【摘要】 由于公用网络处于完全开放的状态,一些涉及机密或隐私的视频数据是不能直接传输的,必须采取某种技术手段对视频信息进行保护。视频加密是一种有效的安全防护手段,而传统的加密算法计算复杂度高不适用于加密视频信息。本文对经典混沌系统进行改进,提出了一种新的混沌流密码,该密码系统安全性高、运行速度快,可以满足视频应用的实时性要求。同时,针对压缩后的视频监控码流进行码流分析和数据提取,在确保码流格式兼容性的前提下,对视频数据部分进行加密操作,实现了监控视频数据的实时加密传输。更多还原

【Abstract】 With the rapid development of computer network communication technology and video compression coding technology,video applications based on network transmission have become an indispensable part of people’s lives. However,since the public network is completely open,some video data involving confidentiality or privacy cannot be directly transmitted,and some technical means must be used to protect the video information. Video encryption is an effective security protection method,and the traditional encryption algorithm cannot apply to encrypt video information due to high computational complexity. At the same time,the code stream analysis and data extraction are performed on the compressed video surveillance code stream. Under the premise of ensuring the compatibility of the code stream format,the video data part is encrypted,and the real-time encrypted transmission of the monitoring video data is realized.更多还原