Security Document Authentication Using Multi-Illumination Optical Data
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Solution Overview
Problem
Existing methods for authenticating security documents are inadequate for spontaneous, on-site verification and lack reliability, particularly in distinguishing high-quality counterfeits from originals.
Innovation Solution
A method using a portable device, such as a smartphone, tablet, or PDA, equipped with sensors and internal light sources, captures and analyzes optical information from security elements under different illuminations to authenticate security documents reliably.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual inspection is used for authentication, then the method is simple and accessible, but the reliability and accuracy of distinguishing high-quality counterfeits is insufficient
Solution Approach 1:
The patent replaces manual visual inspection with an automated optical measurement system using sensors and light sources. The system captures optical information from security elements under controlled illumination conditions and uses automated evaluation to determine authenticity, substituting human visual judgment with instrumental measurement to achieve higher reliability.
Solution Approach 2:
The patent creates optical copies or representations of security element characteristics by capturing their optical information under specific illumination. These captured optical patterns serve as verifiable copies that can be compared against reference data, enabling reliable authentication without requiring physical handling or complex disassembly of the security document.
2Ease of operation
If stationary authentication devices are used, then high throughput verification is achieved, but portability and on-site verification capability are lost
Solution Approach 1:
The patent divides the authentication system into separable components: a portable evaluation device containing sensors and light sources, and a database system that can be accessed remotely. This segmentation allows the core verification functionality to be portable while maintaining access to comprehensive authentication data, enabling both portability and effective verification capability.
Solution Approach 2:
The portable evaluation device is designed to work with multiple types of security elements and documents by implementing universal optical measurement capabilities. The device can authenticate various security features using the same basic hardware platform, making it adaptable to different verification needs while maintaining portability.
3Reliability
If multiple security elements are present on security documents, then authentication capability is enhanced, but the difficulty of visual inspection and recall increases
Solution Approach 1:
The system enables each security element to be individually measured and evaluated through automated optical detection. The evaluation device systematically examines each security element's optical properties without requiring human observers to manually inspect and recall multiple features, allowing the system to handle multiple security elements efficiently and accurately.
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
Enables authenticating security documents independently and reliably from any location, providing higher protection against counterfeiting compared to visual methods.
Implementation Method 1
Capturing first optical information of the at least one first security element by means of the at least one sensor of the at least one device under a first illumination
Implementation Method 2
detecting third optical information of the at least one second security element by means of the at least one sensor of the at least one device under a directed third illumination
Data Source
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AI summary
The invention relates to a method for authenticating a security document by means of at least one device, wherein the method involves the following steps being performed, in particular in the following order: a) providing the security document comprising at least one first security element and at least one second security element; b) providing the at least one device, wherein the at least one device comprises at least one sensor; c) capturing first optical information of the at least one first security element by means of the at least one sensor of the at least one device during a first illumination, wherein at least one first dataset specifying this information is generated therefrom; d) capturing second optical information of the at least one second security element by means of the at least one sensor of the at least one device during a second illumination, wherein at least one second dataset specifying this information is generated therefrom; e) capturing third optical information of the at least one second security element by means of the at least one sensor of the at least one device during a third illumination, wherein at least one third dataset specifying this information is generated therefrom, the second illumination differing from the third illumination; f) checking the authenticity of the security document and/or of the second security element at least on the basis of the at least one second dataset and the at least one third dataset.