一种安全的无载体纹理合成信息隐藏方案

为了有效抵御Zhou等8]针对Wu等7]提出的无载体纹理合成信息隐藏方案的攻击,设计出一种基于有限整数网格上拟仿射变换(QATLIG)的纹理合成无载体信息隐藏方案。该方案通过在纹理合成过程中嵌入干扰纹理块,来抵御文献8]提出的攻击。其中,干扰纹理块的具体位置,由样本纹理源补丁块的坐标通过QATLIG变换而得。同时该方案将QATLIG变换系数纳入密钥中。分析及实验表明,该方案保持了文献7]方案的生成纹理图像质量,信息隐藏容量损失极小(约1.46%~7.11%),隐藏的信息被暴力破解的概率极低(远小于10-5),可有效抵御文献8]的攻击方案。

A SECURE COVERLESS TEXTURE SYNTHESIS INFORMATION HIDING SCHEME

In order to effectively resist Zhou H et al.s attack on the coverless texture synthesis information hiding scheme proposed by Wu et al.,we designed a coverless texture synthesis information hiding scheme based on quasi-affine transformation on limited integer grids(QATLIG).This scheme defended against attacks by Zhou H et al.by embedding interference texture blocks in the texture synthesis process.The specific location of the interference texture block was obtained by transforming the coordinates of the sample texture source patch block by QATLIG,and the scheme incorporated the QATLIG transform coefficient into the secret key.Analysis and experiments show that the scheme maintains the texture image quality generated by Wu et al.,and the information hiding capacity loss is extremely small(about 1.46%~7.11%).The probability of hidden information being violently cracked is extremely low(far less than 10-5),and it can effectively resist the attack scheme of Zhou H et al.