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Lazy Wavelet Transform Based Steganography in Video

Visual steganography is the most widely practiced form of steganography. It started with concealing messages within the lowest bits of noisy images or sound files. We shall perform steganography on video files and hide the message in an encrypted format, thus achieving a multiple cryptographic system. The most commonly used technique is Least Significant Bit steganography (LSB steganography). But instead of traditional LSB encoding, we will use a modified encoding technique which will first transform the video using a Lazy Lifting Wavelet transform and then apply LSB in the sub-bands of the video that has been obtained. The proposed approach to video steganography utilizes the visual as well as the audio component. The lazy wavelet transform is applied to the visual frames, and the data is stored in the coefficients of the visual component. The length up to which it is stored is hidden using LSB in the audio component. Experimental results show that the proposed technique does not affect the higher and lower ends of the frequency distribution of the signal. Moreover, it has a high payload capacity and low computational requirements.