Two-Dimensional Code Using Invisible Ink for Forgery Prevention
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Solution Overview
Problem
Current two-dimensional code technologies face challenges in preventing forgery while maintaining low manufacturing costs and allowing for high-speed generation and recognition, particularly when used for card identification, as they often require advanced cameras or complex patterns that increase costs and reduce readability.
Innovation Solution
A two-dimensional code generation method that encodes data as a two-dimensional image using a binary data string in a Fibonacci representation, with points and lines forming a melon-like pattern, making it difficult to forge and allowing for low-cost printing and high-speed recognition using standard cameras.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If advanced forgery prevention technology is introduced in the card, then forgery resistance is improved, but manufacturing cost increases
Solution Approach 1:
The patent uses invisible ink that absorbs infrared rays to print the two-dimensional code on the card. This color change approach (using different spectral properties) provides forgery resistance because the code cannot be seen or copied with ordinary visible light, yet can be read by infrared-capable cameras, thus preventing forgery without requiring complex manufacturing processes
Solution Approach 2:
The patent creates a two-dimensional code with a melon-like pattern that is difficult to replicate. The complex organic pattern combined with invisible ink makes copying extremely difficult for forgers, while the code can be accurately reproduced through standard printing processes for legitimate manufacturing
2Reliability
If a minute pattern is printed on the card for forgery prevention, then forgery resistance is improved, but reading speed decreases due to requirement of high-performance camera
Solution Approach 1:
The patent transitions from one-dimensional barcodes to a two-dimensional code with a melon-like pattern. This dimensional change allows the code to encode more information in a compact space while maintaining readability with standard cameras, as the two-dimensional structure provides redundant pathways for data retrieval that work well with conventional imaging devices
3Ease of manufacture
If conventional two-dimensional code is used, then manufacturing cost is reduced, but forgery resistance decreases
Solution Approach 1:
The patent combines standard printing technology (for cost-effectiveness) with invisible ink having specific infrared absorption properties (for security). This composite approach uses the affordable two-dimensional code structure plus the security-enhancing invisible ink material, achieving both low manufacturing cost and high forgery resistance through the combination of ordinary and specialized elements
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 method effectively prevents forgery and allows for efficient, low-cost generation and recognition of two-dimensional codes, utilizing standard cameras and maintaining high security levels by embedding significant information in a two-dimensional plane that cannot be easily rearranged linearly.
Implementation Method 1
an invisible ink which absorbs infrared rays and the like
Data Source
AI summary
A two-dimensional code in which given data is encoded as a two-dimensional image. The two-dimensional code includes as image elements: points each of which is placed at point placement reserved position in a two-dimensional region based on a binary data string uniquely associated with the given data according to a preset binary data string placement condition; and a line connecting each of the points and a connection target point according to a preset connection condition. The two-dimcnsional code is formed as a two-dimensional image by causing the line connecting the points to have a given width.