Information hiding is an area of great interest due to its applications in copyright protection of images, data, passport control, CDs, DVDs, videos and so on. This book presents a sample of recent research results from key researchers. The contributions include: – Copyright protection system; – Video watermarking; – Restoring objects for digital inpainting; – Data embedding scheme; – Robust image watermarking; – Perceptual shaping in digital watermarking; – Image authentication method under JPEG; – Fingerprinting for copyright protection; – Data hiding for halftone images; – Information hiding for digital watermarking.This book is directed to the application engineers, researchers, graduate students, professors and to those who are interested to investigate the information hiding techniques and use them in various applications such as copyright protection of images, data, passport control, CDs, DVDs, videos and so on.