Enhanced Image Hiding in Audio Stegnography using Discrete Cosine Transform and Skin Detection

Enhanced Image Hiding in Audio Stegnography using Discrete Cosine Transform and Skin Detection
Authors:B.SREEDHAR, D.VIJENDRA KUMAR

Abstract: Now days, security is an important problem in hacking technologies such as internet, digital devices and so on. To solve the security problem, we can use one of the method called steganography. The paper presents the hiding security image into audio signal. For hiding image in audio, skin detection and discrete cosine transform are used. In audio steganography, hiding image is also called cover or host image. The process of hiding cover image into audio signal is called stego signal. The proposed method is effective and less time efficient. The experimental results shows the invisible image in audio signal after embedded step and recover the security image accurately without distortion at decoding stage. 

Keywords: Skin Detection, DCT, Audio Data Hiding and Steganography. 

INTRODUCTION 

       The Steganography word is come from the Greek words “stegos” meaning “cover” and the name “grafia” as “writing” defining it as “covered writing” [1]. Steganography definition of hiding information “in plain sight”. This technique relies on a message being encoded and hidden in a transport layer in such a way as to make the existence of the message unknown to an observer [2]. The notion of data hiding or steganography was first introduced with the example of prisoners' secret message by Simmons in 1983 [3]. Watermarking is similar to steganography. It is “the practice of imperceptibly altering a Work to embed a message about that Work” [4]. Steganography satisfy two requirements. The first requirement is transparency that is hostimage (image containing any some data) and stego image (image containing secret information) must be perceptually indiscernible. The second requirement is the high data rate of the encodedata [5]. In a computer based secret messages, audio Stenography system are embedded in digital audio. Used audio signal as a hostimage to audio Stenography [5]. 

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