Video source tracing and encryption method based on watermark technology

Abstract

The invention relates to a video source tracing and encryption method based on a watermark technology. The method comprises the steps of extracting an original video and obtaining device information and user information; transforming the original video from a time domain to a frequency domain through adoption of a discrete cosine transform algorithm, and generating a to-be-embedded watermark through adoption of a watermark generation algorithm; embedding the to-be-embedded watermark through adoption of a watermark embedding algorithm, thereby generating the video containing the watermark; generating a time domain video containing the watermark through adoption of an inverse transform algorithm; carrying out encryption through adoption of a key frame extraction algorithm and a video head information encryption algorithm, thereby forming an encrypted video file; and coding and storing the encrypted video file. According to the method, the generated video containing the watermark is good in quality, high in concealment and security and good in video sensuality; the method is good in encryption effect and high in security; relatively good source tracing and encryption effects are achieved; the video sharing security and circulation traceability are realized.

Description

technical field [0001] The invention relates to the field of video source tracing, in particular to a method for video source tracing and encryption based on watermark technology. Background technique [0002] In recent years, the scale of modern video surveillance systems such as safe cities and smart cities has become larger and larger. At the same time, the amount of surveillance video data is also increasing. Video surveillance applications have been fully rolled out from key areas such as public security and transportation to government agencies, judicial prisons, smart parks, smart buildings, finance, and telecommunications. As a result, video interactions under control have become more and more frequent, leading to great hidden dangers in video transfer monitoring (traceability). Video leaks and security data leaks caused by hidden dangers are commonplace. Surveillance video security issues have become a serious issue affecting residents. Major issues of everyday lif...

AI Technical Summary

Problems solved by technology

The current mainstream video watermark embedding is mainly operated on the time domain video, most of which are explicit watermark embedding, which has the disadvantages of damaging the quality of the front-end video, poor concealment and security, and poor video perception; and the encryption algorithm for video is relatively Single, security is difficult to guarantee

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