An Investigation of Steganalysis Techniques

Abstract

Steganography is the art of con dential communication. Steganography has a long history, which can be traced back to 440BC, and it is currently being exploited by digital technology in the modern world. The digital carrier that it uses can be of several di erent types, such as digital text, disk space, network packets, software, digital audio and digital images. Steganalysis, the countermeasure to steganography, is designed to detect and analyse the hidden data disseminated throughout a medium by steganography. This thesis focuses on investigating steganalysis techniques. To this end, it presents a review of both steganography and steganalysis before analysing and comparing three di erent steganalysis techniques. The steganalysis techniques we have investigated are the Histogram Characteristic Func- tion (HCF) Technique, the Regular-Singular Analysis (RS) Technique and Raw Quick Pair (RQP) Technique. This thesis presents a comprehensive summary of the perfor- mance, characteristics and limitations of these three techniques.