Embedded Watermarks Using Metal Particle Mixtures
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Solution Overview
Problem
Existing watermarks, both superficial and embedded, are vulnerable to forgery and reproduction due to ease of discovery and manufacturing, leading to authenticity issues in certification and identification processes.
Innovation Solution
Combining a superficial watermark with an embedded watermark, utilizing metal-containing mixtures with identifiable properties, such as varying concentrations of metal particles, to create a unique X-ray signature that is difficult to reproduce, and applying these mixtures semi-randomly within articles to enhance uniqueness and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a superficial watermark is used for identification, then the identification process is simple and quick, but the watermark is vulnerable to forgery and reproduction
Solution Approach 1:
The patent combines a superficial watermark with an embedded watermark containing metal particles. The superficial watermark provides quick visual identification, while the embedded watermark with unique metal particle composition and distribution provides secure authentication that is difficult to forge. This merging of two watermarking approaches resolves the contradiction between ease of identification and reliability of authentication.
2Reliability
If an embedded watermark with metal particles is used, then the authentication security is enhanced, but the manufacturing complexity increases
Solution Approach 1:
The patent varies parameters of the metal particle mixture including composition, concentration, and spatial distribution to create unique watermarks for different articles. By changing these parameters, each article receives a distinct embedded watermark that enhances authentication security. The manufacturing process uses controlled application methods to achieve precise parameter variation without excessive complexity.
Solution Approach 2:
The embedded watermark uses composite material consisting of metal particles distributed within a matrix material. This composite structure provides both the security enhancement from unique metal signatures and a practical manufacturing approach where the mixture can be applied as a coating or impregnated into the article substrate.
3Adaptability or versatility
If metal-containing mixtures with varying concentrations are applied semi-randomly, then the uniqueness of each watermark is maximized, but the manufacturing precision requirements increase
Solution Approach 1:
The patent prepares metal-containing mixtures with predetermined compositions and concentrations before application. These pre-formulated mixtures ensure consistent and controlled application characteristics. By preparing the mixtures in advance with known properties, the system achieves both uniqueness through varied compositions and manufacturing precision through controlled application processes.
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 combination of superficial and embedded watermarks with unique metal signatures increases the difficulty of forgery and reproduction, providing a robust authentication and identification system that is less likely to be accurately replicated, thus enhancing the security and uniqueness of article identification.
Implementation Method 1
The embedded watermark may be viewed by an X-ray camera
Data Source
AI summary
An article comprises a superficial watermark located on a first surface. The article also comprises an embedded watermark that is embedded within the article. The embedded watermark may be viewed by an X-ray camera. A method comprises applying a metal-containing mixture to an inner layer of an article, resulting in an embedded watermark within the article. The method also comprises analyzing the properties of metal particles within the mixture. The method also comprises recording the first property.