Encrypted domain lossless reversible information concealing method based on carrier image check code

A carrier image and information hiding technology, which is applied in image enhancement, image data processing, image data processing, etc., can solve the problems of image recovery error, small amount of secret data, limited space, etc.

Inactive Publication Date: 2013-08-28
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above-mentioned first method, since the extraction of information and the recovery of the carrier need to be based on the change of the spatial smoothness before and after the image flip, but after the flip operation, the smoothness of the image is sometimes smaller than the smoothness

Method used

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  • Encrypted domain lossless reversible information concealing method based on carrier image check code
  • Encrypted domain lossless reversible information concealing method based on carrier image check code
  • Encrypted domain lossless reversible information concealing method based on carrier image check code

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Embodiment Construction

[0024] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] see figure 1 , the encryption domain lossless reversible information hiding method based on the carrier image verification code of the present invention, the method comprises the following steps:

[0026] (1), the original carrier image is divided into the first carrier sub-image and the second carrier sub-image, the first carrier sub-image is encoded, and the check code corresponding to the first carrier sub-image is obtained after encoding, and the check code is Embedding into the second carrier sub-image, encrypting the first carrier sub-image and the second carrier sub-image containing the verification code, and obtaining the encrypted ciphertext carrier image containing the verification code, the specific steps are as follows:

[0027] (1-1), the original carrier image into the first carrier subimage and the second carrier subimage ...

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Abstract

The invention discloses an encrypted domain lossless reversible information concealing method based on a carrier image check code. The method comprises the steps of (1) dividing an original carrier image into a first carrier sub-image and a second carrier sub-image, encoding the first carrier sub-image, embedding a check code corresponding to the first carrier sub-image into the second carrier sub-image, encrypting the carrier image containing the check code, and obtaining a encrypted ciphertext carrier image containing the check code; (2) dividing the encrypted ciphertext carrier image containing the check code, carrying out different overturn computing on negative three bits of an first encrypted carrier sub-image according to secret data to be embedded, embedding the secret data, and obtaining a ciphertext carrier image containing the secrete data; (3) decoding a plaintext domain carrier image containing the secret data, abstracting the secret data in the decrypted plaintext domain carrier image, and recovering an original carrier image. According to the method, the secrete data are embedded in the ciphertext carrier image, and the method ensures that the original carrier image is recovered in a lossless mode while the secret data are subjected to plaintext abstraction.

Description

technical field [0001] The present invention relates to a method of adjusting pixel values ​​using signal processing and computer technology for lossless information hiding in the encrypted domain. Background technique [0002] Information hiding technology is to embed secret data into multimedia carrier data in a way that does not attract the attention of the outside world. Through public channels, in the process of transmitting multimedia carrier data, the purpose of transmitting secret data is achieved, and finally concealed communication is realized. In special occasions, for example, in sensitive fields such as medicine and military affairs, the carrier is not allowed to be changed in any way, that is, after the secret data is extracted from the carrier, the carrier itself must be able to recover without damage, and a reversible mechanism is required to ensure the recovery of the carrier. In practical applications, if the original multimedia carrier data needs to be pro...

Claims

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Application Information

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IPC IPC(8): G06T1/00G06T5/00
Inventor 余江张新鹏栗风永王朔中程航
Owner SHANGHAI UNIV
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