Secret Image sharing by use of Chaos based Visual Cryptography

Abstract

Information security has become one of the main factors in the field of information technology and communication. The need for information security has increased because of the dependency of individuals and organization on computer has increased.  Users highly pay attention on the security of their private information. Cryptography is the science and study of secret writing for achieving security by encoding message to make them non- readable, it is used for secure communication over an insecure communication channel. Visual cryptography is one of the branches of cryptography in which the plain text is divided into shares and at the receiving end we visually identify the original plain text by stacking those shares. Visual Cryptography is used by various critical security issues like identifying the difference between human and machine, scanning, printing, captcha, protecting the biometric data such as Fingerprint images, iris codes and face image.

 In the current scenario electronic communication is increased and its usage in E-business has also increased.  To keep the information secure we use chaos based visual cryptography, which is the combination of chaos based image encryption and secret image sharing using visual cryptography. So that the useful information or secret information should be protected in a high security level. Using chaotic map we generate chaotic sequence or chaotic stream which are dynamic in nature and by using those sequence we apply visual cryptography for secret image sharing. The whole process is known as chaos based secret image sharing scheme.