Dual-Layer Identification Document with Laser-Engraved Security
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Solution Overview
Problem
Existing identification documents are vulnerable to face morphing attacks, where personalized images can be manipulated to match multiple individuals, posing a significant security risk for authentication and leading to potential illegal activities.
Innovation Solution
The implementation of a dual-layer personalization system, where a first personalization layer is embedded within the carrier element through laser engraving and a second layer is applied on the surface, incorporating a laser-sensitive additive to prevent subsequent tampering, especially through laser engraving, by making it identifiable when attempted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single personalization layer is used in identification documents, then the manufacturing process is simpler and cost is lower, but the document becomes vulnerable to face morphing attacks and subsequent tampering
Solution Approach 1:
The personalization layer is divided into two separate layers: a first personalization layer embedded in the carrier element and a second personalization layer on the surface. This segmentation allows each layer to serve specific security functions, making the document resistant to face morphing attacks while maintaining a manageable manufacturing process through sequential application
Solution Approach 2:
The first personalization layer is embedded within the carrier element, creating a nested structure where one layer is contained within another. This nested arrangement provides inherent security as the embedded layer cannot be easily accessed or manipulated, while the outer layer provides visible personalization
2Manufacturing precision
If laser engraving is used for personalization, then precise and permanent data can be inscribed, but the document becomes vulnerable to subsequent laser-based manipulation and face morphing attacks
Solution Approach 1:
A protective layer is applied over the personalization layers before any laser engraving process. This protective layer contains additives that react to laser radiation by becoming visible or changing properties, thereby preventing subsequent laser-based manipulation. The preliminary application of this protective barrier neutralizes the harmful effect of laser attacks before they can alter the personalization data
3Reliability
If additional security layers and protective measures are added to prevent tampering, then the tamperproofing capability is enhanced, but the manufacturing complexity and production time increase
Solution Approach 1:
The protective layer with laser-reactive additives is combined with the personalization layers in a single integrated structure. This merging allows the security function and personalization function to be achieved simultaneously without requiring separate manufacturing steps, thereby maintaining high productivity while enhancing tamperproofing capability
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 significantly enhances the tamperproofing of identification documents, making it difficult to forge or manipulate the personalized data, thereby reducing the risk of unauthorized identity verification and associated illegal activities.
Implementation Method 1
The light/dark portion is inscribed into the transparent film by means of a laser writer, as a result of which more or fewer blackened regions of a grayscale image are produced
Implementation Method 2
a laser-sensitive additive (laser additive) is present in the second personalization layer or in a protective layer arranged above the second personalization layer
Data Source
AI summary
An identification document includes a carrier element, which has a surface with a personalization region. A first personalization layer is integrated in the carrier element in the personalization region at a depth below the surface; and a second personalization layer is located on and/or in the surface in the personalization region. A laser additive is integrated in the second personalization layer and/or in a protective layer arranged above the second personalization layer. The first personalization layer is a laser engraving formed by carbonizing the material of the carrier element. The laser additive contains particles, which absorb energy from a laser. A sensitization to laser beams can be weaker in the carrier element than in the second personalization layer and/or the protective layer. The first personalization layer may contain a black portion and the second personalization layer may contain a colored portion of a color image.