摘要
视频作为目前最广泛的流媒体之一,其版权保护逐渐得到人们的重视.为了对视频文件进行保护,从加密算法、索引序列和关键帧加密三个角度,设计了一套基于关键帧加密的视频保护方案.首先利用AES算法对解码前视频流的关键帧进行加密;然后利用MD5对I帧及其随后的连串的B、P帧产生索引序列,保证数据的安全性与完整性.方案避免了转码过程出现的失真与大量时耗,同时利用了FFmpeg良好的视频编解码处理能力,克服了单纯靠加密算法保证安全的单一性;最后在理论与实验中分析了其安全性、实用性和高效性.
Video is one of the most extensive streaming media and the protection of its copyrights is gradually drawing more and more attentions. A video protection scheme based on key-frames is presented from three directions, Encryption Algorithm, Index Sequence and Key-frames Encryption for protecting the video files. Firstly, the AES algorithm is applied to encrypt the key-frame of the video streaming before decoding it. Then, the MD5 algorithm is used to generate index sequence of I frame and a series of B frames and P frames to ensure data security and integrity. The distortion and a large number of time-consuming are avoided during the transeode FFmpeg＇s good ability in video encoding and decoding is process in this scheme used to overcome the singularity which caused by simply relying on the encryption algorithm. Finally, it is analyzed from theory and practice about this scheme＇s safety, practicality and efficiency.
出处
《汕头大学学报（自然科学版）》
2014年第2期60-66,共7页
Journal of Shantou University：Natural Science Edition
基金
国家自然科学基金项目(61103244)
广东省自然科学基金项目(S2011010004197)
广东省工程研究中心
广东高校优秀青年创新人才培养计划项目(LYM11064)
汕头市科技计划项目(2011-134-149)
汕头大学创新团队项目(ITC12001)
关键词
关键帧
视频保护
编解码
索引序列
加密算法
key -frames
video protection
encode and decode
index sequence
encryption algorithm
