基于国密算法的视频媒体文件加密效率提升技术

随着计算机网络和无线通信等技术的发展, 有关视频媒体文件的版权保护和信息安全问题日益成为人们关注的焦点, 对视频媒体文件加密是一种有效保护信息安全的方式, 传统的视频文件加密方法需要对视频媒体文件中所有的视频帧数据进行加密, 文件加密的效率较低, 加密过程比较耗时. 本文针对H.264/AVC视频帧的结构特点, 提出了一种基于国产SM2算法的视频媒体文件加密效率提升的方法, 该方法在加密视频媒体文件的过程中只加密视频数据中关键帧的NALU Header信息, 在检测到H.264分片的情况下同时也需要对non-IDR Header信息进行加密. 实验结果表明该方法可以在有效加密视频媒体文件的同时减少了加密所需的时间, 明显提升了视频媒体文件的加密效率.

Encryption Efficiency Improvement Technology of Video Media File Based on National Secret Algorithm

With the development of technologies such as computer networks and wireless communication, copyright protection and information security issues of video media documents have become increasingly the focus of people’s attention, and video media file encryption is a way to effectively protect information security. Traditional video file encryption methods need to encrypt all video frame data in video media files. The efficiency of file encryption is relatively low, and the encryption process is time-consuming. Therefore, a method for improving the efficiency of video media file encryption based on the Chinese SM2 algorithm is proposed according to the structural characteristics of H.264/AVC video frames. This method only encrypts the NALU Header information of the key frame in the encrypted video media during video media file encryption. In the case of detecting H.264 shards, it is also necessary to encrypt the non-IDR Header information. The experimental results show that the method can effectively encrypt video media files while reducing the time required for encryption, thus significantly improving the encryption efficiency of video media files.