ABSTRACT
Modern techniques in steganography have far more powerful tools. Digital steganography is the art and science of hiding information into covert channels, so as to conceal the information and prevent the detection of the hidden message. Steganography can be divided into three types there are technical, linguistic, and digital. Technical steganography applies scientific methods to conceal secret messages while linguistic steganography uses written natural language. Linguistic steganography utilizes written natural language to hide information. It can be categorized into semagrams and open codes. Digital steganography, developed with the advent of computers, employs computer files or digital multimedia data. The basic applications of steganography relate to secret communications. Steganography embeds secret messages into innocuous files. There are many steganographic tools available for hiding messages in image, audio, and video files. The chapter provides a discussion on S-Tools, StegoDos, EzStego, and JSteg-Jpeg.
