Security Marking with Dual Magnetic Zones for Reliable Authentication
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Solution Overview
Problem
Current smartphone-based authentication methods for magnetically induced layers are unreliable due to ambient light perturbations, require high-resolution printing, and complex smartphone movements, making it difficult to accurately authenticate these security features.
Innovation Solution
A security marking comprising magnetically oriented reflective platelet-shaped particles with distinct zones and a machine-readable marking, readable using a smartphone with controlled illumination and viewing angles, allowing for accurate decoding and authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If smartphone-based authentication methods are used for magnetically induced layers, then authentication can be performed, but the authentication becomes unreliable due to ambient light perturbations
Solution Approach 1:
The patent applies preliminary anti-action by pre-compensating for ambient light effects through controlled illumination conditions during authentication. The system uses a dedicated light source positioned at specific angles to counteract ambient light perturbations before they can affect the authentication accuracy, thereby maintaining reliable authentication despite varying environmental lighting conditions
2Measurement precision
If high-resolution printing is required for security marking, then authentication accuracy improves, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent applies parameter changes by modifying the optical parameters of the security marking, specifically using magnetically induced layers with controlled particle orientation. This allows the system to achieve high authentication accuracy not through high-resolution printing but through the magnetic orientation properties of the particles, which create distinct optical signatures that can be detected with standard imaging equipment
3Reliability
If complex smartphone movements are required for authentication, then authentication can be performed, but ease of operation decreases
Solution Approach 1:
The patent replaces complex mechanical movements with optical field manipulation. Instead of requiring the user to perform complex smartphone movements to authenticate, the system uses controlled illumination at specific angles and analyzes the reflected light patterns. This substitution of mechanical operations with optical field interactions significantly simplifies the user experience while maintaining authentication reliability
4Reliability
If magnetically induced layers are used for security features, then resistance to counterfeit improves, but difficulty of detecting and measuring increases
Solution Approach 1:
The patent exploits the optical properties of magnetically induced layers, specifically their angle-dependent reflectance characteristics. The magnetically oriented particles create distinct optical signatures that change with viewing angle, providing a clear detection mechanism. This optical signature approach simplifies detection compared to other security features, as the angular reflection profile can be captured and analyzed using standard imaging equipment without complex measurement systems
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
Provides reliable and robust authentication of magnetically induced layers, immune to ambient light variability and easy to discriminate against other angular dependent reflective marks, enabling secure access to online services.
Implementation Method 1
Magnetic or magnetizable pigment particles in printing inks or coatings allow for the production of magnetically induced layers, designs and/or patterns through the application of a corresponding magnetic field, causing a local orientation of the magnetic or magnetizable pigment particles in the unhardened coating
Implementation Method 2
The so-obtained magnetically induced layers produce an angular reflection profile that is substantially asymmetric with respect to the normal to the substrate onto which they are applied. This is unusual and differs from the classical specular or Lambertian reflection/scattering behavior
Data Source
AI summary
The invention relates to a security marking (100), a method and a device for reading and decoding the security marking (100), a security document (150) marked with the security marking (100), and a method and a system for verifying and authenticating said security document (150). The security marking (100) comprises a machine readable marking (130) overlapping with a magnetically induced layer (120) of a material including magnetically oriented reflective platelet-shaped magnetic or magnetizable pigment particles with two zones (120a) and (120b) of distinct orientations of the particles. The encoded data on the machine readable marking (130) being decodable only after the data separately read from the two zones (120a) and (120b) are gathered.