Watermark system

Système de filigrane



A method for altering an electronic representation of an item having a watermark comprises: receiving an electronic representation of an item (200), the electronic representation comprising a first watermark, the first watermark corresponding to a first watermark definition; receiving a signal (210) indicating that a second watermark definition is to be used; and altering (220) the electronic representation to comprise a second watermark corresponding to the second watermark definition.




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