File System Superblock Encryption for Storage Security
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Solution Overview
Problem
Existing digital rights management systems for media content face challenges in preventing unauthorized duplication and distribution, particularly due to compatibility issues, computational demands, and processing delays when implemented on consumer-grade hardware.
Innovation Solution
Implementing a data protection system that selectively encrypts only specific portions of data stored on user-supplied storage devices, such as header information in file systems, to reduce processing demands while maintaining security, using techniques like AES encryption and dual digital codes for device and user authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full content encryption is implemented on consumer-grade storage devices, then security against unauthorized duplication is improved, but computational demands and processing delays increase significantly
Solution Approach 1:
The patent divides the storage device into multiple allocation groups, each with its own encrypted superblock. This segmentation allows the system to encrypt only critical metadata structures rather than all user data, significantly reducing computational overhead while maintaining security. The encrypted superblocks contain authentication information that prevents unauthorized access to unencrypted data regions.
Solution Approach 2:
The patent implements partial encryption by encrypting only the superblock information within each allocation group rather than the entire dataset. This partial action approach provides sufficient security by protecting the metadata that would enable data access, while avoiding the excessive computational burden of encrypting all user content on consumer-grade hardware.
2Use of energy by moving object
If selective encryption of header information is implemented, then processing demands are reduced, but compatibility issues with existing DRM systems arise
Solution Approach 1:
The patent introduces an intermediary authentication layer using encrypted superblocks that work with existing file systems. The encrypted metadata structures serve as a mediator between the storage device and existing DRM systems, providing security without requiring changes to standard file system operations or consumer-grade hardware.
Solution Approach 2:
The patent creates a universal encryption approach that works across different file systems and storage devices by encrypting the superblock structure itself rather than relying on file-level encryption. This multi-functional approach maintains compatibility with existing DRM infrastructures while providing enhanced security through authentication-based access control.
3Reliability
If authentication-based access control is implemented, then unauthorized duplication is prevented, but device complexity increases
Solution Approach 1:
The patent implements self-service authentication where the encrypted superblocks automatically verify device and user credentials during mounting operations. The system performs authentication autonomously without requiring complex external verification processes, reducing overall system complexity while maintaining strong access control. The authentication information is embedded directly in the encrypted metadata structures.
Data Source
AI summary
Systems, devices and automated processes provide robust, computationally-efficient and secure protection of media content or other electronic data stored on a user-supplied storage device through the use of efficient file system encryption. Only certain portions of the content are encrypted by the host device, thereby reducing the computational demand in comparison to encrypting all of the content. By selecting the particular portions to encrypt, the formatting and structure of the stored data can be concealed, thereby making the use of the unencrypted content very difficult, if not impossible. In implementations based upon the XFS file system, for example, the superblocks that store header information about the files stored on the drive can be encrypted, thereby rendering the unencrypted content