pyright protection for digital work [5]. Information Hiding is
a technique to embed digital data into a digital work
imperceptibly or in other words, without causing degradation to
the quality of that digital work [6]. The content owner can
embed a watermark representing copyright data of owner data,
and it is hardly removed during normal usage. These days there
are many companies who offer watermarking software for
digital protection, mostly for digital media. This software
embeds images with watermarks undetectable to naked eye,
visible only with special viewing tool. Besides this tool, some
companies also offer a service for notifying the owner
wherever and whenever it spots their copyrighted digital media
on World Wide Web. Here, the term of copyright data tracing
system is referring to this kind of service.