Visual Cryptography Scheme With Mask Image Based On The Technology Of Flip

Information security has always been the focus of attention,secret sharing technology is a kind of important ideas of solving the information security.Secret sharing ideas share the secret information into several portions in the proper way.Each of the participants hold a share.Individual participants are unable to get secret information.To recover the secret information needs multiple participants participate in.Visual cryptography is a branch of the secret sharing technology,its advantage lies in decryption person does not need knowledge of cryptography,only need to user visual system.Decryption method is very simple.Visual cryptography inherit the secret sharing idea and also easy to restore the secret.The application prospect of visual cryptography is very broad,which cause the research interest of scholars.This paper proposed a visual cryptography scheme based on the technology of flip with disguised image.The main contribution lies in 1 to achieve two secret image sharing through the flip technology.2 to disguise share images,to improve the security of share.The main idea of scheme is: in the process of encryption,the secret image symmetrical about horizontal center line of a pair of pixels is encrypted,at the same time,according to the mask image pixel color to pretend to share images,make share image has certain significance,reduce the possibility of attack on shares;In the process of decryption,the superposition of two share images directly can restore one of the secret images.To flip one share upside down and overlay with another share,the second secret image can be restored.In this paper,the third chapter discusses in detail the scheme of sharing method.The share scheme is given,which has all 64 groups sharing scheme based on the color of mask images.The fourth chapter verifies this solution in Matlab 7.0 software.The feasibility of the scheme is confirmed through two experiments.