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Image steganography based on LSB substitution and encryption method: adaptive LSB+3

机译:基于LSB替换和加密方法的图像隐写术:自适应LSB + 3

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摘要

The goals of image steganography are to simultaneously reach maximum embedding capacity, enhanced embedding efficiency, better image quality, and more security. We present a two-step data hiding method that improves image quality, capacity, and embedding efficiency, and also provides stego security. In the first step of the proposed method, the hidden data are encrypted with the key words and shifting method to provide security. In the second stage, we propose adaptive least-significant-bit (LSB)+3 type I and adaptive LSB+3 type II methods to hide encrypted data in the cover image. The image quality of the stego image obtained from the proposed adaptive LSB+3 method is better than the traditional three-bit LSB methods. When maximum data are embedded in the cover image, a peak signal-to-noise ratio (PSNR) greater than 41 dB is reached. Experimental studies show that adaptive LSB+3 type I and adaptive LSB+3 type II methods are higher PSNR values (3.48% and 5.73%) than the standard three-bit LSB substitution methods. (C) 2019 SPIE and IS&T
机译:图像隐写术的目标是同时达到最大的嵌入容量,增强的嵌入效率,更好的图像质量和更高的安全性。我们提出了一种两步数据隐藏方法,该方法可以提高图像质量,容量和嵌入效率,并提供隐秘的安全性。在提出的方法的第一步中,隐藏的数据使用关键字和移位方法进行加密以提供安全性。在第二阶段,我们提出了自适应最低有效位(LSB)+3类型I和自适应LSB + 3类型II方法来在封面图像中隐藏加密数据。通过提出的自适应LSB + 3方法获得的隐身图像的图像质量优于传统的三位LSB方法。当在封面图像中嵌入最大数据时,将达到大于41 dB的峰值信噪比(PSNR)。实验研究表明,自适应LSB + 3 I型和自适应LSB + 3 II型方法比标准的三位LSB替代方法具有更高的PSNR值(3.48%和5.73%)。 (C)2019 SPIE和IS&T

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