypted image. The text is decrypted. Traditional encryption techniques mainly rely on electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/60G06N7/08
CPCG06F21/602G06N7/08
Inventor 周南润陈伟伟谭如超华天祥何祥涛
Owner NANCHANG UNIV
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