Abstract
AbstractThis paper contains a brief description of new approach regarding LSB steganography. The novelty of the method resides in the combination of LSB (Least Significant Bits) steganography with some primitives of the pixel-sieve/bit-sieve cryptographic method. In short, we propose to use two or more carrier images and the sieving algorithm, borrowed from the pixel sieve primitive, to determine which carrier image will receive the next set of bits of the secret message. While in classic LSB steganography the secret message must be encrypted prior to embed the information into the carrier image, in our proposal the message is scrambled between the shares in a pseudo random way. An attacker will need all the carrier images and the sieving key in order to reconstruct the original message. Also we recommend an alternative method in which instead of simply replacing the last bit/bits we use them as XOR keys to further enhance the security.
 Keywords: steganography, cryptography, secret sharing; visual cryptography, LSB.
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