Unique LSB Compression Data Hiding Method
Ashwini Jarali1, Jyoti Rao2

1Ms.Ashwini Jarali, Department of Computer Engineering/University of Pune, India.
2Ms.Jyoti Rao Department of Computer Engineering/ University of Pune, India
Manuscript received on January 12 2013. | Revised Manuscript Received on January 15 2013. | Manuscript published on January 25, 2013. | PP: 17-21 | Volume-1, Issue-3, January 2013. | Retrieval Number: C0129011313/2013©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: This paper presents a unique method of reversible data hiding separately in encrypted image..This work presents a new method that combines image cryptography, data hiding and LSB compressing technique for reversible data hiding separately. In this method we encrypt the original image with stream cipher algorithm. Then, a data-hider may compress the least significant bits of the encrypted image using a data-hiding key to create a sparse space to accommodate some additional data. With an encrypted image containing additional data, if a receiver has the data-hiding key, she can extract the additional data though she does not know the image content. If the receiver has the encryption key, she can decrypt the received data to obtain an image similar to the original one, but cannot extract the additional data. If the receiver has both the data-hiding key and the encryption key she can extract the additional data and recover the original content without any error by exploiting the spatial correlation in natural image.
Keywords: LSB compressing, reversible data hiding, Image encryption, data embedding, Pixel Permutation.