Laser Marking for Secure Document Authentication
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Solution Overview
Problem
Current methods for securing identity documents, such as passports and identity cards, fail to easily control the authenticity of personalized images and alphanumeric data, as they rely on expensive authentication devices and are not effective against counterfeiting with advanced equipment.
Innovation Solution
Incorporating a laser marking process that uses colored laser points generated by specific reactions between laser wavelengths and pigments in the document's guilloche patterns and personalized image, allowing for easy visual verification of authenticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard guilloches are inserted across the document surface to protect alphanumeric data, then detection of data falsification is improved, but the method does not detect sophisticated document forgery
Solution Approach 1:
The patent applies color changes by using a color laser marking process that creates a variable color pattern on the personalized area. The laser marking interacts with the pigments in the guilloches and personalized image to produce colors that are directly dependent on the pigments used, creating a unique color signature that is difficult to replicate with sophisticated equipment.
2Reliability
If variable guilloches are used to encode alphanumeric data, then data protection is improved, but authentication requires expensive devices and trained personnel
Solution Approach 1:
The patent creates a visual copy of the authentication information through the color laser marking pattern. Instead of requiring complex decoding devices to read encoded data from variable guilloches, the laser marking produces a visible color pattern that can be easily copied and verified by visual inspection, eliminating the need for expensive authentication devices.
3Reliability
If guilloches and personalized image are secured using existing methods, then security is improved, but easy verification of authenticity cannot be achieved
Solution Approach 1:
The color laser marking creates a variable color pattern that changes based on the pigments present in the guilloches and personalized image. This color-changing characteristic provides easy visual verification of authenticity, as the color pattern can be directly observed and compared against expected characteristics without requiring complex authentication equipment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The laser marking process enables straightforward authentication by creating a variable color pattern that connects the personalized image to its environment, making it easy to detect any alterations or counterfeiting attempts.
Implementation Method 1
a color laser marking whose colors are directly dependent on the pigments used in the guilloches and the personalized image
Implementation Method 2
The first insertion process is a laser-reactive printing process
Data Source
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AI summary
The invention relates to a method for securing a customized area (120) of a security document (100), comprising the following steps: - inserting, by a first insertion method, a customized color image (122) on a first surface (121, 123) of the security document; - inserting, by a second insertion method, guilloche patterns (124, 126) in color on a second surface (121, 123, 125) of the security document, wherein the first and second surfaces are stacked on top of each other such that the guilloche patterns and the customized image at least partially overlap; and - inserting a colored marking (160) on the customized image and the guilloche patterns by at least two laser beams of different wavelengths, wherein the colored marking passes at least partially through the customized image and the guilloche patterns, and wherein, for the purpose of the colored marking, said wavelengths allow to generate colors obtained by chemical reaction with the pigments of the customized image and the guilloches such that the colors of the colored marking directly depend on the pigments used in the guilloches and the customized image.