多级秘密信息隐藏方法

Multilevel secret information hiding method

针对普通的一级秘密信息隐藏的方法具有安全性低,视觉效果差的问题,本文提出了一种多级别信息隐藏的方法。该方法使一级秘密信息在一级密钥作用下成为宿主图像,提高了信息隐藏的安全性.,再将宿主图像分成3×3的图像块,在二级密钥的控制下成功将二级秘密信息嵌入。采用图像置乱和LSB算法的结合方法,并在两级秘密信息的作用下,使得载密图像的抗攻击能力增强。实验结果表明,本算法得到的载密图像峰值信噪比高,提高了秘密信息的安全性。

For the ordinary method of hiding a secret information is secure low, the problem of poor visual effects, this paper presents a multi-level information hiding method. In this scheme, we make a secret information becom a cover image under the first-class key, improve the security of information hiding. Then divides the cover image into blocks of size 3 ~ 3,embed the second-class secret information key into the cover image under the second-class key. LSB with image scrambling algorithm and the combination of methods, and the role of two secret information, making the stego image enhancement of anti-attack capability .Experiment demonstrates that this scheme got a highter psnr, enhance the security of the information hiding.