Patent
Protected document bearing watermark and method of making
TLDR
In this paper, the method of making the document comprising preprinting a "VOID" or other warning or cancellation phrase pattern in half tone or multitone on the document and camouflaging this pattern is also disclosed The document bears a watermark which adds to the security of the systemAbstract:
Disclosed is a protected document such as a negotiable instrument, a title instrument, identification document or other documents which should be kept secure from illegal copying by color copiers The method of making the document comprising preprinting a "VOID" or other warning or cancellation phrase pattern in half tone or multitone on the document and camouflaging this pattern is also disclosed The document bears a watermark which adds to the security of the systemread more
Citations
More filters
Journal ArticleDOI
Multimedia data-embedding and watermarking technologies
TL;DR: The reliability of data-embedding procedures and their ability to deliver new services such as viewing a movie in a given rated version from a single multicast stream are discussed.
Patent
System for electronically printing plural-color tamper-resistant documents
TL;DR: In this paper, a system for printing security documents which have copy detection or tamper resistance in plural colors with a single pass electronic printer printing an integrated image controlled by an image generation system which electronically generates a safety background image pattern with first and second interposed color patterns which is electronically merged with alphanumeric information and a protected signature into an integrated electronic image for the printer.
Patent
Non-continuous holograms, methods of making them and articles incorporating them
TL;DR: In this paper, a reflective discontinuous hologram is formed in a pattern that both permits viewing the protected information through it and the viewing of an authenticating image or other light pattern reconstructed from it in reflection.
Patent
Methods and systems using multiple watermarks
TL;DR: In this paper, two or more digital watermarks with different characteristics are embedded in a document and the characteristics are chosen so that the watermarks will be affected in different manners if the document is subsequently copied or reproduced.
Patent
Holograms with discontinuous metallization including alpha-numeric shapes
TL;DR: In this article, the same master hologram or diffraction grating is made into distinct authentication devices by forming replicas thereof that have different patterns of reflective material which form distinct indicia, such as a different alpha-numeric character.
References
More filters
Patent
Security document system and method
TL;DR: In this article, a combination of ink and background was used to produce a light-reflective print of a classified or copyrighted indicia by a variety of convenience office copiers operating in different energy ranges.
Patent
Non-copying printed document and method of printing same
TL;DR: A document with a background printed thereon which includes a first portion consisting of small dots and a second portion formed of larger dots is described in this paper, where only the larger dots reproduce so that the copy is readily distinguishable from the original.