加密视频播放系统设计与实现及其安全性分析  

Design and implementation of encrypted video playback system and its security analysis

作　　者：林浩 黄一平[1] 梁梓辰 LIN Hao;HUANG Yiping;LIANG Zichen(College of Electronic and Information Engineering,Guangxi Normal University,Guilin 541004,China;College of Computer Science and Engineering,Guangxi Normal University,Guilin 541004,China)

机构地区：[1]广西师范大学电子与信息工程学院,广西桂林541004 [2]广西师范大学计算机科学与工程学院,广西桂林541004

出　　处：《电子设计工程》2024年第12期150-156,161,共8页Electronic Design Engineering

基　　金：桂林市重点研发计划项目(2020010301);2019年广西第四批创新驱动发展专项资金项目(桂科AA19254001)。

摘　　要：通过分析传统加密视频安全性及需要先解密后播放带来的体验不友好现状,设计并实现一个基于安卓平台的加密视频播放系统。该系统使用经国家密码管理机构认证的加密芯片管理密钥,通过SM2算法与SM4算法相结合的方式加密视频并重新设计密文视频结构,实现视频的安全存储;通过改进ExoPlayer开源视频播放器的播放算法,实现密文视频的实时查看,提升用户体验;该系统还具有密文视频解密导出、密文视频分享查看等功能,可以满足用户的日常使用需求。测试结果表明,该系统生成的密文视频具有较高的安全性,加解密速度约为6 MB/s,满足实时播放要求。目前,该系统已在企业进行试用,有广阔的应用前景。By analyzing the security of traditional encrypted video and the unfriendly experience caused by the need to decrypt the video before playing,an encrypted video playing system based on Android platform is designed and implemented.The system uses the encryption chip certified by the national password management agency to manage the key,encrypts the video through the combination of the SM2 algorithm and the SM4 algorithm,and redesigns the ciphertext video structure to realize the safe storage of the video;By improving the playback algorithm of an opening source video player named ExoPlayer,real⁃time viewing of ciphertext video is realized and user experience is improved;The system also has functions such as decryption and export of ciphertext videos,sharing and viewing of ciphertext videos,which can meet the daily use needs of users.The test results show that the ciphertext video generated by the system has high security,the encryption and decryption speed is about 6 MB/s,meeting the real⁃time playback requirements.At present,the system has been tested in enterprises and has broad application prospects.

关 键 词：加密芯片 国密算法 视频加密 视频播放 视频分享 

分 类 号：TN709[电子电信—电路与系统]