H.264 Video Encryption Method Based on Region of Interest

Abstract

The invention provides an H.264 video encryption method based on a region of interest. According to the method, an encryption processing scheme based on a three-level secret key is adopted, after a video encoding parameter of the region of interest in an H.264 video is changed by means of the three-level secret key, and then encoding processing is carried out by the direct adoption of an H.264 video encoding criterion, so that the effect of partial encryption of the region of interest is achieved, the situation that a pixel value in the region of interest is directly processed for encryption is avoided, data computation amount and operation complexity are reduced, encryption processing operation speed is beneficially increased, the increasing amount of the code rate after encryption is reduced, encrypted video data can be compatible with an H.264 standard encoder in a data format and can be directly applied to real-time playing of the H.264 video, besides, the method can eliminate encryption diffusion influences of encryption of the region of interest on a region of non-interest by combining and using a motion estimation drifting elimination technology, and the reading effect of the encrypted videos is improved.

Description

technical field [0001] The invention belongs to the technical field of information encryption in multimedia information security, and in particular relates to an H.264 video encryption method based on a region of interest, through which the region of interest in the H.264 video can be encrypted locally in real time, and Applied to real-time playback of H.264 video. Background technique [0002] Because of its intuition, universality and high information capacity, video occupies a very large proportion in people's life entertainment and information exchange. However, there are problems such as malicious tampering and eavesdropping in video transmission on the network, and multimedia security issues are becoming increasingly prominent. [0003] Video encryption technology is an important technology in the field of video data protection. Video encryption technology is to change the encoded video data stream or the data in the intermediate encoding process, so that the video d...

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Problems solved by technology

[0007] For the above-mentioned problems existing in the prior art, the object of the present invention is to propose a kind of H.264 video encryption method based on region of interest, can carry out real-time local encryption process to the region of interest in H.264 video by this method, It is used to solve the problem of the amount of encrypted data calculation processing and the increase in the code rate after encryption, and can be directly applied to the real-time playback of H.264 video

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