LAUSR

This paper proposes an efficient (k, n)-Hybrid image sharing scheme (HISS) using non-recursive hash key based stream cipher. The sequence generated using non-linear based boolean function is used to construct the Toeplitz matrix to generate the non-recursive hash key. Further, the algorithm is proposed to generate the non-recursive hash key based stream cipher i.e., determined by the Toeplitz matrix and the public-key. Hence, the generated dynamic key stream and basic matrices corresponding to white and black pixels, which are used to construct a Hybrid image sharing scheme without any distortion in the reconstructed image. The generated dynamic key stream is validated for correlation analysis, avalanche effect in terms of the Number of Bit Change Rate (NBCR) and by randomness test using NIST statistical test suit. The proposed Hybrid image sharing scheme is analyzed through correlation coefficients in horizontal, vertical and diagonal direction with entropy analysis, and pixel similarity analysis in terms of Number of Pixels Change Rate (NPCR).