Chapter 2Steganography and Steganalysis

Ho Thi Huong Thom, Nguyen Kim Anh

Faculty of Information Technology, Vietnam Maritime University, Haiphong, Vietnam

Email: thomhth@vimaru.edu.vn, kimanhnguyen@vimaru.edu.vn

Abstract

Steganography is the art and science of concealed communication. The basic concept is to hide the very existence of a secret message. Digital objects, such as a text, image, video, or audio, can be used as the cover data. Steganalysis is the counterpart of steganography. The goal of steganalysis is to detect the hidden message, equivalently, to discriminate the stego-object from the non-stego-object. In addition, it has the scientific significance of enhancing the hidden ability of hidden techniques. In this chapter, we will present an overview of the research and solutions for the problem of hidden image detection.

Keywords: Cover image, stego image, hiding information, steganography, steganalysis, watermarking

2.1 Introduction

Hiding information refers to the problem of hiding important information in other objects. History shows that hiding information began thousands of years ago. From stories of the ancient Greeks, we know that they devised a way to exchange information between allies by shaving the heads of slaves, carving secret information into their scalps, waiting for their hair to grow back and sending them to meet allies. We also know of a method of writing secret information with animal milk, fresh lemon juice or vinegar on white paper; after ...

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