01401nas a2200217   4500000000100000000000100001008004100002260000900043653001600052653001700068653002400085653001700109100001400126700001400140700001400154700001500168245008600183300001000269490000700279520089700286       2011                            d  c201110aCopy attack10acryptography10aVisibility function10aWatermarking1 aAjay Goel1 aO .P.Sahu1 aAman Soni1 aPunit Soni00aA Copy Attack on Robust Digital Watermarking in Multi Domain for the Stego Images  a27-330 v263 a<p>Watermarking is a potential method for protection of ownership rights on digital audio, image and video data. In watermarking terminology, an attack is any processing that may impair detection of the watermark or communication of the information conveyed by the watermark. The processed, watermarked data is then called attacked data. An attack succeeds in defeating a watermarking scheme if it impairs the watermark beyond acceptable limits while maintaining the perceptual quality of the attacked data. In this paper we present a number of attacks that enable the information hidden by them to be removed or otherwise rendered unusable. The latest attacks do not destroy an embedded watermark, but copies it from one image to a different image. Finally, we summarise the current work of the attacks in watermarking and focus on the copy attack on robust digital watermarking schemes.</p>