Design And Implementation Of Chaotic Video Encryption System Based On FPGA And H.265

In recent years,with the continuous development of computer technology and network technology,the application of video telephony,live video and video surveillance is becoming more and more popular.Video communication is used more and more frequently in people’s information exchange.While video application brings convenience to human life,how to protect video information security has become a problem to be solved.Aiming at the security of video information,this paper designs a chaotic video encryption system.By analyzing the composition and structure of H.265 coded stream,important parts are selected for selective encryption.Logistic chaotic system and Henon system are used in encryption,and the Logistic system is improved.By using Logistic chaotic system with three different parameters to iterate next time according to the value of chaotic sequence,the complexity of the system is increased and the security of encryption is improved.We choose to implement the encryption algorithm on the FPGA equipped with dual-core ARM Cortex-A9 processor,which improves the encryption efficiency by utilizing the parallel computing ability of the FPGA.At the same time,the construction of embedded Linux platform on FPGA facilitates the design of video data transmission program and the transplantation of video processing software ffmpeg,and effectively solves the problem of video transmission and encrypted direct object H.265 video stream acquisition.The experimental results show that the encryption system can better protect the security of video information,and has a certain practical value.