Quasi-crystalline Tiling for Document Authentication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current security elements for documents lack effective machine-readable features to reliably detect tampering attempts, which can be visually evident but escape automated inspection.
Innovation Solution
Incorporating a 2-dimensional non-periodic, quasi-crystalline tiling into security elements, such as inks or coatings, that provide both overt and covert security features, including UV-, visible-, and IR-absorbing or luminescent materials, and ferromagnetic components, allowing for machine authentication through discrete Fourier Transform analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If visual inspection methods are used to detect tampering, then human operators can identify obvious tampering attempts, but machine automation capability is lost
Solution Approach 1:
The patent applies optically variable pigments and luminescent compounds that change appearance under different lighting conditions (UV, visible, IR). These materials provide overt visual features for human inspection and covert features detectable by machines, resolving the contradiction between automation and reliability.
Solution Approach 2:
The security element combines multiple materials with different optical and magnetic properties (luminescent compounds, IR-absorbing materials, ferromagnetic particles) into a composite structure. This composite approach enables both visual inspection and machine automation while maintaining high reliability for tampering detection.
2Ease of operation
If simple visual security features are used, then ease of inspection is improved, but machine readability is lost
Solution Approach 1:
The security element is designed to serve multiple functions simultaneously: it provides overt visual features for easy human inspection and covert features (specific optical patterns, luminescence characteristics, magnetic properties) that enable machine readability. This multi-functionality resolves the contradiction between inspection ease and machine readability.
3Ease of manufacture
If periodic patterns are used in security elements, then manufacturing simplicity is improved, but security against replication is reduced
Solution Approach 1:
The patent employs non-periodic, aperiodic patterns in the security element that lack translational symmetry. These asymmetric, non-repeating patterns are difficult to replicate accurately, thereby enhancing anti-counterfeiting reliability while maintaining manufacturing feasibility through conventional printing and coating techniques.
4Reliability
If multiple security materials are incorporated, then security reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple security materials (luminescent compounds, IR-absorbing materials, ferromagnetic particles, optically variable pigments) into a single integrated security element that can be applied to the document in one or few layers. This combining approach maintains high security reliability while minimizing structural complexity.
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The present invention is related to a security element comprising, as an authentication and forgery-protection means, a 2-dimensional non-periodic, quasi-crystalline tiling, said tiling being embodied in the form of a material or a material modification in or on said element. The present invention is also related to a document comprising said security element, the use of said security element as an authentication and forgery-protection means for a document, as well as to a method protecting a document against forgery, comprising a step of embodying a 2-dimensional non-periodic, quasi-crystalline tiling, in the form of a material or a material modification in or on a security element comprised by said document. The present invention is also related to a method for authenticating a document carrying a 2-dimensional non-periodic, quasi-crystalline tiling as an authenticating feature, comprising a step of calculating the Fourier Transform of an acquired image of said document or article and comparing the discrete parts of said Fourier Transform with the discrete Fourier Transform of a 2-dimensional non-periodic, quasi-crystalline tiling serving as the authenticating feature, hereby deriving an authenticity indication.