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\title{Digital Data Theft Detection using Watermarking}
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\begin{document}

             \author[1]{R.V Keshava  Rao}

             \affil[1]{  KL University,India.}

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\date{\small \em Received: 8 December 2013 Accepted: 4 January 2014 Published: 15 January 2014}

\maketitle


\begin{abstract}
        


Large amount of data is embedded in media and spread in the internet. This data can be replaced easily with the help of some software. Digital watermarking is a very useful technology in today?s world, to prevent illegal copying of data. Digital watermarking can be applied to all forms of multimedia.

\end{abstract}


\keywords{copyright protection, digital watermarking, steganography, information hiding, robustness.}

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\let\tabcellsep& 	 	 		 
\section[{Introduction}]{Introduction}\par
n computer science information hiding or hiding data in a message is the important principle of steganography.Information hiding is mainly divided into three categories Cryptography, Steganography, and Watermark. Cryptography is the process of converting comprehensible data into unintelligible data that can't be able understand by unauthorized people. The authorized user with the key can decrypt the ciphertext. As many modification were made in the field of multimedia and communications, now it became easy for the unauthorized users to decrypt a ciphertext into comprehensible data. Hence more complicated methods were developed to provide higher security than cryptography. These techniques are known as Steganography and Watermarking. Steganography is the time taking process. It hides data over a cover object in such a way that the sence of data is not detected by the hacker. Watermarking is related to the steganography. There is one main point in watermarking is that the invisible data is related to the cover object. Watermarking is mainly used for copyright protection, user authentication and security. Digital watermarking is the process of embedding a digital signal (audio, video or image) or hide a small digital data in comprehensible data which can not be easily removed is called digital watermarking. Digital watermarking is also called data hiding.\par
Author B Tech, Department of Electronics and Computer Engineering KL University,India. e-mail: keshav372@gmail.com ? Associate Professor, Department of Electronics and Computer Engineering KL University,India.\par
Watermarking block diagram watermarking system is divided into three types embedding \hyperref[b0]{[1]}, attack and detection. In embedding technique an algorithm accept user and data as input to be embedded and implement the watermark signal. Then watermark signal is send to another host. If this person makes any changes to the watermark signal is called an attacking. There are various types of attack is possible on the watermarked signal. Detection is an algorithm which takes attacked data as input and Extract the watermark data form the attacked data II. 
\section[{Types of Digital Watermaking}]{Types of Digital Watermaking}\par
Simple watermarked image Where O is the original image, W is the watermark information being embedded, U is the user's insertion key, and Erepresents the watermark insertion function.\par
Invisible Watermarking \hyperref[b0]{[1]} (Least significant bit watermarking)-Least significant bit watermarking is themost secured technique of watermarking. It also be applied to both visible and invisible watermarking. Spatial domain technique changes the pixels of one or two subset of the image. 
\section[{Let us see the one example on image watermarking process}]{Let us see the one example on image watermarking process}\par
Steps-1. For the image testing standard images A and B will be selected. The base image or original image is A for which watermaking is added .the watermarking image is B that will be added to the original image A.  
\section[{Requirements of Digital Watermarking}]{Requirements of Digital Watermarking}\par
The requirements of digital watermarking are A.\par
Transparency-making the watermark image clear and transparent without effecting the quality of original image . B. Robustness-This is one of the requirements of the watermarking .it means the watermark which is designed must be resistible to all kinds of attacks by the unauthorized users and hackers. C. Capacity-it describes the amount of data that can be embedded into multimedia formats such as image, audio, video or text for retrieving the prefect data of watermark during extraction.\par
IV. 
\section[{Conclusion}]{Conclusion}\par
In this paper we describes about different types of watermarking and its techniques. There are two types of digital watermarking techniques they are visible and invisible watermarking techniques. It provides authentication for owners. hence by using this watermaking techniques the data can be protected and stored from the unauthorized users. \begin{figure}[htbp]
\noindent\textbf{}\includegraphics[]{image-2.png}
\caption{\label{fig_0}}\end{figure}
 \begin{figure}[htbp]
\noindent\textbf{2}\includegraphics[]{image-3.png}
\caption{\label{fig_1}2 .}\end{figure}
 			\footnote{© 2014 Global Journals Inc. (US)} 			\footnote{© 2014 Global Journals Inc. (US) 2 Year 2014} 		 		\backmatter   			 
\subsection[{Acknowledgement}]{Acknowledgement}\par
We would like to give thanks toDr.R.Bullibabu for his guidance and help us to complete this paper. 			  			  				\begin{bibitemlist}{1}
\bibitem[Cox ()]{b0}\label{b0} 	 		\textit{},  		 			I J Cox 		.  	 	 		\textit{Digital Watermarking and Steganography}  		2008. Morgan Kaufmann.  	 	 (Second edition) 
\bibitem[Bender D. Gruhl et al.]{b1}\label{b1} 	 		‘Techniques for data hiding’.  		 			W Bender D. Gruhl 		,  		 			N Moromoto 		,  		 			A Lu 		.  	 	 		\textit{IBM Systems Journals}  		35  (3) .  	 
\end{bibitemlist}
 			 		 	 
\end{document}
