DRM Anomaly Detection for Interoperable Content Protection
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Solution Overview
Problem
Existing digital rights management (DRM) systems lack interoperability, making them vulnerable to content piracy and 'white washing' as they assume uncompromised source and destination systems, failing to prevent the distribution of pirated content across different DRM systems.
Innovation Solution
Implementing a multimedia device with a rights creator entity that manages exercisable rights through a rights counter or duration clock, and an anomaly detection system that extends rights based on conditions, including generating and transmitting content hashes to detect and prevent unauthorized use across different DRM systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DRM systems are made interoperable to enable content exchange between different systems, then content distribution capability is improved, but vulnerability to piracy and white washing increases
Solution Approach 1:
The patent applies preliminary anti-action by implementing anomaly detection and rights validation mechanisms before content is transferred between DRM systems. The system proactively identifies potential piracy attempts and validates rights information before allowing interoperable content exchange, thereby preventing piracy while maintaining interoperability capability
Solution Approach 2:
The patent introduces an intermediary rights information validation mechanism that mediates between different DRM systems during content transfer. This intermediary layer verifies rights information and detects anomalies, enabling secure interoperability while blocking piracy attempts without requiring changes to the underlying DRM systems
2Ease of operation
If DRM systems assume source and destination systems are uncompromised to simplify operations, then ease of operation is improved, but reliability of content protection deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the system continuously monitors rights information and detects anomalies during content transfer operations. This feedback loop allows the system to automatically identify and respond to potential piracy attempts without requiring complex manual validation, maintaining both operational simplicity and protection reliability
Solution Approach 2:
The system performs preliminary validation of rights information and anomaly detection before completing content transfer operations. This preliminary action ensures that compromised transfers are blocked before execution, maintaining reliability without adding significant operational complexity to the user interface
Data Source
AI summary
A method in a multimedia device (130) including obtaining protected content having a limited exercisable right associated therewith, obtaining an extension of the limited exercisable right when a condition is satisfied, for example, when the device enters a DRM system different than the DRM system from which the protected content originated, wherein the extension of the limited exercisable right is obtained from an entity other than the multimedia device, for example, from an anomaly detector.