摘要
通过对基本层选择性加密算法进行时域、空域相关性主动攻击,发现加密视频的前后帧存在严重的视频相关性,没有获得较好的加密效果.提出基于主动攻击安全的可扩展FGS加密算法,制定并实现了基本层和增强层同时加密的安全策略.在基本层和增强层同时加密时,通过对大量QCIF视频序列的测试,本文提出的基本层和增强层同时加密算法,无论在加密速度、加密效果以及回放质量上,都获得了较佳的实验效果.
Attacking actively to the relativity of temporal and spatial with the baselayer selective encryption algorithm,this paper finds that the relativity of interframe is very serious in the encryption video sequences,the effect of encryption is unreached, and proposes an active attack security based extensible FGS encryption algorithm and employ a strategy of encrypting both base layer and enhancement layer. Based on the experiments on sufficient QCIF video sequences,this encryption algorithm both base layer and enhancement layer show good effect in the encryption speed, encryption effect and play-back quality.
出处
《小型微型计算机系统》
CSCD
北大核心
2008年第8期1395-1399,共5页
Journal of Chinese Computer Systems
基金
国家自然科学基金项目(60573132)资助
国家自然科学基金项目(60503063)资助
深圳市项目(200507)资助
关键词
可扩展编码
FGS
伪随机序列
视频加密
fine granularity scalable
scalable coding
pseudo-random sequence
video encryption
