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Yellow dots on white paper, produced by color laser printer (enlarged, dot diameter about 0.1 mm) Printer tracking dots, also known as printer steganography, DocuColor tracking dots, yellow dots, secret dots, or a machine identification code (MIC), is a digital watermark which many color laser printers and photocopiers produce on every printed page that identifies the specific device that was ...
A copy detection pattern (CDP) [1] or graphical code [2] [3] is a small random or pseudo-random digital image which is printed on documents, labels or products for counterfeit detection. Authentication is made by scanning the printed CDP using an image scanner or mobile phone camera . [ 4 ]
Security printing is the field of the printing industry that deals with the printing of items such as banknotes, cheques, passports, tamper-evident labels, security tapes, product authentication, stock certificates, postage stamps, and identity cards. The main goal of security printing is to prevent forgery, tampering, or counterfeiting.
The printers use a 40-micron nozzle that outputs more than 100,000 drops per second of ink. While these printers make microprinting faster and easier to produce digitally, they still have not reached the true sub-pixel size of less than 1 point. [11] The smallest scale microtext a laser printer can produce is 0.5 pt. [12]
Printer steganography, used by some colour laser printers to add hidden encoded information to printouts; Coded anti-piracy, an anti–copyright-infringement technology which marks each film print of a motion picture with distinguishing patterns of dots, used as a forensic identifier to identify the source of illegal copies
A counterfeit Series 1974 one-hundred-dollar bill on display at the British Museum. After being detected, the bill was overprinted with a rubber stamp to indicate that it is a fake. A superdollar (also known as a superbill or supernote ) is a very high quality counterfeit United States one hundred-dollar bill , [ 1 ] alleged by the U.S ...