Robust multi layer audio steganography

In this paper a robust audio steganography method is introduced which involves multiple layers for embedding secret data. In LSB technique generally a single or multiple bits are embedded always in one or some particular bit positions. So it is easy to get that data by knowing those positions. The robustness increases in LSB approach by considering higher LSB layer but it reduces the perceptibility of audio. Here in this proposed work LSB embedding is used in multiple layers and also capacity is increased by embedding two bits at a time. Here always two different pairs 01 and 11 are embedded instead of four, made using two bits at a time at the same time increases robustness more. Without knowing the bitwise operation applied here for extraction it is not also very much easy to get the actual data. After embedding flag setting and bit adjustment is done for maintaining the perceptual transparency of stego audio. Here in this proposed work capacity is also increased by considering 6 bit binary instead of 7 or 8.

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