Molecular Layer Security Feature for Document Authentication
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Solution Overview
Problem
Creating a security feature for documents that is easily authenticatable yet difficult to counterfeit is challenging, as existing solutions fail to provide a unique and efficient method for attachment to identification documents or banknotes.
Innovation Solution
A security feature comprising a carrier layer and a molecular layer that can be excited by a stimulation field, with the change in excitation state determining a unique characteristic property, forming a physically unclonable function (PUF), which is difficult to copy or counterfeit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a security feature is designed to be easily authenticatable, then authentication efficiency is improved, but it becomes easier to counterfeit
Solution Approach 1:
The patent applies parameter changes by utilizing the excitation state of molecules in the molecular layer as a variable parameter. The security feature responds to stimulation fields by changing molecular excitation states, which alters characteristic properties such as optical or electrical characteristics. This dynamic parameter change enables efficient authentication through measurable responses while maintaining counterfeit resistance because the specific excitation behavior is determined by the unique molecular composition and arrangement that is difficult to replicate.
2Reliability
If a security feature uses complex molecular structures to prevent counterfeiting, then counterfeit resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent employs thin films by using a molecular layer deposited on a carrier layer. This thin film structure provides the necessary molecular complexity for secure authentication while maintaining manufacturability through established thin film deposition techniques. The molecular layer's thin nature allows for precise control of molecular arrangement and composition, enabling unique characteristic properties without requiring complex bulk structures, thus balancing security with manufacturing feasibility.
3Reliability
If a security feature is made unique and unclonable, then counterfeit resistance is improved, but ease of authentication may be reduced
Solution Approach 1:
The patent substitutes mechanical or physical inspection methods with field-based interaction. Instead of requiring physical examination of complex security features, the authentication process uses stimulation fields (electromagnetic, optical, or other energy fields) to excite the molecular layer and detect characteristic responses. This substitution maintains unclonability through unique molecular configurations while simplifying authentication to a non-contact or minimal-contact measurement process, thereby preserving both security and ease of use.
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 solution enables the creation of a security feature with a unique characteristic that is efficiently authenticatable and difficult to duplicate, suitable for documents and objects, providing a robust authentication mechanism.
Implementation Method 1
the molecular layer can be put into an excited state by a stimulation field
Data Source
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AI summary
The invention relates to a security feature (100) for a document (300), comprising a carrier layer (101) and a molecular layer (103) arranged on the carrier layer (101), wherein the molecular layer (103) can be put into an excitation state by means of a stimulation field, and wherein a characteristic property of the security feature (100) is determined by the change of the excitation state in response to a change of the stimulation field.