CAJ | 학술논문

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。
위제고비밀수거안전성병보지재체도상량호적시각질량，본문제출료일충기우RSA산법가밀화DS산법감입적리산소파변환（ DWT）역도상은사방법。수선차조경전적RSA산법대수거진행가밀，비밀수거피전환성밀문，차조이유리산소파변환역적수정세절계수，이용DS산법장이가밀적비밀수거감입재체도상，병분석료접수단대비밀수거적복원과정。최후，차조MATLAB연건대본문제출적방법진행험증，병용봉치신조비（ PSNR ）대결과진행평고。결과표명，본문제출적방법능유효증강비밀수거적안전성병능보증재체도상적시각질량，인차구유가행성화유효성。본문은사궤제고도안전，재신식안전영역구유량호적응용전경。
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 .