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首页> 外文期刊>Journal of ambient intelligence and humanized computing >A stable image steganography: a novel approach based on modified RSA algorithm and 2-4 least significant bit (LSB) technique
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A stable image steganography: a novel approach based on modified RSA algorithm and 2-4 least significant bit (LSB) technique

机译：一种稳定的图像隐写术：一种基于改进RSA算法的新方法和2-4个最低有效位（LSB）技术

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摘要

Nowadays, due to the rapid technological growth of information technology billions of data transferred through the network around the world in a fraction of seconds. To protect the transferred information from unauthorized access, security mechanism is required. At this point, significant role is performed by a technology called information security. So, to provide security, various techniques have been evolved such as cryptography, steganography and digital watermarking. Cryptography converts the message into scrambled format whereas in steganography the secret message is buried in the digital media. In this paper, both cryptography and steganography is combined to safeguard the information. First, the message is encrypted with the help of revised RSA algorithm to convert the message into secret message. Second, the cover image is segmented into edge and non-edge pixels using Canny edge detection technique and then N1(two) and N2 (four) bits of the secret messages are buried into the edge and non-edge pixel areas using LSB technique. Finally, the essential parameters like N1, N2 and the length values are implanted into the last four pixels of the cover-image to obtain the stego-image. At the recipient side, the hidden data are extracted from the stego-image after extracting N1, N2 and length information. Then, the extracted secret data is decrypted using revised RSA algorithm. Modified RSA algorithm improves the security by using two pairs of keys. At last, the various performance metrics parameters such as entropy, MSE, peak signal to noise ratio and histogram are measured. It is observed that the proposed system attains improved efficiency, security and imperceptibility properties of information hiding from the results.
机译：如今，由于信息技术的快速技术增长，数十亿数据通过网络转移到世界各地几秒钟。要保护转移的信息免受未经授权的访问，需要安全机制。此时，通过称为信息安全性的技术执行重要作用。因此，为了提供安全性，已经进化了各种技术，例如加密，隐写术和数字水印。加密将消息转换为扰乱格式，而在隐写术中，则秘密消息被埋在数字媒体中。在本文中，将密码术和隐写术组合以保护信息。首先，借助修改的RSA算法将消息转换为秘密消息。其次，覆盖图像被分段为边缘，并且使用Canny Edge检测技术分段，然后使用LSB技术将秘密消息的N1（2）和N2（四）比特埋入边缘和非边缘像素区域。最后，将N1，N2和长度值等基本参数植入到封面图像的最后四个像素中以获得STEGO图像。在接收方面，在提取N1，N2和长度信息之后，从STEGO图像中提取隐藏数据。然后，使用修改的RSA算法解密提取的秘密数据。修改的RSA算法通过使用两对键来提高安全性。最后，测量诸如熵，MSE，峰值信号和直方图的各种性能度量参数。据观察，拟议的系统达到了从结果中隐藏的信息的效率，安全性和难以察觉的特性。

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