A novel non-expansion visual secret sharing scheme for binary image

In visual cryptography, the secret can be any written text, graphical representation, or picture. This technique, some time called visual secret sharing (VSS), allows visual information to be encrypted in such a way that the decryption can be performed by the human visual system. In this paper, a novel approach to VSS based on the use of pseudo random number generator (PRNG) that has very long periods to ensure unrepeated pattern in addition to its effective approach. It is a secure approach to prevent the secret image from being stolen, lost or corrupted. In comparison with other image secret sharing methods the main advantage of this approach are its strong protection of the secret image and effective mechanism for secret image sharing that is not found in existing secret image sharing methods. Experimental results proved the feasibility of the proposed approach are also included.