Author
Abstract
In this paper steganalysis technique is proposed on the basis of spectral
domain analysis using Discrete Fourier Transform, Fast Fourier Transform Algorithm
(DFT_FFTA). The aim from using this algorithm is to provide robust evidence for
presence of hidden object in speech segment. The Discrete Wavelet Transform
(DWT) is used to decompose the speech segment, 20 seconds in length. The speech is
decomposed to the third level. An image of 512x512 pixels embedded in the third
level of the speech coefficients. Reverse Discrete Wavelet Transform (RDWT) is
applied to get a speech with hidden object (image) called stego-speech. DFT_FFTA is
used to analyze the stego-speech to discover an evidence of hidden object in the stegospeech
.Experimental results shows that the proposed algorithm is comparable to
previously existing techniques and give very clear and strong indication for the
existence of stego-object
Keywords
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