Digital Watermarking for PDF and PostScript Documents

This book introduces background for digital watermarking, the format of the PDF file, and the PostScript language file format. The aim of this book is to develop and implement digital watermarking system to maintain PDF and PostScript files copyright that have (.pdf and .ps) extension by using three methods, these methods are unused spaces in PDF file watermarking method, hiding watermark using text to image method, and insert image watermarking method.