Information has to face certain data security related issues like confidentiality, message integrity, authorization etc while transmitted over internet, therefore need to design appropriate mechanism and techniques that ensures secrecy of private information while it is communicated over public networks has turn out to be an urgent and desired research problem. Steganography has been widely used in historical times and the also currently used with intensive interest. The advantage of steganography over cryptography is that it doesn’t raise any suspicion and the message can be exchanged over a public communication channel. It is an ongoing research area having vast number of applications in distinct fields such as defense and intelligence, medical, on-line banking, on-line transactions handling, for various financial and commercial applications, to stop music piracy etc. In this paper a modified interpolation based method is used with adaptable range table to embed in pixels of interpolated image with secret bits. Proposed method can be used for applications (like for defense, and medical purposes etc) where exact retrieval of cover object at receiver side is required, due to use of reversible embedding approach. From experimental results it is observed that proposed technique achieves higher embedding capacity, acceptable value for visual quality and robustness against statistical and visual attacks.

Steganography, Data Security, Reversible Embedding, Interpolation

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