NFC Device EMI Shielding for Mobile Payment Security
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Solution Overview
Problem
Current contactless payment systems using RFID tags face security risks and unreliable operations due to lack of third-party authentication and susceptibility to electromagnetic interference, especially when integrated with mobile communication devices.
Innovation Solution
A near field communication (NFC) device with an RFID tag, loop antenna, and electromagnetic interference (EMI) shield, where the user ID is stored and sent to a certification authority for authentication, and transaction amounts are calculated by a remote application server, ensuring security and reliability by isolating the NFC device from the communication device's interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If RFID tags are combined with mobile communication devices to enable contactless payment, then payment convenience is improved, but the system becomes vulnerable to electromagnetic interference and operational failures from internal device components
Solution Approach 1:
The patent divides the mobile device into separate functional zones: an NFC communication zone for secure transactions and a processing zone for handling electromagnetic interference. The NFC antenna is physically separated from the mobile device's antenna and battery, creating independent operational spaces that prevent interference while maintaining payment functionality.
Solution Approach 2:
The patent introduces an intermediary shielding structure between the NFC component and the mobile device's internal components. This intermediary layer blocks electromagnetic interference from the battery and processing units while allowing the NFC tag to communicate with external readers, thus protecting the NFC operation without compromising the mobile device's functionality.
2Adaptability or versatility
If transaction data is stored directly in the RFID tag to enable monetary value recording, then transaction capability is improved, but security risks increase due to lack of third-party authentication
Solution Approach 1:
The patent introduces a third-party authentication server as an intermediary between the NFC tag and the transaction processing system. This server verifies the authenticity of transaction data before it is recorded, ensuring that only legitimate transactions are processed. The authentication server acts as a mediator that prevents unauthorized or fraudulent transactions from compromising the RFID tag's stored data.
Solution Approach 2:
The patent implements a feedback mechanism where the authentication server continuously monitors and verifies transaction data. After a transaction is initiated, the system receives feedback from the authentication server confirming the validity of the transaction before allowing data recording. This feedback loop ensures ongoing security verification and prevents fraudulent activities from succeeding.
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 provides a secure, reliable, and convenient authentication and transaction process by preventing electromagnetic interference and relying on a third-party authentication, reducing the risk of financial losses and ensuring successful transactions.
Implementation Method 1
an electromagnetic interference (EMI) shield is provided between the NFC device and the communication device, so as to effectively prevent the electromagnetic interference and magnetic interference from the circuit and components in the communication device from impacting the NFC device
Implementation Method 2
The NFC device includes a radio frequency identification (RFID) tag, a loop antenna... when the NFC device is near a NFC reader device, the user ID is sent to the NFC reader device from the loop antenna
Data Source
AI summary
A near field communication (NFC) device, an authentication system using the NFC device and an authentication method thereof are provided. The NFC device includes a RFID tag, a loop antenna, a flexible fabric packaging material and an EMI shielding material. The device can be easily adhered to objects including most handsets for mobile phone services. By adopting the authentication system and the authentication method, the device can be paired with a typical mobile phone and used to authenticate the user, thereby enabling mobile payment and mobile banking activities using mobile phones.