ABSTRACT
The basic principle of the Visual Cryptography Scheme (VCS) was first formally introduced by Naor and Shamir [10]. The idea of the VCS proposed in [10] is to split an image into two random shares (printed on transparencies), which separately reveal no information about the original secret image other than the size of the secret image. The image is composed of black and white pixels. The original image can be recovered by stacking the two transparencies together.
