Switchable RFID Tag with Electronic Key Verification
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Solution Overview
Problem
RFID tags used for storing security, confidential, and personal information face unauthorized access issues due to their ability to be read by any RFID reader within range, even if the data is encrypted.
Innovation Solution
A remotely powered RFID tag with an electronically controlled switch that can be turned on or off, allowing it to transmit data only when specifically authorized, using a switch logic that compares received data with a stored key to determine whether to transmit an RF signal, thereby controlling its detectability and readability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If RFID tags are made readable by any RFID reader within range, then ease of operation is improved, but security is worsened
Solution Approach 1:
The patent applies the Dynamics principle by making the RFID tag's readability dynamic rather than static. The tag includes a switch mechanism that can change its state between readable and unreadable, allowing it to adapt to different security requirements. The tag responds to specific reader signals by switching to a readable state, while remaining unreadable to unauthorized readers, thus resolving the contradiction between ease of operation and security.
2Loss of information
If RFID tags transmit data continuously, then information availability is improved, but security is worsened
Solution Approach 1:
The patent applies the Periodic action principle by making data transmission periodic rather than continuous. The RFID tag transmits information only at specific intervals when activated by authorized readers, rather than continuously broadcasting data. This periodic transmission ensures information availability when needed while minimizing exposure to unauthorized access, resolving the contradiction between information availability and security.
3Object-affected harmful factors
If RFID tags include switch mechanisms for security, then security is improved, but device complexity is worsened
Solution Approach 1:
The patent applies the Self-service principle by designing the switch mechanism to operate automatically in response to reader signals without requiring external control. The RFID tag's integrated circuit receives signals from readers and autonomously switches between readable and unreadable states based on whether the reader is authorized. This self-service approach provides security functionality while minimizing the complexity of external switch control mechanisms.
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
Enhances security by ensuring that RFID tags only transmit data when intentionally activated, reducing the risk of unauthorized access and allowing for multiple states of information transmission based on the switch's position.
Implementation Method 1
Passive RFID tags may receive power either via a radio frequency signal (e.g., radio waves) or through electromagnetic induction
Data Source
AI summary
Various switchable RFID devices are disclosed. These switchable RFID devices may include one or more RFID tags and one or more switches. Some of these one or more switches are optionally wireless. In various embodiments, the switchable RFID devices include identity devices, financial devices, remote controls, and the like. In some embodiments, switches are configured to enter data into a switchable RFID device, for example to select a financial account.