Opaque Substrate Microchannels for Tamper-Resistant Information Storage
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Solution Overview
Problem
Existing security documents face challenges in protecting information from manipulation and forgery, as perforation patterns can be easily altered by adding or changing holes, making it difficult to ensure the information remains intact and verifiable without significant effort.
Innovation Solution
The method involves encoding information as light beam directions within transparent channels formed in an opaque substrate, where each channel is designed to favor light propagation along specific directions, allowing for reliable verification through imaging optics without directly representing the information on the surface, thus making manipulation more difficult.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If perforation patterns are used to store information in security documents, then information can be visually verified, but the information can be easily manipulated by adding or changing holes
Solution Approach 1:
The patent transitions from two-dimensional surface perforations to three-dimensional microchannels embedded within the substrate. This dimensional change stores information in the depth of the substrate rather than on the surface, making manipulation significantly more difficult while maintaining visual verifiability through optical imaging.
Solution Approach 2:
The patent introduces an optical imaging system as an intermediary between the microchannels and the observer. Instead of directly viewing the microchannels, information is projected onto a screen or displayed through the substrate using optical principles, creating a verification layer that protects the actual information storage mechanism.
2Reliability
If microchannels are introduced at different angles to the surface, then viewing directions are diversified for security, but additional manipulation becomes possible by adding microperforations at specific inclinations
Solution Approach 1:
The patent changes the parameters of the microchannels by embedding them at specific three-dimensional coordinates and orientations within the substrate. Rather than simple surface holes, the microchannels have controlled depth, diameter, and angular orientation, creating a complex spatial configuration that is difficult to replicate or manipulate.
3Ease of operation
If information is directly represented on the surface through perforation patterns, then verification is simple, but the information can be significantly changed by modifying individual holes
Solution Approach 1:
The patent uses optical imaging as an intermediary layer between the microchannel information storage and the verification process. The microchannels themselves are not directly viewed; instead, their spatial configuration is optically projected onto a screen or displayed through the substrate, creating a separate verification interface that protects the actual information storage structure.
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
This approach enhances security by making it harder to manipulate the information stored in the substrate, as additional channels require knowledge of the imaging geometry and specific orientations, ensuring that the information can be reliably verified without extensive effort.
Implementation Method 1
each of the channels favoring a passage of light along a space vector assigned to the respective channel
Data Source
Figure 1~1a
Figure 2
Figure 3~4
AI summary
The invention relates to a method for producing a security element (20), in particular for a security document (30), and to such a security element (30), which is obtained by carrying out the following method steps: providing a substrate (1) which is opaque to light at least in one continuous three-dimensional zone; providing information to be stored in the form of a set of orientations (directional vectors (3.1 to 3.n)); storing the information in the substrate (1) by forming transparent channels within the opaque three-dimensional zone in the opaque substrate such that at least one, preferably a plurality, of the transparent channels (2.1 to 2.n) is/are associated with each of the orientations (each of the directional vectors (3.1 to 3.n)), wherein each of the channels (2.1 to 2.n) facilitates the travel of light along one directional vector (4.1 to 4.n) associated with the respective channel, preferably allows light to travel exclusively along the directional vector (4.1 to 4.n) associated with the respective channel and running collinear to the orientation (the directional vector (3.1 to 3.n)) with which the respective transparent channel (2.1 to 2.n) is associated.