Image Encryption for Separable Reversible Data Hiding

S. Lavanya, Dr.S.Palaniswami, s.Rijutha


Separable reversible data hiding is a new methodology used for security and authentication in images. A technique that has been implemented in order to combine image cryptography, data hiding and LSB compression. In the first phase, a content owner encrypts the actual uncompressed image using a stream cipher algorithm. Then, a data hider may compress the least significant bits of the enciphered image using a data hiding key to create a sparse space to accommodate some additional data. With an enciphered image containing concealing data, if the receiver has the data hiding key, can extract the concealing data even though the receiver does not know the image. If the receiver has the encryption key, can change the enciphered image in to an understandable format in order to obtain an image similar to the actual one, but cannot extract the concealing data. If the receiver has both the data hiding key and the encryption key, can extract the concealing data and recover the actual content without any error by exploiting the spatial correlation in natural image when the amount of additional data is not too large.


Index Terms—LSB compression, reversible data hiding, stream cipher, image cryptography, data hiding.

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