Watermarking
Watermarking is a similar process to the steganography , which is used for the protection of the documents by keeping a copyright of the owner. Its primary goal is not to be destroyed or extracted Watermarking is generally used with multimedia files to protect the intellectual property rights . watermarks are also used with documents which are visible watermarks . It may be used to make information temper proof by using as fingerprint to the information for detection of changes
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