This book provides technical information on multimedia security and steganography as well as the fundamental theoretical framework for developing extensive advanced techniques. By understanding essential principles of multimedia security and steganographic systems, readers can develop novel ideas in implementing advanced algorithms. Topics include automatic detection and removal of visible image watermarks, digital watermarking based on chaotic map and reference register, digital steganographic schemes based on image vector quantization, image inpainting using an enhanced exemplar-based algorithm, and behavior modeling of human objects in multimedia content.