Each file has a serial number embedded, together with denomination, currency, identifier of the issuing bank as well as layer of digital watermarks and digital signatures.
The campaign reached affluent travelers with multichannel efforts such as print ads with digital watermarks that brought consumers to mobile-optimized content and a branded storytelling smartphone app.
For marking media files with copyright information, a digital watermark has to be rather robust against modifications that can be applied to the carrier signal.
Like traditional watermarks, digital watermarks are only perceptible under certain conditions, i.e. after using some algorithm, and imperceptible anytime else.
