Terminal Anti-Theft Locking Through Secure-Storage Account Matching
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Solution Overview
Problem
Current anti-theft methods for terminal devices, such as mobile phones and tablets, are ineffective due to the bypassing or erasure of identity verification mechanisms during unauthorized ROM flashing, allowing thieves to access and steal user data.
Innovation Solution
Implementing a secure storage chip to store an anti-theft identifier and a first account, which allows the device to perform identity verification by comparing the first account with the currently logged-in account, locking the device if they are inconsistent, thereby preventing unauthorized use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If FRP lock or activation lock is set in boot wizard stage, then identity verification is performed to prevent unauthorized ROM flashing, but the boot wizard stage can be bypassed by some ROM flashing means, causing the anti-theft mechanism to fail
Solution Approach 1:
The patent writes the anti-theft identifier to the secure storage chip before the device is lost or stolen. This preliminary action ensures that the identifier is already in place and cannot be erased or tampered with during subsequent ROM flashing operations, making the anti-theft mechanism effective against all bypass methods
Solution Approach 2:
The patent introduces a secure storage chip as an intermediary component to store the anti-theft identifier. This secure storage chip acts as a mediator between the identity verification system and the device's main storage, protecting the identifier from being accessed or modified by unauthorized ROM flashing operations
2Ease of operation
If anti-theft identifier is stored in traditional storage, then it can be accessed for verification, but it can be erased or tampered with during unauthorized ROM flashing
Solution Approach 1:
The secure storage chip serves as an intermediary that protects the anti-theft identifier from unauthorized access while allowing legitimate verification. It mediates between the need for accessibility (for verification) and the need for integrity (protection from tampering), enabling the system to achieve both goals simultaneously
Data Source
AI summary
This application provides a terminal anti-theft method and a terminal device. The method includes: The terminal device reads an anti-theft identifier if the terminal device is in a powered-on and running state, where the anti-theft identifier is stored in the secure storage chip; the terminal device reads a first account from the secure storage chip when the anti-theft identifier indicates that the terminal device is in a lost state, where the first account is an account associated with the terminal device; the terminal device obtains a second account, where the second account is an account that is currently logged-in on the terminal device; the terminal device determines whether the first account is consistent with the second account; and the terminal device displays a first interface if the first account is inconsistent with the second account, where the first interface indicates that the terminal device is locked.