OVERVIEW OF STEGANOGRAPHY IN IMAGE

Steganography is a technique to hide secret data in a digital object such as video, image, audio, databases, DNA sequences, and text,... The main purpose of hiding information is to make it impossible for others to recognize, the robustness, and the amount of information hidden in the digital objects. This paper summarizes the steganographic techniques in digital images as well as some basic concepts in the field of data security and safety through data hiding. Some methods of hiding data in JPEG format are also discussed in this paper. By synthesizing some techniques for hiding information in images, we aim to provide basic knowledge, thereby motivating scientists to research methods to improve the quality andembedded capacity in images and be able to avoid attacks.