Author : Vibhor Saxena,prof. Kailash Patidar [ Volume No.:V, Issue No.V-SEP 2016] [Page No : 655-659] [2016]

Image cryptography plays an important role in data security. Visual cryptography is a method which is used to encrypt information in any format like text, image, led display such that decryption is done by human eye. It does not require any key for decryption so security during image transformation is always desirable but challenging task. Rapid growth in the techniques for doing so is also increasing. Internet has become most commonly used media for communication and hence text, voice, video, Images and many more are transmitted through Internet. These might include Military Secrets, Commercial Secrets and Information of individuals and therefore it has to be transmitted by safer means with enhanced security. In the process of Visual Cryptography a secret image is encrypted into shares which refuse to divulge information about the original secret image. Various researchers are working on improvement of security features in image transaction. In this review paper we are presenting analysis of various visual cryptography methods for and security enhancement techniques during image transactions.