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Encrypting method of multichannel quantum image

A quantum image and encryption method technology, applied in the field of multi-channel quantum image encryption, can solve the problems of ignoring image color information, encrypted image attacks, lack of flexibility of algorithms, etc., and achieve the effect of improving security performance

Active Publication Date: 2014-12-17
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

Since the FRQI quantum image is an expression based on the gray value of the image, in the process of encrypting it, the previous encryption methods are generally limited to the position information of the image, ignoring the color information of the image
And this kind of algorithm usually lacks flexibility. Once the algorithm is cracked, all encrypted images will be attacked.

Method used

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  • Encrypting method of multichannel quantum image

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with accompanying drawing: a kind of encryption method of multi-channel quantum image, it is characterized in that: at first given three angle vectors , of which, 2 n is the number of qubits used to represent the position information of the image; the quantum computer is transformed from the initial state through the Hadamard gate and the controlled NOT gate Convert to MCQI expression :

[0025]

[0026] in, represents the first i The RGB channel color information of a pixel is defined as:

[0027]

[0028] in, , ,..., is the 8-dimensional quantum fundamental state, On behalf of i R, G and B color values ​​of pixels, The default value of 0 does not carry any information.

[0029] Prepare two identical 4 4 multi-channel quantum images with (Such as figure 1 shown), for the image Carry out measurement to get the key value of color information and corresponding transfo...

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Abstract

The invention relates to an encrypting method of a multichannel quantum image. The method is characterized by comprising the following steps: firstly giving three angle vectors, converting a quantum computer to a MCQI expression from an initial state through Hadamard door and controlled NOT gate transformation, transforming color information of the image by using a proposed color transform algorithm so as to acquire the encrypted image. Since the measurement on a quantum superposition state has collapsibility and a result is in existence with a certain probability, each measurement result and each performed color transform are updated, thereby greatly improving the safety performance of the image encryption.

Description

technical field [0001] The invention relates to an encryption method of a multi-channel quantum image, which belongs to the technical field of computer image processing. Background technique [0002] Image encryption is an effective way to protect information security and ensure the safe transmission of images in network communication, and it is an important research direction in the field of computer image processing. In recent years, with the development of quantum computing and quantum information, encryption methods for quantum images have also received extensive attention. Regarding the expression of quantum images, there are many proposals, among which the flexible expression of quantum images (FRQI) is more popular. Since the FRQI quantum image is an expression based on the gray value of the image, in the process of encrypting it, the previous encryption methods are generally limited to the position information of the image, ignoring the color information of the imag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 闫飞杨华民韩成师为礼蒋振刚
Owner CHANGCHUN UNIV OF SCI & TECH
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