NFC Secure Element Card Switching While the Terminal Is Powered Off
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Solution Overview
Problem
Existing terminals face inefficiencies in automatic security service switching, particularly when powered off, and lack the ability to perform such switching without involving the Rich Execution Environment (REE) and Trusted Execution Environment (TEE) modules.
Innovation Solution
A method and terminal design that utilizes the Secure Element (SE) module and Near Field Communication (NFC) module to perform automatic security service switching independently of the REE and TEE, enabling power-efficient switching even when the terminal is off, by determining and activating appropriate cards based on predefined whitelists and customized responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the terminal uses the REE and TEE modules for security service switching, then the switching can be performed with full system resources, but the switching speed is reduced and the terminal cannot switch services when powered off
Solution Approach 1:
The patent segments the security service switching function from the main terminal system by implementing it independently in the SE module. This segmentation allows the switching operation to occur in isolation from the REE and TEE modules, thereby improving switching speed and enabling operation even when the terminal is powered off, while maintaining security through the isolated SE environment
2Productivity
If the terminal manually activates the SE application, then the user has full control over security services, but the switching efficiency is low and requires user intervention
Solution Approach 1:
The patent implements self-service by enabling the SE module to automatically detect card reading devices and autonomously activate the appropriate SE application without requiring user intervention. The system monitors for NFC device proximity and automatically performs the activation process, thereby improving switching efficiency while eliminating the need for manual user actions
Solution Approach 2:
The system employs feedback mechanisms where the SE module continuously monitors the operational state of the terminal and the presence of card reading devices. Based on this feedback, the system automatically determines when activation is needed and executes the switching process, creating a closed-loop control system that improves efficiency without user involvement
3Use of energy by moving object
If the terminal is powered off to save energy, then energy consumption is reduced, but the terminal cannot perform automatic security service switching
Solution Approach 1:
The patent segments the security service switching function from the main terminal system by implementing it independently in the SE module. This segmentation allows the switching operation to occur in isolation from the REE and TEE modules, thereby improving switching speed and enabling operation even when the terminal is powered off, while maintaining security through the isolated SE environment
Solution Approach 2:
The patent enables continuous useful action by allowing the SE module to remain operational and perform security service switching even when the terminal is powered off. The SE module maintains its functionality independently, ensuring that security services can be activated and switched without requiring the terminal to be fully powered on, thus extending the availability of security operations
Data Source
AI summary
A method includes, when a first card in a secure element (SE) system of a terminal is in an inactive state after the terminal is powered off, subsequent to receiving, using a near-field communication (NFC) system, an instruction for selecting the first card that is received from a card reading device, the terminal determines, based on the instruction, that the first card allows automatic card switching, and activates the first card using the SE system, and after the terminal receives again, using the NFC system, the instruction for selecting the first card from the card reading device, the first card of the terminal executes a transaction service with the card reading device.