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Video encryption method capable of carrying secret information

An encryption method and video technology, applied in image communication, special data processing applications, electrical components, etc., can solve the problems of inability to resist various types of contour attacks, encryption methods cannot be combined with information hiding, etc.

Active Publication Date: 2020-02-18
SOUTH CHINA UNIV OF TECH
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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

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  • Video encryption method capable of carrying secret information
  • Video encryption method capable of carrying secret information
  • Video encryption method capable of carrying secret information

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with drawings and embodiments.

[0054] see Figure 1-6 , a video encryption method capable of carrying secret information, including:

[0055] S1, obtain the video file of the YUV original format to be encrypted;

[0056] S2. Perform intra-frame prediction or inter-frame prediction on each macroblock frame by frame to obtain the macroblock type, prediction-related parameters, CBP, quantization index, and residual coefficient in the optimal prediction mode; the prediction-related parameters include: frame Intra prediction mode, reference frame index and motion vector. According to the H.264 / AVC protocol standard, intra-frame prediction / inter-frame prediction, residual calculation, integer DCT transformation and quantization can be performed frame by frame for each macroblock. , to obtain the macroblock type, prediction related parameters, CBP, quantization index and residual coefficient in the optim...

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Abstract

The invention discloses a video encryption method capable of carrying secret information. The method comprises the following steps: S1, acquiring a to-be-encrypted video file in a YUV original format;S2, performing intra-frame prediction or inter-frame prediction on each macro block frame by frame to obtain a macro block type, a prediction related parameter, a CBP, a quantization index and a residual coefficient in an optimal prediction mode; S3, dividing the macro block of each frame into four regions, namely A1, A2, A3 and A4, and linearly arranging the macro blocks of each region accordingto a raster scanning mode; S4, acquiring an encryption password Key1 of a user, and generating a pseudo-random key sequence random1 through a pseudo-random number generator according to the encryption password Key1; the method has the characteristics that various contour attacks can be resisted, a better visual encryption effect is provided, Meanwhile, the method is suitable for videos which arenot compressed and are already compressed by H.264 and the like.

Description

technical field [0001] The invention relates to the technical field of multimedia information security, in particular to a video encryption method capable of carrying secret information. Background technique [0002] With the continuous development of cloud computing and big data, related applications (such as mobile distributed storage) have rapidly integrated into our lives. However, cloud servers are vulnerable to internal unreliable system administrators' attacks, and because of their importance, they may trigger more external attacks, which has become one of the main obstacles to the development of cloud computing. In order to meet the need of untrusted cloud storage providers to provide trusted video data sharing, we need to store private videos in an encrypted form to deal with possible data leakage situations. Therefore, cloud storage administrators are authorized to access the encrypted video instead of the original video, and directly embed some additional informa...

Claims

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Application Information

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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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