A video encryption method capable of carrying secret information

An encryption method and video technology, applied in the direction of image communication, selective content distribution, electrical components, etc., can solve the problems that the encryption method cannot be combined with information hiding, and cannot resist various types of contour attacks, etc., to achieve good visual encryption effect and practical High value, the effect of resisting contour attacks

Active Publication Date: 2021-07-20
SOUTH CHINA UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the existing H.264 / AVC video ciphertext domain information hiding ubiquitously unable to resist various types of contour attacks, and existing encryption methods that can resist contour attacks cannot combine information hiding, providing A video encryption method capable of carrying secret information

Method used

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  • A video encryption method capable of carrying secret information
  • A video encryption method capable of carrying secret information
  • A video encryption method capable of carrying secret information

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Embodiment Construction

[0053] The present invention will be further described below with reference to the accompanying drawings and examples.

[0054] See Figure 1-6 , A video encryption method that can be equipped with a secret information, including:

[0055] S1, get video files for YUV original format to be encrypted;

[0056] S2, frame-by-frame prediction or inter-frame prediction of each macroblock, to obtain macroblock types, predictive correlation parameters, CBP, quantization step, and residual factor of optimal prediction mode; the prediction related parameters include: Inframe prediction mode, reference frame index and motion vector. Inframe prediction / inter-frame prediction, calculation residual, integer DCT transformation, and quantization, according to the H.264 / AVC protocol standard, can frame prediction or inter-frame prediction of each macroblock frame by frame , Obtain macroblock types, predictive related parameters, CBP, quantitative step, and non-zero coefficients;

[0057] S3, di...

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Abstract

The invention discloses a video encryption method capable of carrying secret information, comprising: S1, obtaining a video file in the original YUV format to be encrypted; S2, performing intra-frame prediction or inter-frame prediction on each macroblock frame by frame, to obtain the best The macroblock type, prediction related parameters, CBP, quantization index and residual coefficient in the optimal prediction mode; S3, the macroblock of each frame is divided into four areas, namely A1, A2, A3, A4, and each The macroblocks in the area are linearly arranged in the manner of raster scanning; S4, obtain the encrypted password Key1 of the user, and generate a pseudo-random key sequence random1 through the pseudo-random number generator according to the encrypted password Key1; the present invention has the functions of resisting various contour attacks, It provides better visual encryption effect, and is suitable for both uncompressed and H.264 compressed videos.

Description

Technical field [0001] The present invention relates to the field of multimedia information security, and more particularly to a video encryption method that can be equipped with a secret information. Background technique [0002] With the continuous development of cloud computing and large data, related applications (such as mobile distributed storage) have quickly integrated into our lives. However, cloud servers are easily attacked by an internal unreliable system administrator, and because of its importance, more attacks may be triggered outside, which has become one of the main obstacles to cloud computing development. In order to meet the needs of untrusted cloud storage providers, we need to store private video in encryption to deal with possible data leakage. Therefore, the cloud storage administrator is authorized to access the encrypted video instead of the original video, and directly embed some additional information directly in the encrypted video to extend additiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/835G06F16/27H04L29/08
CPCG06F16/27H04L67/12H04N21/835
Inventor 何军辉梁剑
Owner SOUTH CHINA UNIV OF TECH
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