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Encrypted image reversible information hiding method

A technology for information hiding and encrypting images, applied in the field of reversible information hiding of encrypted images, to achieve the effect of significant gain effect and high information hiding capacity

Active Publication Date: 2020-03-24
四川中油优途电子商务有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, the RDH-EI method uses image redundancy to compress the available space for the embedding of secret information, which involves various encoding methods for the difference between pixels, but most of them do not fully utilize the distribution characteristics of these differences

Method used

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  • Encrypted image reversible information hiding method
  • Encrypted image reversible information hiding method

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Embodiment Construction

[0038] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0039] Such as figure 1 As shown, the encrypted image reversible information hiding method includes the following steps:

[0040] S1. Perform block scrambling on the original image to obtain disordered image blocks;

[0041] S2. Encrypting the out-of-sequence image blocks to obtain an encrypted image;

[0042] S3. Select reference pixels, special pixels and remaining pixels from the encrypted image, classify and encode th...

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Abstract

The invention discloses an encrypted image reversible information hiding method, which comprises the following steps of S1, performing block scrambling on an original image to obtain out-of-order image blocks; S2, encrypting the out-of-order image blocks to obtain an encrypted image; and S3, selecting a reference pixel, a special pixel and residual pixels from the encrypted image, and classifyingand encoding the pixels to obtain an encoded image, thereby completing reversible information hiding of the encrypted image. According to the method, the image redundancy characteristic can be fully utilized by the adaptive coding method, compared with an existing related coding method, higher information hiding capacity can be achieved, and especially for a smooth image, the gain effect of the embedding rate is particularly remarkable.

Description

technical field [0001] The invention relates to the field of data encryption, in particular to a method for reversible information hiding of encrypted images. Background technique [0002] Reversible data hiding in encrypted image (RDH-EI) is a secure method to protect the carrier image from being leaked and transmit secret information. RDH-EI, as an important combination point of encryption domain signal processing technology and information hiding technology, can play a double insurance role for information security in the process of data processing, especially with the promotion of cloud services, RDH-EI is to realize One of the research focuses of privacy protection. In recent years, the RDH-EI method uses image redundancy to compress the available space for embedding secret information, which involves various coding methods for the difference between pixels, but most of them do not fully utilize the distribution characteristics of these differences. Therefore, how to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/32
CPCH04N1/32272H04N1/32288
Inventor 陈帆欧珂帆和红杰
Owner 四川中油优途电子商务有限责任公司
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