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Data encryption and decryption method and device and electronic equipment

A technology for encryption, decryption, and data, which is applied in the field of data processing and can solve problems such as low security of encryption methods

Active Publication Date: 2021-03-09
AGRICULTURAL BANK OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides a data encryption and decryption method, device and electronic equipment to solve the problem of low security of encryption methods in the prior art

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  • Data encryption and decryption method and device and electronic equipment
  • Data encryption and decryption method and device and electronic equipment
  • Data encryption and decryption method and device and electronic equipment

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Embodiment Construction

[0075] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0076] In cloud and Internet communications, digital images in JPEG format have the advantages of small file size and fast upload and download speed, and are widely used in practical applications. Further, when transmitting a digital image in JPEG format, in order to improve the security of digital image transmission in JPEG format, it is necessary to encrypt the digital image in JPEG format before performing a transmission operation.

[0077] In the prior art...

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Abstract

The invention provides a data encryption and decryption method and device and electronic equipment, and the method comprises the steps: carrying out the encoding of a plurality of entropies in a statistical feature value of an AC coefficient of at least one image block in bit stream data according to a statistical feature adjustment parameter and a preset statistical feature adjustment rule when an image is encrypted; adding the statistical characteristic value of the AC coefficient of at least one image block in the bit stream data into the statistical characteristic value of the AC coefficient of at least one other image block in the bit stream data, so that the statistical characteristic value of the AC coefficient of at least one image block is no longer the original statistical characteristic value, even if the adjusted statistical characteristic value is attacked, the obtained image is not the original image, thereby reducing the risk of image leakage, and enhancing security.

Description

technical field [0001] The present invention relates to the field of data processing, more specifically, to a data encryption and decryption method, device and electronic equipment. Background technique [0002] In cloud and Internet communications, digital images in JPEG format have the advantages of small file size and fast upload and download speed, and are widely used in practical applications. Further, when transmitting a digital image in JPEG format, in order to improve the security of digital image transmission in JPEG format, it is necessary to encrypt the digital image in JPEG format before performing a transmission operation. [0003] In the prior art, when encrypting a digital image in JPEG format, the AC coefficient in the bit stream corresponding to the digital image is used for encryption operation, but the data obtained by this encryption operation is vulnerable to plaintext attacks, resulting in encrypted Leakage of digital images, less security. Contents ...

Claims

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Application Information

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IPC IPC(8): H04N1/44H04N19/13
CPCH04N1/4413H04N19/13
Inventor 郑梦阳
Owner AGRICULTURAL BANK OF CHINA
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