基于RSA加密和DS算法嵌入的DWT变换域图像隐写

为提高秘密数据安全性并保持载体图像良好的视觉质量,本文提出了一种基于RSA算法加密和DS算法嵌入的离散小波变换(DWT)域图像隐写方法.首先借助经典的RSA算法对数据进行加密,秘密数据被转换成密文,借助二维离散小波变换域的修正细节系数,利用DS算法将已加密的秘密数据嵌入载体图像,并分析了接收端对秘密数据的复原过程.最后,借助MATLAB软件对本文提出的方法进行验证,并用峰值信噪比(PSNR)对结果进行评估.结果表明,本文提出的方法能有效增强秘密数据的安全性并能保证载体图像的视觉质量,因此具有可行性和有效性.本文隐写机制高度安全,在信息安全领域具有良好的应用前景.

Image Steganography Based on RSA Algorithm for Encryption and DS Algorithm for Embedding

To enhance the security of secret data and maintain good vision quality of carrier images , a method of image steganography based on RSA algorithm for encryption and DS algorithm for embedding in DWT domain was proposed in this paper .Starting from the principle of RSA algorithm , the implement method of image steganography in discrete wavelet transform domain was expounded .Then, processes of RSA algorithm for en-cryption and DS algorithm for embedding were analyzed in detail , and the recovery process of secret data in re-ceiving terminal was introduced .Finally, the proposed method was verified by the software of MATLAB and the results were estimated by peak signal to noise ratio （ PSNR） .The results show that the proposed method can en-hance the security of secret data effectively and maintain vision quality of carrier images , so it has the feasibility and effectiveness .