Digital Content Protection via Device-Specific Validation
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Solution Overview
Problem
Existing digital content protection methods, such as encryption using unique hardware identifiers, are vulnerable to security breaches and do not effectively restrict execution to specific devices, allowing unauthorized access and code reuse.
Innovation Solution
A method and system that generates a protected version of digital content with device-specific checks, ensuring execution only on the intended device by incorporating encryption and obfuscation techniques, using device parameters like ID, model, and other attributes to validate and restrict usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If encryption is applied to digital content using hardware identifiers, then code protection is improved, but security is compromised because the player remains unobfuscated and vulnerable to decryption attacks
Solution Approach 1:
The patent merges encryption and obfuscation techniques into a unified protection mechanism. The digital content is both encrypted to protect the decryption key and obfuscated to hide the player code structure, creating a layered security approach where both techniques work together to address the vulnerability of using only encryption.
Solution Approach 2:
The protection mechanism uses a composite approach combining multiple security techniques (encryption + obfuscation) similar to how composite materials combine different properties. The encrypted content is wrapped within obfuscated player code, creating a multi-layered protection structure that resists both decryption attacks and code analysis.
2Adaptability or versatility
If hardware identifiers are embedded in the transmitted decoder file, then device-specific validation is achieved, but the decoder becomes dependent on external files rather than solely on client device
Solution Approach 1:
The patent extracts the device validation logic from external decoder files and embeds it directly within the obfuscated player code. This eliminates the dependency on external files containing hardware identifiers, while still maintaining device-specific validation capabilities through integrated checks within the player itself.
Solution Approach 2:
The obfuscated player code acts as an intermediary that contains both the decryption logic and device validation mechanisms. Instead of relying on separate external files, the player itself serves as the mediator that validates device identifiers and controls content decryption, simplifying the overall system architecture.
3Ease of operation
If code is decrypted at the client device using transmitted keys, then execution is enabled, but the decrypted code can be installed and executed on any other client
Solution Approach 1:
The patent applies preliminary anti-action by embedding device validation checks within the obfuscated player code before decryption occurs. The player verifies device identifiers during the decryption process itself, preventing the decrypted content from being executed on unauthorized devices. This preemptive validation stops code reuse before it can happen.
Solution Approach 2:
The protection mechanism is made dynamic through runtime validation. The obfuscated player code continuously checks device identifiers during execution, and the decryption process is dynamically controlled based on validation results. This dynamic approach ensures that even if code is decrypted, it cannot be transferred or executed on different devices without failing validation checks.
Data Source
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Figure 3A~3B
AI summary
The present disclosure provides a method and system for generating digital content for a computing device which will function on the computing device only after successful validation. The system installs one or more checks in the digital content that restrict the execution of the digital content to a specific device for which the digital content is generated. The checks pertain to at least one or more parameters of a device including without limitation, a device ID, a device model, or any device specific feature. In addition, the system generates a protected version of the digital content with the one or more installed checks to be transmitted to a client.