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.
出处
《计算机工程与应用》
CSCD
北大核心
2007年第36期97-99,106,共4页
Computer Engineering and Applications
关键词
小波变换
安全
密写
DWT
security
steganography
