This is a penultimate draft of our soon to appear textbook. For more information, visit http://www.mhhe.com/dasgupta.

rogue-like dungeon generation

Visual Cryptography uses two transparent images. One image contains random pixels and the other image contains the secret information. It is impossible to retrieve the secret information from one of the images. Both transparent images or layers are required to reveal the information. The easiest way to implement Visual Cryptography is to print the two layers onto a transparent sheet.