Smart Card Audio Module for RF Metal Casing Interference
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Solution Overview
Problem
Existing smart cards face issues with data security and compatibility, as RF communications are affected by metal casings and require specialized devices, limiting their functionality and application.
Innovation Solution
Incorporating an audio module for communication with external devices using audio signals, enabling secure data processing and transmission of monetary transactions, and allowing the smart card to operate independently of RF modules, thus enhancing compatibility and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If RF communication is used for smart card data transmission, then communication speed is improved, but compatibility deteriorates due to metal casing interference and requirement for specialized reading devices
Solution Approach 1:
The patent introduces an audio module as an intermediary communication channel between the smart card and external devices. Instead of directly using RF communication which is blocked by metal casings, the system converts data into audio signals that can be transmitted through the casing, thus mediating the communication problem caused by metal interference
Solution Approach 2:
The patent replaces the electromagnetic field-based RF communication system with an acoustic signal transmission system. By substituting the communication mechanism from electromagnetic waves to sound waves, the system overcomes the limitation of metal casing interference while maintaining data transmission capability
2Reliability
If RF IC cards are used for secure data storage, then data security is improved, but ease of operation deteriorates due to requirement for specialized card-reading devices
Solution Approach 1:
The smart card is equipped with multiple communication modules including both RF module and audio module, enabling it to perform multiple communication functions. This allows the card to be read by various types of devices (RF readers, audio-equipped devices like smartphones) without requiring specialized equipment, thus improving ease of operation while maintaining security
Solution Approach 2:
The system changes the communication parameter from electromagnetic frequency (RF) to acoustic frequency (audio signals). This parameter change allows the same smart card to be accessed by different types of devices with different communication capabilities, improving operational convenience while the core security data remains protected in the RF IC chip
3Manufacturing precision
If metal casings are used for smart card construction, then manufacturing precision is improved, but reliability deteriorates due to interference with RF communication
Solution Approach 1:
The communication functionality is segmented into separate modules: an RF communication module for secure data storage and an audio communication module for data transmission. This segmentation allows the metal casing to be used for structural integrity while the audio module handles communication that is not affected by metal interference
Data Source
AI summary
The present disclosure includes a smart card. The smart card includes an audio module to receive a money deduction request in a form of an external audio signal from an external device, wherein the monetary-amount deduction request includes a monetary amount to be deducted and the external device's identification information. The smart card further includes a data processing module to authenticate the external device's identification information, deduct the monetary amount from the smart card after the authentication of the external device's identification information is passed, and generate monetary-amount-deduction result information. The audio module transmits to the external device the monetary-amount-deduction result information in a form of an audio signal, wherein the monetary-amount-deduction result information includes a deducted monetary amount to be added to the external device and the smart card's identification information to be authenticated by the external device.