Reversible Deactivation of RFID Tags via UID Inhibition
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Solution Overview
Problem
Existing RFID tag deactivation methods are either irreversible, rendering tags unusable, or they fail to protect all data, particularly the unique identifier, allowing tracking and identification.
Innovation Solution
A method for managing RFID tag operation that allows reversible deactivation by inhibiting access to the unique identifier, using a substitution identifier and passwords for secure deactivation and reactivation, while maintaining communication capabilities in a deactivated state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a kill command is used to deactivate the tag, then the tag becomes totally mute and inaccessible, but the deactivation is irreversible and the tag cannot be reactivated
Solution Approach 1:
The patent implements a dynamic deactivation mechanism where the tag's identifier accessibility can be switched between activated and deactivated states. The system uses a data field that can take different values (first value for activated, second value for deactivated) to dynamically control the tag's operational state, allowing reversible transitions between states rather than permanent deactivation.
Solution Approach 2:
The patent changes the parameter of identifier accessibility by modifying the value in a specific data field of the tag memory. When the field contains a first value, the identifier is accessible; when it contains a second value, the identifier is inaccessible. This parameter change enables reversible deactivation without permanent damage to the tag.
2Reliability
If the unique identifier is protected by password, then authorized users can restore access, but the UID cannot be protected because it is necessary for establishing communication during anti-collision phase
Solution Approach 1:
The patent performs preliminary action by establishing communication with the tag using its unique identifier during the anti-collision phase before deactivation is enforced. Once communication is established, the system then modifies the data field to prevent further identifier access, ensuring that initial communication can occur while subsequent access is protected.
Solution Approach 2:
The patent introduces an intermediary mechanism - a controllable data field in the tag memory - that mediates between the need for identifier protection and communication establishment. This intermediary allows the system to control identifier accessibility independently of the communication protocol, enabling protected communication after initial connection.
3Object-affected harmful factors
If EAS function is activated for anti-theft, then the tag responds to ALARM command, but this does not protect the data contained in the tag
Solution Approach 1:
The patent merges the EAS anti-theft function with enhanced data protection by combining the alarm response capability with identifier accessibility control. The system integrates both functions into a unified deactivation mechanism that simultaneously provides theft prevention through alarm and data security through identifier protection.
Solution Approach 2:
The patent creates a multi-functional deactivation system that serves multiple purposes: it provides anti-theft alarm response, protects tag data from unauthorized access, and enables reversible deactivation. This universal mechanism replaces or supplements limited EAS functionality with a comprehensive security solution.
Data Source
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AI summary
The invention relates to a method for managing the operating mode of an electronic tag, including at least one communication module (RF) for communicating with at least one control device and a memory (M) for storing at least one tag identifier (UID) specific to said tag and transmittable by the tag to said at least one control device. According to the invention, such a method comprises, following the reception of a deactivation instruction (D) upon which said tag goes from an activated state to a deactivated state, a deactivation step (10), in which the transmission, to said control device, of said tag identifier is inhibited and in which said tag responds to a reactivation instruction (R) by re-enabling the transmission of said tag identifier (UID) to said control device.