A Secure and authenticated discrete reversible data hiding in cipher images deals with security and authentication. This paper deals with the data hidden in an image carried out in two steps. First, a content owner encrypts the original uncompressed image using an encryption key. Secondly, 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 either data-hiding key or encryption key, he can extract the additional data and obtain an image with original data respectively or else he can extract any one data. This research tries to enumerate different encryption techniques and algorithms.
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Data hiding, Encryption , Compressible, Reversible.
