Research On H.265 Video Encryption Algorithm Based On Content-association Key

With the development of the mobile Internet,more and more information is stored in mobile devices in electronic form.How to effectively ensure the security of this information is an issue worthy of attention from all parties.It is generally believed that encrypting files can effectively guarantee the security of information.Among all kinds of files,the structure of video files is the most complex and the information contained is the most abundant.Therefore,the research on video file encryption technology has a relatively important position.Video files have their own characteristics,and most traditional encryption algorithms do not distinguish between video files and other files based on their characteristics during the encryption process,this leads to the limitations of traditional encryption algorithms for encrypting video files.Even in some cases,the security of video information cannot be well protected.Compared with other video coding standards,H.265 coding has the advantages of low transmission rate,good compression effect,and high image quality.More and more manufacturers choose H.265 coding as the video compression coding standard.H.265 coding shows good application prospects.In order to further ensure the security of video information,this paper designs a H.265 video encryption algorithm based on contentassociated keys.The main idea of the video encryption algorithm is to divide the content of H.265 files through the analysis of the coding structure of H.265,divide various parameter sets and various parts of different coded images into content with different degrees of importance,and then according to the degree of importance extracts these contents and saves the extracted data as a key.In terms of design,the algorithm is divided into two parts:content positioning algorithm and content extraction algorithm.The function of content positioning algorithm is to locate each part of the divided content,and the function of content extraction algorithm is to extract the content of each part after division.Encrypt the content.In order to reduce the waste of storage space,this article also combines the characteristics of the video encryption algorithm to design the key structure in detail.In order to verify the effectiveness of video encryption algorithms,in addition to theoretical analysis,this article also designs a series of encryption experiments to verify the effect of video encryption.The experimental results and analysis show that the H.265 video encryption algorithm based on the content association key has good performance in encryption effect,performance and security.