Research On HEVC Video Encryption Technology Based On Compound Chaotic System

The development of Internet technology has promoted the advancement of video technology.Large-screen advertisements played in shopping malls can provide consumers with effective shopping information and enrich the facilities of the mall.The rise of the live broadcast industry has made people have very high requirements for video clarity,which has also contributed to the improvement of video technology.The H.264/AVC coding standard was put forward in 1995.It has been 25 years since the old video coding technology can no longer meet the needs of current development.HEVC coding technology has become the mainstream video coding technology.Video security transmission has always been a Very important issue,video encryption is an important means to protect video security,so it is necessary to study HEVC video encryption technology^[1].Predecessors have proposed many video encryption methods for video security transmission.Many scholars have proposed video encryption technology based on the H.264/AVC coding standard^[2],but the H.264/AVC coding standard has been difficult to adapt to the current Internet technology.For development and people's daily needs,some scholars have proposed a video encryption scheme based on the HEVC coding standard^[3],but the encryption technology is complex and difficult to meet real-time encryption,which will affect the efficiency of video encryption.Therefore,this paper proposes a HEVC-based encoding The video encryption technology of the standard composite chaotic system,the video information is actually composed of image information frame by frame.Therefore,considering the image encryption technology and video encryption to be linked,an improved Joseph traversal and segmented logistic mapping image is proposed.Encryption algorithm.Combine the encryption algorithm with the DCT variation coefficient and motion vector process in HEVC encoded video to obtain the HEVC video encryption algorithm based on the composite chaotic system.The simulation experiment is used to obtain the effect diagram of video encryption.Through video encryption The detection index analyzes the encryption algorithm in this paper.This paper first introduces the basic theoretical knowledge of chaotic systems and the basic knowledge of cryptography,researches on image encryption algorithms and proposes the design ideas of composite chaotic systems.The original image is diffused through Joseph scrambling and segmented logistic mapping to obtain a two-dimensional pseudo-random The sequence,followed by the overview and structure of HEVC coding,introduced the basic knowledge of HEVC coding technology,introduced several important processes of HEVC coding,selected DCT variation coefficients and motion vectors through analysis,and selected suitable binarization methods for syntax Element encryption combines image encryption and video encryption.The simulation results show that the HEVC video encryption algorithm based on the composite chaotic system has good encryption effects.The composite chaotic system in the video encryption algorithm uses low-dimensional chaotic mapping,which has low computational complexity and can achieve real-time Encryption has a wide range of applications,and the bypass coding in entropy coding is selected as the encryption channel during encryption,which will not change the video code stream and video compression ratio,so real-time encryption can be better realized.