A review of steganography techniques

Due to the importance, security, confidentiality, privacy, and progress of information at present due to the development in the field of information technology, sharing this information (text, image, audio, video) has become a critical problem due to the exposure of this information to penetration by attacking parties, and to solve the problem of penetration, many technologies have appeared to protect This information (text, image, audio, video) is cryptography algorithms and information steganography techniques. Steganography is a science that maintains the confidentiality of information (text, image, audio, video) between two communicating parties (the sender and the receiver), and it is a science that studies the invisible communication of information. In this paper, the researcher reviewed the most important techniques of previous studies for the last six years, such as LSB, PVD, DFT, DWT, DCT, Masking & Filtering, Distortion, and Statistical. In the science of hiding information, and analyzing it in terms of technical domain, invisibility, capacity, and complexity, all of these techniques can hide this information from hostile attacks. In this paper, the evaluation criteria for hiding the information (text, image, audio, video) were reviewed in terms of imperceptibility, robustness, capacity, and security. Also, the most important applications of hiding techniques (text, image, audio, video) were reviewed in this paper.