Communications Terminal SIM Change Locking Mechanism
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Solution Overview
Problem
The risk of privacy information leakage from communications terminals, such as mobile phones, increases when they are lost or stolen, as malicious users can change the SIM card, rendering it difficult for the owner to track and recover the device while still accessing personal data.
Innovation Solution
Implementing a method and apparatus that monitors SIM changes, locks the terminal upon detection of a SIM change broadcast, and requires authentication using pre-set information (password, gesture, face, voice, or fingerprint) to unlock the device, ensuring only authorized users can access the terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal is locked immediately after SIM change to protect privacy, then information security is improved, but user convenience deteriorates because legitimate users cannot access their own devices
Solution Approach 1:
The system performs preliminary authentication by monitoring for SIM change broadcasts before locking the terminal. This allows the system to detect unauthorized SIM changes and lock the device before a malicious user can access sensitive information, while still allowing legitimate users to authenticate and unlock their devices
Solution Approach 2:
The authentication information acts as an intermediary mechanism between the SIM change detection and the terminal locking. The system requires verification of authentication information before locking or unlocking the terminal, serving as a mediator that balances security requirements with user convenience
2Reliability
If authentication information is required to unlock the terminal after SIM change, then privacy protection is improved, but device accessibility worsens due to additional authentication steps
Solution Approach 1:
Authentication information is set in advance before any SIM change occurs. When a SIM change is detected, the system already has the authentication credentials ready to verify, eliminating the need for complex real-time authentication setup and streamlining the unlocking process for legitimate users
Solution Approach 2:
The system changes the state parameter of the terminal from unlocked to locked based on SIM change detection, and then provides a mechanism to change it back to unlocked through authentication. This parameter change approach allows flexible control over device accessibility while maintaining security
Data Source
AI summary
Embodiments of the present invention disclose a method and an apparatus for controlling a communications terminal and a corresponding communications terminal, including: setting, in a communications terminal, authentication information of a subscriber identity module (SIM) change; monitoring a SIM change broadcast sent by the communications terminal, and setting, after the SIM change broadcast is monitored, the communications terminal to a locked state; and monitoring input information on the communications terminal, performing authentication and comparison, after the input information is monitored, on the input information and the set authentication information of a SIM change, and releasing, after the authentication succeeds, the locked state of the communications terminal. The embodiments of the present invention can improve security of information in a communications terminal.