This book focuses on the visual cryptographic technique for encrypting of medical images before transmission or storage of them, This will make such images inaccessible by unauthorized personnel and also ensures confidentiality, The process made use of an encryption technique that is based on pixel shuffling and a secret key generated from the image. In this book, we are going to show how to split a secret image into three shares. All shares parts are necessary to reconstruct and reveal the secret, and the possession of either one, alone, is useless in determining the secret.