A Novel Scheme of Visual Secret Sharing using Privilege Assigned Shares

Various existing Visual Cryptographic Schemes which makes use of traditional concepts of visual cryptography ensures that every share holds the same capability when are superimposed to recover the secret image. It means that at the sender’s side there is no possibility of assigning capabilities or privileges to the shares according to their importance. The solution to the above problem is assigning a suitable capability to each share to recover the secret image. In this privilege based study, we proposed a novel scheme for secret sharing i.e "The privilege based Visual Secret Sharing scheme", where each share will hold the different recovering capability or privilege. It is considered that the shares which are assigned higher privileges will have more capability for recovering the secret image. This scheme holds the following pros: (1) Each share will hold an appropriate capability that will contribute to recover the original secret image. (2) The final recovered image will have better contrast as compared to the recovered image using the traditional Visual Cryptographic schemes. (3) The size of the secret image and the generated share will be same.