Digital watermarking based on chaotic map and reference register

Since multimedia technologies have been becoming increasingly sophisticated in the rapidly growing Internet applications, data security, including copyright protection and data integrity detection, has raised tremendous concerns. One solution to achieve data security is the digital watermarking technology that embeds hidden information or secret data in a host image (Berghel and O’Gorman, 1996; Eggers and Girod, 2002; Wu, 2005). It serves as a suitable tool to identify the source, creator, owner, distributor, or authorized consumer of a document or an image. It can also be used to detect whether a document or an image is illegally distributed or modified.