摘要
现有格式兼容的加密算法在安全性、可操作性和解码耗时等方面各有优劣。针对上述情况,提出一种新的视频加密算法。该算法根据MPEG视频标准,通过改变宏块条竖直位置值进行置乱,实现图像的加密。理论分析与仿真实验结果证明,该算法简单易行,安全性高,加密数据量少,加密速度快,且对数据压缩率无影响。
Format-compliant video encryption algorithms have their own merits and defects on safety,operability and decoding time-consuming.Aiming at the situation,this paper proposes a novel format-compliant video encryption algorithm which is convenient,secure,fast and has no effect on the compression ratio.Videos are encrypted by permutation through changing the value of the vertical position for macro-blocks.Simulation results on two standard video sequences show that compared with the original one,the new algorithm is more effective.
出处
《计算机工程》
CAS
CSCD
北大核心
2010年第20期145-146,149,共3页
Computer Engineering
基金
国家"863"计划基金资助项目"虚拟植物可视化引擎关键技术研究"(2006AA10Z233)
国家自然科学基金资助项目"生理引擎驱动的虚拟植物多分辨率展示关键技术研究"(60773082)
关键词
格式兼容
宏块条竖直位置
一一映射加密
format-compliant
macro-block-vertical position
one-to-one mapping encryption
