Essay --

As can be seen in fig.1, the VCS system converts given IMGE into random considers. To the naked eye, the random shares do non providing meaning. The VCS system has many applications in the real world. They include transmission of army orders securely, authentication and authorization, transmitting passwords and so on. The researchers worldwide focused in somatic properties like color, pixel expansion etc. The proposed construction of VCS based on threshold for levels of whiteness color VCS was considered in colored VCS. Other final cause is proposed which allows sharing of multiple secret ambits.Naor et al. introduced EVCS (Extended Visual Cryptography Scheme) with a simplex example. This paper 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 sh ares are purposeful images. EVCS is something similar to stereography where covering shares are m...