Display Output Compliance Verification via Content Path Signatures
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing content protection schemes struggle to verify the compliance of display outputs, particularly in scenarios where display content can be maliciously rerouted from intended to unintended destinations, compromising the integrity and security of premium content.
Innovation Solution
A method and system that verify the connection status information associated with specific display attachment locations by receiving a signature representative of connection states, authenticating the integrity of the content path, and deciding whether to continue sending content to ensure compliance with content protection requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional graphics adapter processing is used, then content can be delivered to multiple display outputs, but the content path integrity cannot be verified and malicious rerouting may occur
Solution Approach 1:
The system performs preliminary actions by establishing cryptographic signatures and connection state tracking before content delivery. The graphics subsystem generates signatures representing connection states and delivers them to the content player ahead of time, enabling proactive verification rather than reactive detection.
Solution Approach 2:
The system implements continuous feedback loops where the content player verifies signatures against actual content paths, and the graphics subsystem updates connection state information based on verification results. This closed-loop feedback ensures ongoing integrity monitoring throughout the content delivery process.
2Reliability
If signature verification is implemented, then content path integrity is authenticated, but additional verification steps increase processing time
Solution Approach 1:
Connection state signatures are generated and delivered to the content player in advance, before actual content playback begins. This preliminary preparation allows verification to occur in parallel with content delivery rather than sequentially, minimizing impact on playback performance.
Solution Approach 2:
The system uses cryptographic copies (signatures) of connection state information that can be verified without examining the actual content stream. These signature copies enable rapid verification operations that do not require processing the full content data, significantly reducing verification overhead.
3Measurement precision
If comprehensive connection state tracking is performed, then all display outputs can be monitored, but system complexity increases
Solution Approach 1:
The patent introduces signature data as an intermediary representation of connection states. Instead of directly monitoring and comparing complex connection state information, the system uses simplified signature tokens that encapsulate the essential verification information, reducing the complexity of tracking and comparison operations.
Solution Approach 2:
The system creates simplified cryptographic copies (signatures) of the actual connection state information. These signature copies contain verified information about connection states without requiring the system to maintain and process the full complexity of the original connection state data structures.
Data Source
AI summary
A method and system are implemented for verifying connection status information associated with a specific display attachment location. Specifically, one embodiment of the present invention sets forth a method, which includes the steps of receiving a first signature representative of a first set of connection states tracked by a graphics subsystem associated with the display attachment location, authenticating whether the integrity of a content path including the display attachment location is maintained based on the first signature, and deciding whether to continue sending the content to the display attachment location so that requirements associated with protecting the content are satisfied.