Digital Watermarking Across File Systems for VM Tracing
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Solution Overview
Problem
Existing digital content management systems lack versatility in embedding and detecting digital watermarks across various file systems, operating systems, and kernel versions, making it difficult to trace and verify digital contents such as virtual machine images, and the believability of verification results is compromised.
Innovation Solution
A digital content management system that includes a digital watermark embedding unit, a detection unit, and a verification unit, which generate and detect unique file names as watermarks, embedded across different file systems and operating systems, regardless of specific conditions, using a common secret key and certificate authority for verification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If digital watermark techniques specialized for picture and sound contents are used, then tracing capability for those specific content types is improved, but adaptability to general file sets such as virtual machine images deteriorates
Solution Approach 1:
The patent creates a universal digital watermarking system that works across multiple content types (picture, sound, and general file sets like VM images) by using a common embedding mechanism that operates at the file system level rather than content-specific levels, allowing the same technique to trace diverse digital contents
2Ease of manufacture
If data hiding techniques embedding information into specific file system regions are used, then embedding capability for those specific conditions is improved, but versatility across different file systems, operating systems, and kernel versions deteriorates
Solution Approach 1:
The patent develops a universal embedding technique that functions across different file systems (ext3, ext4, NTFS, FAT32), operating systems (Linux, Windows), and kernel versions by implementing a common approach that does not depend on specific file system structures or OS characteristics, enabling broad compatibility while maintaining embedding effectiveness
Solution Approach 2:
The patent segments the digital content into multiple files and embeds watermark information distributed across these files rather than concentrating it in a single specific region, which allows the technique to work regardless of the underlying file system structure or operating system
3Reliability
If digital watermark is embedded into digital content, then tracing capability is improved, but the complexity of the verification process to ensure believability of verification results increases
Solution Approach 1:
The patent implements a verification mechanism that provides feedback by checking for the presence of specific files (watermarked files) in the digital content, allowing verification of tracing results without requiring complex analysis, thus maintaining simplicity while ensuring reliability through the presence/absence check of embedded files
Data Source
AI summary
A digital content management system (1) includes: a digital watermark embedding device (100) which generates embedding information uniquely determined from identification information for tracking use, and embeds a digital watermark into a digital content to be managed, based on the thus-generated embedding information; a digital watermark detection device (200) which generates the tracking information uniquely determined from identification information for verification use, and detects the digital watermark in a digital content to be verified based on the thus-generated tracking information; and a verification device (300) which verifies the identification information for verification use supposed to be used for verifying the digital content to be verified in which the digital watermark was detected.