IEEE 2012 TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY
Technology - Available in DotNet / J2EE
Abstract— This work proposes a novel scheme for
separable reversible data hiding in encrypted images. In the first phase,
a content owner encrypts the original uncompressed image using an
encryption key. 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, he can extract the
additional data though he does not know the image content. If the receiver
has the encryption key, he 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, he
can extract the additional data and recover the original content without
any error by exploiting the spatial correlation in natural image when the
amount of additional data is not too large.
