External Storage Data Backup and Overwrite for Unauthorized Access Prevention
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Solution Overview
Problem
Conventional password protection methods for storage devices are not secure enough, as passwords stored on circuit boards can be compromised by replacing the circuit board, allowing unauthorized access to data.
Innovation Solution
A method that uses a preset external storage device to back up data from a predetermined segment of a storage device and writes a specific data template over the original data when the system is powered off or in an unusual status, preventing unauthorized access by requiring the external device for data recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If password protection is implemented using a circuit board, then data security is improved, but the system becomes vulnerable to circuit board replacement attacks
Solution Approach 1:
The password protection function is segmented from the storage device circuit board and relocated to an external removable storage device. This segmentation ensures that the password cannot be accessed by simply replacing the storage device's circuit board, as the authentication credentials now reside on a separate, controllable external device.
Solution Approach 2:
An external removable storage device is introduced as an intermediary between the user and the storage device's data access. This intermediary holds the password and controls authentication, preventing direct access to the storage device without proper authorization.
2Reliability
If data is backed up to external storage and covered with template data, then unauthorized access is prevented, but data recovery requires the external device
Solution Approach 1:
Before potential unauthorized access scenarios, the system preliminarily backs up critical data to external storage and covers it with template data. This preliminary action ensures that even if the storage device is accessed without authorization, the actual data remains protected and can only be recovered with the external device containing the backup.
Solution Approach 2:
The system creates a copy of the critical data and stores it on an external removable storage device. This copying mechanism allows the original data to be covered with template data for protection, while the copy on the external device serves as the sole means for legitimate data recovery.
3Reliability
If the system checks for external storage connection during power-off, then data protection is activated, but system complexity increases
Solution Approach 1:
The system automatically performs data protection operations by checking for external storage connection during power-off events without requiring user intervention. The BIOS or system firmware self-manages the backup and data covering process, reducing the perceived complexity for users while maintaining robust protection.
Data Source
AI summary
A method for protecting data, adapted for a computer system, is provided. The computer system includes a storage device. The method includes: when the computer system executes a power-off procedure, inspecting whether a preset external storage device is connected to the computer system; if it is determined that the preset external storage device is connected to the computer system, when the computer system executes the power-off procedure, backing up data of a predetermined segment of the storage device to the preset external storage device, and generating a back-up data, and then writing a specific data template to the predetermined segment for covering original data of the predetermined segment.