一种基于圆环冗余解析的抗旋转与剪切攻击的信息隐藏算法
2017-02-16石方夏任帅娄棕棕张弢
石方夏+任帅+娄棕棕+张弢



摘 要: 针对基于数字图像信息隐藏技术的抗旋转性和抗剪切性的要求,提出一种基于空间域环形冗余解析的信息隐藏算法。将数字图像按照颜色空间模式进行分解,选择能量较小的分量作为载体图像进行圆环等量分割,并通过修改圆环区域的像素均值达到嵌入信息的目的。该算法采用在以圆心对称的环形区域内嵌入相同秘密信息的方法,可有效抵御旋转性攻击和抗剪切性;通过改变圆环数和区域面积以增减嵌入的信息量,且不可见性不随嵌入容量的增减而改变;信息隐藏分析检出率小于4.35%。实验表明该算法具有良好的抗旋转性、抗剪切性以及抗分析性能。
关键词: 信息隐藏; 灰度圆环区域; 环形冗余解析; 颜色空间
中图分类号: TN918?34; TP391.4 文献标识码: A 文章编号: 1004?373X(2017)01?0036?05
Abstract: To satisfy the requirements of the anti?rotation and anti?cutting performance of the information hiding technology based on digital image, an information hiding algorithm based on spatial domain lαβ annulus redundancy analysis is proposed. The digital image is decomposed according to the lαβ color space mode, and then and components with small energy are selected as the carrier images for equal segmentation of the annulus. The modification of the pixel mean value in the annulus can realize the purpose of information embedding. The method of embedding the same secret information in the annulus area with the circle center symmetry is adopted in the algorithm to resist the rotation attack and anti?cutting performance effectively. The change of annulus quantity and region area can regulate the embedded information content, and the invisibility doesn′t change with the embedded capacity. The detection rate of the information hiding analysis is less than 4.35%. The experimental results show the algorithm has good anti?rotation, anti?cutting performance and anti?analysis performance.
Keywords: information hiding; gray?scale annulus area; annulus redundancy analysis; color space
0 引 言
基于数字图像的空间域信息隐藏技术是目前信息内容安全的主要实现形式之一,是目前主流的应用途径。在空间域算法中,文献[1]针对现有的直接位平面替换算法,提出一种基于RGB颜色空间的改进的位平面信息隐藏算法,该算法考虑RGB三个颜色分量的视觉敏感性以及各颜色空间的区域复杂性,将秘密信息按照一定的规则嵌入到RGB分量的低层位平面。算法不可见性强,嵌入率较高;文献[2]通过对载体图像和秘密图像分别置乱,然后对载体图像分块,在每块子图像中重复嵌入1 b信息,提出一种抗JPEG压缩和掩密分析的空间域图像信息隐藏算法,该算法对常见的JPEG压缩具有较好的鲁棒性;……
