Date Added: Nov 2011
With the rapid development of the internet technologies, digital media needs to be transmitted conveniently over the network. Attacks, unauthorized access of the information over the network become greater issues now a day. Information Hiding provides solution to these issues. In this paper, the authors studied the various existing information hiding techniques like steganography, watermarking etc. An overview of steganalysis attack is also presented in this paper. Steganography tools used for the purpose of information hiding are also discussed.