Write-Once RFID Tag Access Tracking via Electronic Seal
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Solution Overview
Problem
There is a need to ensure secure and tamper-proof tracking of item access within containers during transportation to prevent unauthorized access, damage, or counterfeiting, especially in commercial and military contexts where items are frequently handled by various parties.
Innovation Solution
A system utilizing RFID tags and an electronic seal that detects access events and records them in a write-once memory, allowing recipients to verify if unauthorized access has occurred, enhancing security and reliability in item transport by providing a record of access events without requiring separate sensors on each item.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID tags with readable memory are used to track items, then item identification and tracking is enabled, but the memory can be altered or erased allowing unauthorized access to go undetected
Solution Approach 1:
The patent applies preliminary action by pre-configuring the RFID tag memory as write-once memory before the item is sealed in the container. This prevents any subsequent alterations to the access history record, ensuring that once an access event is recorded, it cannot be modified or erased by unauthorized parties. The write-once constraint is established in advance to guarantee the integrity of the tracking data.
Solution Approach 2:
The patent implements preliminary anti-action by using write-once memory to preemptively counteract potential unauthorized alterations. The memory's inherent property of not allowing rewrites creates a built-in defense mechanism that automatically prevents tampering attempts before they can compromise the tracking reliability.
2Measurement precision
If separate sensors are attached to each item for access detection, then item-level monitoring is achieved, but system complexity and cost increase significantly
Solution Approach 1:
The patent merges the access detection functionality into the electronic seal that secures the container, rather than requiring separate sensors on each item. The electronic seal incorporates sensors and processing logic to detect when the container is opened and to trigger the writing of access events to the RFID tags. This consolidation reduces system complexity while maintaining item-level tracking capability through the RFID tags associated with each item.
Solution Approach 2:
The electronic seal serves multiple functions: it secures the container, detects access events through integrated sensors, determines authorization status, and writes access information to the RFID tags. This multi-functional approach eliminates the need for separate dedicated sensors on each item, reducing overall system complexity while achieving comprehensive item-level monitoring.
3Reliability
If write-once memory is used in RFID tags, then unauthorized access is detectable, but the memory cannot be updated or corrected
Solution Approach 1:
The patent segments the memory functionality by dividing it into write-once portions for access history recording and other modifiable portions for item identification and other data that may need updates. This segmentation allows the critical access records to remain immutable while other information can be updated as needed, balancing integrity requirements with operational flexibility.
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 system provides item-level access tracking and authenticity verification, enabling recipients to determine if items have been tampered with, thus ensuring the security and integrity of the supply chain without the need for additional sensors on each item, and allowing for corrective actions such as rejection or inspection.
Implementation Method 1
A system utilizing RFID tags and an electronic seal that detects access events and records them in a write-once memory
Data Source
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AI summary
An electronic seal may be associated with a container and configured to detect an access event associated with the container, and may be further configured to output a notification of the access event in response thereto. A tag writer may be configured to receive the notification of the access event and further configured, in response, to write a data element to a write-once memory of a tag that is attached to an item within the container, the data element signifying the access event.