一种抗RS攻击的隐写算法

Steganographic method robust to RS steganalysis

针对RS隐写分析方法,提出了一种改进的LSB信息隐藏算法以抵抗RS攻击。该算法首先运用一般的LSB隐写方法将秘密信息随机嵌入掩体图像中,然后利用离散二进制粒子群优化技术对嵌入信息后的stego图像进行有效的灰度值调整,使得修改后的stego图像不被RS隐写分析方法检测到秘密信息的存在。实验结果表明,该算法能有效抵抗RS隐写分析,且算法性能稳定。

To improve the robustness of the simple least-significant-bit （LSB） substitution method, a new information hiding algorithm based on LSB substitution is proposed. This method first embeds secret messages into the cover-images through the simple LSB substitution method and obtains the original stego-images. And then it employs the discrete binary version of particle swarm optimization （PSO） algorithm to adjust the gray scale of the original stego-images. By doing so, the RS steganalysis method can not detect the existence of secret messages in the revised stego-images. The experiments show that the proposed method is robust to RS steganalysis and performs steadily.