Security Document Dual-Angle Optical Code Verification
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Solution Overview
Problem
Current security documents lack advanced features to effectively prevent counterfeiting and ensure secure verification, particularly in mobile verification scenarios where machine-readable features are required.
Innovation Solution
A security document is designed with optically readable features that include a first and second code, encoded using binary symbols, applied on a substrate in such a way that they can be viewed from different perspectives, preventing simple copying and ensuring authenticity through perspective-dependent visual and machine-readable elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple codes are applied to different reading areas on the substrate, then security against counterfeiting is improved, but device complexity increases
Solution Approach 1:
The security document is segmented into multiple reading areas (first reading area and second reading area) on the substrate, each containing a distinct code (first code and second code). This segmentation allows verification from multiple angles while maintaining a unified document structure, resolving the contradiction by distributing security features across spatial segments rather than concentrating complexity in one location.
Solution Approach 2:
The patent introduces a dimensional aspect by making codes readable from different viewing angles (first viewing angle and second viewing angle). The first code is readable from a first viewing angle while the second code is readable from a second viewing angle, adding an angular dimension to the verification process. This resolves the contradiction by utilizing spatial orientation rather than increasing the number of physical components.
2Ease of operation
If perspective-dependent optical codes are used, then ease of operation for mobile verification is improved, but manufacturing precision requirements increase
Solution Approach 1:
The optical codes are designed to be dynamic in their visibility, appearing only from specific viewing angles. The first code appears when viewed from the first viewing angle and the second code appears when viewed from the second viewing angle. This dynamic property enables mobile verification where the verifier can move the document or change viewing angles, improving ease of operation while the manufacturing precision is standardized for each angle-specific code.
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 enhances security by allowing secure verification of identity documents, such as passports and ID cards, by encoding safety-relevant information in a way that requires a change in perspective to read, making it difficult to counterfeit and ensuring the information is only accessible through authorized viewing angles.
Implementation Method 1
an optically readable security feature is generated on the substrate in which security-relevant information (data) consisting of a first and a second piece of information is encoded
Data Source
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AI summary
The invention relates to a method for producing a security document (300), comprising: providing a substrate for a security document (300) and producing, on the substrate, an optically readable security code feature in which security-relevant information consisting of first and second information is encoded. The invention provides the following: in a code generator the first information is encoded into a first code, in which the first information is encoded by means of binary symbols; in the code generator the second information is encoded into a second code, which is different from the first code and in which the second information is encoded by means of binary symbols; by means of a processing device the first code is applied as a first optical 1D, 2D or 3D code (301) to the substrate in a first read-out region (302), in such a way that the applied first code is optically readable at a first viewing angle relative to the surface of the substrate; and by means of the processing device the second code is applied as a second optical 1D, 2D or SD code (303) to the substrate in a second read-out region (304), which optionally at least partially overlaps the first read-out region (302), in such a way that the applied second code is optically readable at a second viewing angle relative to the surface of the substrate which is different from the first viewing angle. The invention further relates to a security document.