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Image encryption method, system, and decryption method, system

An encryption method and image technology, applied in the field of information security, can solve problems such as single encryption means and poor image security, and achieve the effect of increasing complexity

Active Publication Date: 2019-01-15
HENAN NORMAL UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an image encryption method, which is used to solve the problem of poor image security in the prior art when encrypting images due to a single image encryption means

Method used

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  • Image encryption method, system, and decryption method, system
  • Image encryption method, system, and decryption method, system
  • Image encryption method, system, and decryption method, system

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Embodiment Construction

[0078] The object of the present invention is to provide an image encryption method, which is used to solve the problem of poor image security caused by a single image encryption means in the prior art when encrypting images. The present invention also provides an image decryption method, which is used for decrypting the encrypted image obtained according to the above image encryption method. Correspondingly, the present invention also provides an image encryption system and an image decryption system.

[0079] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0080] Encryption method embodiment:

[0081] This embodiment provides an image encryption method, which realizes image encryption through space scrambling, pixel point scrambling and pixel change, so as to improve the safety factor of the image.

[0082] The image encryption method that this embodiment provides, its flow process is as follows figure ...

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Abstract

The invention provides an image encryption method, a system and a decryption method. Decomposing the bit plane of the image to be encrypted, calculating the exclusive OR of each plane after decomposing, and synthesizing the calculation results to obtain the preliminary encrypted image; a 4-dimensional hyperchaotic Chen system dynamic equation is adopted to encrypt the preliminary encrypted image to obtain a final encrypt image. According to the technical proposal provided by the invention, before the image to be encrypted is encrypted by using the four-dimensional hyperchaotic Chen system dynamic equation, the image to be encrypted is exclusive OR calculated based on a bit plane, thereby increasing the complexity of image encryption and solving the problem of poor image security caused bya single image encryption method in the prior art.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to an image encryption method and system, and a decryption method and system. Background technique [0002] As a commonly used information carrier, image plays a very important role in the huge digital network. Images are usually transmitted in digital form on the network. These digital images on the network can be copied, modified, deleted and added quickly, which is not only easy to cause malicious damage, but also easy to be stolen and leak user's confidential information. With the rapid development of the Internet and multimedia, digital image security has aroused people's great attention, and has become a hot spot in the international academic circles. The main function of image encryption is to ensure the security of images. Security means that the image is encrypted to form an encrypted file, and only the party who knows the password can read the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/60G06N7/08
CPCG06F21/602G06N7/08
Inventor 段新涛秦贝贝王艳梅刘行兵岳冬利谢自梅
Owner HENAN NORMAL UNIV
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