Tamper-Indicating Capsules for Electronic Security Documents
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Solution Overview
Problem
Security documents with electronic elements face challenges in distinguishing between attempted manipulation and accidental damage, as counterfeiters try to destroy or render unreadable the electronic components using large impulses or high temperatures, making it difficult to determine if the information unreadability is due to manipulation or a legitimate defect.
Innovation Solution
Incorporating encapsulated indicator agents in the crack prevention area around the electronic element, which burst upon exposure to large pulses or high temperatures, releasing a dye or starting materials that change color irreversibly, indicating attempted manipulation, while the soft crack prevention material absorbs minor impacts but not targeted strong blows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic element is protected by a soft crack prevention material, then accidental damage is prevented, but targeted manipulation attempts cannot be detected
Solution Approach 1:
The crack prevention material is segmented into two distinct layers: a soft material layer for absorbing accidental impacts and a hard layer containing indicator agents for detecting manipulation attempts. This segmentation allows each layer to perform its specific function without interfering with the other.
Solution Approach 2:
Indicator agents are embedded within the hard crack prevention layer as intermediary elements that respond specifically to manipulation attempts. These agents serve as mediators between the physical stress applied to the document and the visual indication of tampering, allowing detection without compromising the protective function of the soft material.
2Loss of information
If the electronic element is exposed to high temperatures or large impulses to destroy data, then unreadability is achieved, but the same conditions cause visible damage to the document
Solution Approach 1:
Indicator agents are pre-positioned in the hard crack prevention layer to react before the manipulation completely destroys the electronic element. This preliminary action provides early warning of attempted data destruction, allowing authorities to take preventive measures before the manipulation succeeds.
Solution Approach 2:
The indicator agents undergo visible color changes or produce visible stains when exposed to manipulation attempts involving high temperatures or large impulses. This color change mechanism provides a clear, visible signal of tampering that is distinct from the damage to the electronic element itself.
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 effectively differentiates between targeted manipulation and accidental damage by producing a visible color change or stain, alerting inspectors to potential tampering attempts, enhancing the security and integrity of the documents.
Implementation Method 1
the indicator agent, in particular a thermochromic indicator agent, undergoes an irreversible color change
Implementation Method 2
a thermochromic color layer, which covers a first piece of information, so that the first piece of information is not recognizable and only becomes recognizable after heat has been applied to the thermochromic color layer
Implementation Method 3
When a predetermined temperature is exceeded, the color of these thermochromic pigment dyes is then reversibly changed. This is done by adding to the pigment a material that can be heated by electromagnetic oscillations of at least 10 kHz, preferably electrically conductive, and which develops heat when electromagnetically stimulated
Implementation Method 4
The LCR resonant circuit serves to produce heat in the security element when excited by electromagnetic radiation, which then leads to a color change in the thermochromic color layer
Data Source
Figure 1
Figure 2~4
AI summary
The invention relates to a security or valuable document (11, 20) comprising an electronic element (24) for data storage, wherein, to indicate tampering attempts by large impulses and/or high temperatures on the electronic element (24), indicator media (42) are provided in capsules (41) in the area (36, 40) adjacent to the electronic element (24), particularly in the crack prevention area (40), and the capsules (41) are destructive by the action of a large impulse and/or a high temperature. (See Figure 4) The invention also relates to the use of a security or valuable document (11, 20) for the detection of tampering.