A Review of Steganography Techniques for Digital Information Transmission for Secure Channels with Digital Images

The methods of hiding information developed for steganography have evolved in the direction of increasing the volume of embedded data, imperceptibility and reliability, preserving the quality of the digital image to go unnoticed. The essential methods combined symmetric or asymmetric cryptography to find security techniques. The purpose of this paper is to show different approaches used for steganography; an exciting combination of mathematical algorithms is taught to keep the essential principles of hiding information. This paper shows a compilation on the development and application of different steganography methods that have been presented in the area of information security to analyze the progress that has been made, encompassing validation methods of steganography techniques, which include metrics of quality such as PSNR, MSE, SSIM among others and statistical techniques such as analysis by histogram, RS, chi-square, among others; these techniques are great importance because they set the standard to verify the reliability and robustness of signal that contains hidden message.