Essay --

As butt end be seen in fig.1, the VCS arranging converts given IMGE into random shares. To the naked eye, the random shares do not providing meaning. The VCS frame has many applications in the real world. They include transmission of military orders securely, trademark and authorization, transmitting passwords and so on. The researchers worldwide focused in physical properties equivalent color, pixel expansion etc. The proposed construction of VCS based on verge for levels of whiteness color VCS was considered in colored VCS. Other scheme is proposed which allows share of multiple secret images.Naor et al. introduced EVCS (Extended Visual Cryptography Scheme) with a simple example. This melodic theme proposes EVCS corresponding to VCS. The EVCS takes a secret image and the original share images as input and generates shares that can satisfy the criteria given below.Secret image can be recovered from any subset of shares.Forbidden shares cant be used to obtain secret image.All the shares are meaningful images. EVCS is something like to stereography where covering shares are m...