Tamper-Resistant RFID Tag Using Destructible Vinyl Substrate
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Solution Overview
Problem
RFID tags used in traffic-related applications are vulnerable to theft, leading to burdensome costs and administrative challenges for users and agencies, as stolen tags can be used in unauthorized vehicles until the theft is reported and countermeasures are taken.
Innovation Solution
A tamper-resistant RFID tag design featuring a destructible vinyl substrate with conductive wiring and a rigid plate that encompasses the RFID device, where the plate is only adhered to the substrate around the edges, causing the tag to self-destruct when removed from an object, thereby breaking the electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the RFID tag is made removable for legitimate use, then the tag can be transferred between vehicles, but the tag can be stolen and used in unauthorized vehicles
Solution Approach 1:
The RFID tag is segmented into multiple components: a flexible substrate with conductive wiring, an RFID device, a rigid plate with cavity, and a backing. These segments are assembled together but designed to separate under theft conditions, with the rigid plate acting as a mechanical trigger that causes the flexible substrate to detach and destroy the electrical connections.
Solution Approach 2:
The system is pre-configured with a rigid plate having a cavity that encompasses the RFID device, positioned between the flexible substrate and the backing. This preliminary structural arrangement ensures that when external force is applied during theft attempts, the rigid plate will separate from the flexible substrate first, automatically triggering the destruction mechanism before the thief can access or remove the RFID chip.
2Reliability
If the RFID tag is securely attached to prevent theft, then security is improved, but legitimate removal and transfer becomes difficult
Solution Approach 1:
The attachment mechanism is dynamic rather than static. The rigid plate is initially attached to the flexible substrate to provide security, but the design allows for controlled separation under specific conditions. The mechanical interaction between the rigid plate and flexible substrate creates a system that transitions from a secured state to a destroyed state based on the force applied, enabling both security and legitimate removal.
Solution Approach 2:
The system changes its mechanical parameters based on applied force. Under normal conditions, the rigid plate maintains strong attachment to the flexible substrate. However, when sufficient force is applied (either through theft or legitimate removal procedures), the mechanical connection parameters change, causing separation and subsequent destruction of the electrical connections, thus resolving the contradiction between secure attachment and ease of removal.
3Ease of manufacture
If the RFID tag structure is simple for easy manufacture, then manufacturing cost is reduced, but tamper resistance is compromised
Solution Approach 1:
The RFID tag is divided into manufacturable segments: a flexible substrate with printed conductive wiring, a separate rigid plate with a cavity, and a backing layer. Each component can be manufactured independently using standard processes, then assembled together. This segmentation maintains manufacturing simplicity while enabling the complex tamper-resistant behavior through the interaction of components.
Solution Approach 2:
The system uses composite construction combining a flexible substrate material with a rigid plate material. This composite structure provides both the flexibility needed for substrate manufacturing and the rigidity needed for tamper resistance. The contrasting mechanical properties of the composite materials enable the automatic destruction mechanism while maintaining ease of manufacture through standard composite assembly techniques.
Data Source
AI summary
A tamper-resistant electronic system includes a destructible vinyl (DV) substrate having conductive wiring disposed on a first surface of the DV substrate. An RFID device has pins mechanically and electrically connected to the wiring on the first surface of the DV substrate. A plate has a first surface, and a portion of the first surface of the plate is adhered to a portion of the first surface of the DV substrate. The plate has a cavity that encompasses the RFID device. A backing is adhered to a second surface of the plate opposite the first surface of the plate.