A Survey on Embedded Halftoned Shares in Extended Visual Cryptography Schemes

With the rapid advancement of network technology, multimedia information is transmitted over the Internet conveniently. Various confidential data such as military maps and commercial identifications are transmitted over the Internet. While using secret images, security issues should be taken into consideration because hackers may utilize weak link over communication network to steal information that they want. To deal with the security problems of secret images, various image secret sharing schemes have been developed. Visual cryptography was introduced in 1994 Noar and Shamir [1]. With the rapid development of the network technology, multimedia information is transmitted over the Internet conveniently. While using secret images, security issues should be taken into consideration because hackers may utilize weak link over communication network to steal information that they want. To deal with the security problems of multimedia images, various image secret sharing schemes have been developed. In this paper, we have proposed a technique of well known secret sharing on both black and white and color images.