Digital Content Protection via Segmented Header Authentication
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Solution Overview
Problem
Current digital content distribution systems fail to prevent unauthorized use and secondary unauthorized use, leading to loss of revenue for content holders, as decrypted content can be easily copied and reused without authorization.
Innovation Solution
A system that uses a recording medium with incomplete header information, where only the necessary piece data is transmitted for playback, ensuring that the content cannot be played or copied without authentication and charging verification, and automatically deletes the data after a predetermined period to prevent unauthorized use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If digital content is decrypted by the digital content playing device, then the content can be played, but the content can also be easily copied and secondary unauthorized use cannot be prevented
Solution Approach 1:
The header information is divided into multiple pieces (first piece, second piece, third piece) and stored separately. The data body cannot be played without assembling all header pieces, which requires authentication. This segmentation prevents unauthorized copying while enabling legitimate playback.
Solution Approach 2:
An management means (server) acts as an intermediary between the user and the content. It verifies authentication and charging conditions before providing the necessary header information pieces, controlling access without preventing the playing device from playing authorized content.
2Object-affected harmful factors
If automatic deletion of digital content after a predetermined period is implemented, then secondary unauthorized use is prevented, but collection of charge for secondary use cannot be expected
Solution Approach 1:
The system dynamically manages header information pieces based on authentication status and time. Authorized users can retrieve and use header pieces within valid periods, while the system can revoke access or prevent further retrieval after expiration, enabling both protection and continued revenue opportunities.
Solution Approach 2:
The system performs preliminary authentication and charging verification before providing header information pieces. This ensures that users must be authorized and paid before accessing content, preventing unauthorized use while enabling revenue collection.
3Ease of operation
If complete header information is provided to the digital content playing device, then content playback is enabled, but unauthorized copying becomes possible
Solution Approach 1:
Header information is segmented into multiple pieces stored separately. The playing device cannot assemble complete header information without authorized access to all pieces, which are distributed through authenticated channels. This maintains playback functionality while ensuring authorization control.
Solution Approach 2:
The system extracts and separates critical header information pieces from the content distribution medium, requiring users to obtain them through authenticated access to the management means. This extraction ensures that playback capability is tied to authorization status.
Data Source
AI summary
A system for preventing unauthorized use of digital content that can prevent unauthorized use of digital content and can reliably collect a charge for secondary use is provided. The system for preventing unauthorized use may include: a distributing recording medium α on which a content file having header information “A” and a data body “B” is recorded in a state of lacking play information “A1” indispensable for playing the data body “B” included in the header information a; a management center managing use of the content file on the distributing recording medium α and which can deliver the prepared play information “A1” of the header information “A” as piece data via a communication line β; and a digital content playing device which is a device used for playing the content file on the distributing recording medium α and has a function of communicating via the communication line β with the management center.