Information is hiding one of the most important fields of security, that became a human need due to several reasons: personal (e.g protecting special social information) or general reasons (e.g protecting agency or military information). Well cryptography obscures the meaning of the message but it does not conceal the fact that there is a message. The goal of cryptography is to make data unreadable by third party, whereas the goal of stenography is to hide data from third party. Security systems might build using many concepts like crypto and stego individually or a mix of both, but the big challenges is how to build information security system that can handle both crypto and stego criteria with the end user satisfactions in such a manner that will give high level of security.That is what will come to know through this book.