Watermark

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Watermark

An image in a piece of paper that may be seen more clearly when it is held up to light. This is used in printing some money and passports to prevent counterfeiting. For example, if one holds a $20 American bill up to light, one would see a watermark of Andrew Jackson's face.
References in periodicals archive ?
Digital watermarks are in extensive use around the world, with billions of digitally watermarked objects in use for broadcast monitoring and copy protection.
The entertainment industry has been using digital watermarks to serialize digital content, such as downloaded MP3 music tracks, the Academy Award screeners, pre-release music copies and digital cinema theatrical showings, in a number of markets already.
Together, digital watermarks and laser perforation raise the bar against driver license counterfeiting, alteration and photo swapping, providing Utah's citizens with a much higher level of security than prior licenses and preparing the State to meet anticipated federal ID security standards.
Published by the DWA, the white paper outlines how content owners can embed digital watermarks as content identifiers and digital media serial numbers into entertainment content to communicate the identity of copyrighted works.
Advanced driver license design and security features, including Digimarc(R) IDMarc(TM) digital watermarking -- making Ghana the first African driver license issuer to adopt machine-readable digital watermarks for post-issuance ID authentication.