Content Presentation Latency Reduction via Preliminary DRM Setup
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Solution Overview
Problem
Digital Rights Management (DRM) schemes cause delays in content presentation, leading to an undesirable user experience due to the time required for encryption key exchange and device validation, resulting in a noticeable latency of about five seconds before DRM-protected content can be displayed.
Innovation Solution
The system initiates content presentation with unencrypted content, which is then seamlessly transitioned to encrypted content, using a simpler encryption scheme for the initial portion and applying transition effects to minimize user perception of the latency, allowing immediate start of content playback without waiting for full DRM setup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DRM protection is implemented for content distribution, then content security and rights protection are improved, but content presentation latency increases due to encryption key exchange and device validation
Solution Approach 1:
The system performs DRM setup, encryption key exchange, and device validation in advance before the user actually views the content. By completing these security-critical operations beforehand, the system ensures content protection is established while eliminating the latency from the user's viewing experience. The content can then be displayed immediately without waiting for DRM processing during playback.
2Reliability
If full DRM encryption is applied to content from the start, then content protection is maintained, but content playback is delayed until DRM configuration completes
Solution Approach 1:
DRM configuration, including encryption key exchange and validation, is executed as a preliminary step before content playback begins. This allows the system to establish secure content protection in advance so that when the user initiates playback, the content can be displayed immediately without waiting for DRM processing during the actual viewing experience.
3Loss of time
If unencrypted content is used for immediate playback, then content presentation latency is reduced, but content security and DRM protection are compromised
Solution Approach 1:
The system performs DRM setup and encryption key exchange as preliminary actions before content playback. This timing strategy allows unencrypted or pre-decrypted content to be used during playback (reducing latency) while ensuring that security measures are already in place from the beginning. The DRM protection is not compromised because the security infrastructure is established beforehand, enabling both immediate playback and secure content delivery.
Data Source
AI summary
Described herein are systems and methods for initiating presentation of content on a device. Unencrypted content is received for presentation. During presentation of the unencrypted content, encrypted content is accessed, decrypted and prepared for presentation. Once available, the presentation transitions from the unencrypted content to the encrypted content. As a result, latencies involved in accessing the encrypted content do not affect presentation to a user.