An Overview of Steganography

Abstract

Nowadays, due to the increasing need for providing secrecy in an open environment such as the internet, data hiding has been widely used. Steganography is one of the most important data hiding techniques which hides the existence of the secret message in cover files or carriers such as video, images, audio or text files. In this chapter; steganography will be introduced, some historical events will be listed, steganography system requirements, categories, classifications, cover files will be discussed focusing on image and video files, steganography system evaluation, attacks, applications will be explained in details and finally last section concludes the chapter.