DATA HIDING TECHNIQUE USING RC4 ALGORITHM

DESIGN DETAILS
This Matlab design is based on transmitting redundant data over an insecure, bandwidth-constrained communications channel. The scheme is made up of image encryption, data embedding and data-extraction /image-recovery phases. The content owner encrypts the original uncompressed image using an encryption key to produce an encrypted image. Then, the data-hider compresses the least significant bits (LSB) of the encrypted image using a data-hiding key to create a sparse space to accommodate the additional data. At the receiver side, the data embedded in the created space can be easily retrieved from the encrypted image containing additional data according to the data-hiding key. Since the data embedding only affects the LSB, a decryption with the encryption key can result in an image like the original version. When using both encryption and data-hiding keys, the embedded additional data can be successfully extracted, and the original image can be perfectly recovered by exploiting the spatial correlation in natural image. The performance is evaluated based on PSNR.

REFERENCES
Reference Paper-1: Separable Reversible Data Hiding Using Rc4 Algorithm
Author’s Name: V. Suresh and C. Saraswathy
Source: IEEE
Year: 2013

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