Real-Time Digital Watermarking via Server-Side API Filters
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Solution Overview
Problem
Current digital watermarking technologies are limited in providing long-term protection of digital data as they often rely on a single method of watermarking, making it feasible for unauthorized distribution of intellectual property to go undetected, especially when images are shared from FTP and Web servers.
Innovation Solution
A method for digitally signing information in real-time based on user requests, using a server-side API filter to watermark data with a signature that associates it with the request transaction, allowing multiple watermarking schemes and configurations to track the data back to its initial requester.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single digital watermarking method is employed, then the implementation is simple, but the protection effectiveness is reduced and can be easily defeated
Solution Approach 1:
The patent combines multiple digital watermarking methods (spatial domain, frequency domain, transform domain) into a single integrated system that can apply different watermarking techniques simultaneously or sequentially to the same digital image, creating layered protection that is much harder to defeat while maintaining manageable implementation through a unified workflow
2Productivity
If digital watermarking is applied prior to image request, then the watermarking process can be completed in advance, but the tracking capability to specific user requests is lost
Solution Approach 1:
The system transitions from static pre-applied watermarks to dynamic request-specific watermarks that are generated and applied in real-time based on the actual user request parameters, allowing the watermark content to adapt to each transaction while maintaining efficient processing through automated generation
3Object-generated harmful factors
If visible watermarks are used, then the copyright notice is obvious to users, but the image quality and usability are degraded
Solution Approach 1:
The patent applies different watermarking strategies to different regions or aspects of the image - using visible watermarks only where necessary for copyright notice while employing invisible or less intrusive watermarks in other areas, allowing the system to balance protection visibility with image quality preservation based on local requirements
4Loss of time
If pre-watermarking is done for all images, then the watermarking overhead is avoided during delivery, but the ability to track specific unauthorized distribution sources is eliminated
Solution Approach 1:
The system performs preliminary preparation by establishing the watermarking framework, configuring multiple watermarking methods, and setting up the infrastructure for real-time watermark generation, so that during actual delivery only the specific watermark instance needs to be created and applied, minimizing overhead while maintaining tracking capability
Data Source
AI summary
A method for digitally signing information in real-time, based on a user request for the information. In one embodiment, the method is useful in a Web server, and can be implemented using a server-side API filter. One embodiment of the method includes receiving a data request from a user and determining whether the data requested should be marked. If the data should be marked, the method includes marking the data with a signature identifying at least one component of the user request; and storing information identifying the user with the request and the at least one component. Multiple types of marking techniques can be used on a single data file.