Automatic Update Mechanism for Trusted Digital Media Environments
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Solution Overview
Problem
Computing devices, being open platforms, pose challenges in protecting digital media from unauthorized copying and sharing, as users can install additional software that circumvents protection schemes, leading to concerns for content owners and the need for continuous updates to maintain security without impacting innocent users.
Innovation Solution
An automatic update mechanism that periodically checks for updates, downloads a new revocation list, and implements on-demand updates to ensure a trusted environment for processing protected content, thereby maintaining security and minimizing impact on legitimate users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If computing devices are designed as open platforms to allow additional software loading, then versatility and functionality are improved, but security and content protection are worsened due to ability to install circumvention software
Solution Approach 1:
The system performs preliminary actions by automatically checking for protection scheme updates before content processing occurs. The update mechanism proactively retrieves new revocation lists and applies them in advance, ensuring the protection scheme is ready to counter potential circumvention software before it can be executed or distributed.
Solution Approach 2:
The system implements feedback mechanisms through periodic checks with update services that monitor the security landscape. When vulnerabilities or circumvention methods are detected, the feedback loop triggers automatic updates to the protection scheme, allowing the system to adapt to new threats while maintaining open platform functionality.
2Reliability
If protection schemes are continually updated to counter circumvention software, then content protection is improved, but user convenience is worsened due to frequent disruptions and updates
Solution Approach 1:
The update mechanism performs preliminary actions by downloading and preparing updates in advance during periodic checks. This allows the system to have updates ready without forcing immediate interruptions, as the update process is prepared beforehand but executed only when necessary based on content protection requirements.
Solution Approach 2:
The system implements periodic action through scheduled checks with update services at predetermined intervals. This periodic mechanism ensures the protection scheme is maintained without requiring continuous user intervention or causing frequent disruptions, as updates are retrieved at regular intervals rather than continuously or on-demand.
3Reliability
If automatic updates are implemented to maintain trusted environment, then security is improved, but device complexity is worsened due to update mechanisms and revocation lists
Solution Approach 1:
The system implements self-service by automatically checking for updates, downloading revocation lists, and applying them without requiring user intervention. The update mechanism autonomously manages the complexity of maintaining trusted environments, handling revocation lists and protection scheme updates automatically while keeping the user experience simple.
Solution Approach 2:
The system uses an intermediary update service that mediates between the content protection requirements and the user interface. This intermediary layer handles the complex update logistics, revocation list management, and coordination with content providers, thereby simplifying the overall system architecture from the user's perspective while maintaining robust security.
Data Source
AI summary
The present automatic update mechanism provides a method for periodically checking for updates to support a trusted environment. During the periodic check, an indication from an update service is received if there is a recommended update. Upon receiving the indication, a new revocation list is downloaded from the update service and saved as a pending revocation list. The pending revocation list is then available for on-demand update when protected content requests a higher level of protection on a computing device than the protection provided by a current level of protection on the computing device.