一种安全图像小波域密写方案  

Secure steganographic algorithm in DWT images

作　　者：邓新文[1] 王国才[1] 李娟[1] 曾英[1] 向元平[1] 

机构地区：[1]中南大学信息科学与工程学院,长沙410075

出　　处：《计算机工程与应用》2007年第36期97-99,106,共4页Computer Engineering and Applications

摘　　要：提出了小波域在中频可调节系数范围δ和θ之间保持直方图统计特性不变的安全密写方案。该方案不仅能抵抗直方图统计分析,还能抵抗压缩编码。实验对比表明,安全性明显提高。Although it is very meaningful to embed secret messages into a cover image in DWT,an analyst can detect the presence of hidden data according to a change of DWT coefficient histogram.In order to improve the security of embedded information,a secure steganographic technique is proposed,in which middle frequency DWT coefficients between δ and θ are used to carry the secret bits when the DWT coefficient histogram property is reserved.In this way,not only the histogram-based steganalyses hut also the compression-coding are effectively resisted.

关 键 词：小波变换 安全 密写 

分 类 号：TP391.08[自动化与计算机技术—计算机应用技术]