Portable Storage Controller File Protection Policy
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Solution Overview
Problem
Portable mass storage devices, such as SD and MicroSD cards, often lack encryption and file protection, making them vulnerable to data theft and tampering, especially in devices like dashcams and IoT devices that do not support encryption or file protection operations.
Innovation Solution
Implementing a portable storage device with a storage controller that automatically moves files from an unprotected area to a protected area based on user-defined policies, using a wireless connection to authenticate users before allowing access to the protected data, ensuring that only authorized users can access the encrypted or restricted files.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If portable storage devices use standard form-factor cards without encryption support, then compatibility and ease of operation are improved, but data security and protection capability deteriorate
Solution Approach 1:
The patent introduces a portable storage device as an intermediary between the digital device and the storage medium. This device includes a controller that implements file protection operations, acting as a mediator that adds security functionality to standard storage cards without requiring changes to the host digital device. The controller intercepts file operations and applies protection mechanisms transparently.
Solution Approach 2:
The portable storage device performs self-service by autonomously implementing file protection operations. The controller on the storage device independently manages encryption, file movement between protected and unprotected areas, and access control without requiring the host digital device to have built-in security capabilities. This allows the storage device to protect data even when the host device lacks security features.
2Reliability
If file protection operations are implemented on portable storage devices, then data security is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by implementing protection only for specific files based on user-defined policies rather than protecting all data uniformly. The controller identifies which files require protection and applies security measures selectively, reducing unnecessary complexity. Files can be categorized into protected and unprotected areas based on their sensitivity and policy requirements.
Solution Approach 2:
The system changes parameters dynamically by moving files between protected and unprotected storage areas based on policy conditions. The controller monitors file access patterns and policy violations, and adjusts the protection state accordingly. This parameter-based approach allows flexible security management without hardcoding complex protection logic for every scenario.
3Reliability
If files are moved between protected and unprotected areas based on policies, then data protection capability is improved, but processing time and productivity are reduced
Solution Approach 1:
The patent implements preliminary action by pre-defining protection policies that specify which files should be protected and under what conditions. These policies are established in advance, allowing the controller to make rapid decisions about file protection without complex real-time analysis. Common scenarios are pre-configured, enabling fast automated enforcement.
Solution Approach 2:
The controller implements skipping by efficiently moving only the necessary files between protected and unprotected areas based on policy violations. When a policy breach is detected, the system rapidly identifies and relocates only the affected files rather than reprocessing entire datasets. This minimizes the time impact on normal operations while maintaining security.
Data Source
AI summary
Aspects include receiving, at a portable storage device, a file from a digital device. The file is stored into an unprotected storage area on the portable storage device and a storage policy associated with the digital device is accessed by the portable storage device. It is determined, by the portable storage device, based at least in part on the portable storage policy, whether to store a copy of the file in a protected storage area on the storage device. Access to the protected storage area is restricted to authenticated users. A copy of the file is stored in the protected storage area in response to determining that a copy of the file should be stored in the protected storage area.