Image encryption method and device

An encryption method and technology of an encryption device, which are applied in the field of information processing, can solve problems such as low encryption efficiency, and achieve the effects of improving encryption efficiency and reducing storage space.

Active Publication Date: 2019-09-13
南京研捷网络科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Existing image encryption methods are mainly for grayscale images, although encryption methods based on color images have been proposed, but only solve the encryption of a single color image
When multiple images need to be encrypted, the single image encryption method needs to be repeated multiple times to complete, and the encryption efficiency is low

Method used

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  • Image encryption method and device

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Embodiment Construction

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only It is a part of the embodiments of this application, not all of them. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without...

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Abstract

The invention provides an image encryption method and device, and the method comprises the steps: obtaining a to-be-encrypted image group, and generating a first real number matrix of the to-be-encrypted image group; adjusting the first real number matrix to obtain a second real number matrix; performing Fourier transform on the second real number matrix to obtain a complex number matrix of the second real number matrix and a coefficient of the complex number matrix; and determining a ciphertext and a decryption key of the to-be-encrypted image group based on a preset number of coefficients ofthe complex matrix. According to the embodiment of the invention, the Fourier coefficients of the to-be-encrypted image group are generated, and part of the Fourier coefficients are selected as the ciphertext and the secret key, so that the ciphertext storage space is reduced, multiple images are encrypted at the same time, and the encryption efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of information processing, in particular to an image encryption method and device. Background technique [0002] With the rapid development of computers and the Internet, a large number of images are shared through the Internet. The secret information contained in the image faces intentional or unintentional leakage. Image encryption has become an important technology to effectively hide image information. [0003] The existing image encryption methods are mainly for grayscale images. Although the encryption method based on color images has been proposed, it only solves the encryption of a single color image. When multiple images need to be encrypted, the method of encrypting a single image needs to be repeated many times to complete, and the encryption efficiency is low. Contents of the invention [0004] In view of this, the purpose of the present application is to provide an image encryptio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/60H04N1/32
CPCG06F21/602H04N1/32272
Inventor 邵珠宏尚媛园赵晓旭丁辉刘铁王丰王云飞
Owner 南京研捷网络科技有限公司
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