Date Added: Jun 2012
Digital watermarking of multimedia content has become a very active research area over the last several years. Digital watermarking is the process of embedding watermark into a digital signal. A digital watermark is a digital signal or pattern inserted into a digital document and carries information unique to the copyright owner, the creator of the document or the authorized consumer. This paper presents various watermark attack. Watermark attack is any processing (ability of unauthorized users) that may remove, detect and estimate, write or modify the raw watermarking bits (watermark).In this paper, the authors review watermarking applications areas such as ownership assertion, copy control, finger printing etc.