Entrenched Visual Cryptography using Secret Sharing Scheme with public Key

摘要

Visual cryptography sch eme (VCS) is a cryptographytechnique which allowvisual data i.e.: printed text, handwritten notes, and picture isencrypted in such a way thatthe decryption can be doneby the human visual system, without the supportof computers. In order to sh are undisclosed images, VCS used as a secret sharing schema.The idea isto convert the written stuffin to a cipher textby using ElGamal Algorithm and then place that cipher textin to an image and encode this image in to n shadow images. The decod ing requ ires only selecting some splitsof these n images, creationtransparencies of them, and stacking them on top of othertransparencies