Wireless Display Transmitter Secure Content Pass-Through
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Solution Overview
Problem
Current wireless display systems incur high costs and power consumption when decrypting and re-encrypting secure Digital Rights Management (DRM) content for transmission, particularly in battery-powered mobile devices, due to the need for transcription operations.
Innovation Solution
Implementing a secure execution environment in both display transmitter and receiver devices that determines and provides decryption and presentation licenses based on the DRM scheme and credentials of the receiver, allowing secure DRM content to be passed through without transcription when supported, thereby reducing the need for decryption and re-encryption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display transmitter device decrypts and re-encrypts secure DRM content for transmission, then the content can be securely delivered to the display receiver device, but the power consumption and processing cost increase significantly
Solution Approach 1:
The patent introduces a DRM scheme as an intermediary mechanism that enables secure content delivery without requiring the transmitter to perform full transcription. The DRM scheme acts as a mediator between the content server and display receiver, allowing the receiver to handle decryption and presentation rights management, thereby reducing the transmitter's processing burden and power consumption while maintaining security.
Solution Approach 2:
The patent changes the operational parameters of DRM content handling by introducing a mode where the display transmitter device passes through secure DRM content without performing decryption and re-encryption operations. This parameter change in the transmission mode allows the content to remain encrypted throughout the transmission chain, eliminating the energy-intensive transcription process while preserving secure delivery through proper DRM scheme implementation.
2Adaptability or versatility
If the display transmitter device performs transcription operations to encrypt and decrypt DRM content, then content compatibility is maintained, but the processing cost and time increase
Solution Approach 1:
The DRM scheme serves as an intermediary that maintains content compatibility across different devices without requiring the transmitter to perform full transcription operations. The scheme handles compatibility management at the protocol level, allowing the transmitter to simply pass through encrypted content while the receiver manages decryption and presentation based on the agreed DRM scheme, thereby maintaining productivity.
3Adaptability or versatility
If the display transmitter device decrypts secure DRM content to obtain clear content for transmission, then the content can be universally displayed, but the security protection is reduced during transmission
Solution Approach 1:
The patent changes the transmission parameter by maintaining the content in encrypted form throughout the transmission process. Instead of decrypting and re-encrypting the content, the system passes through the secure DRM content encrypted from the content server directly to the display receiver, eliminating the security vulnerability window during transmission while the DRM scheme ensures compatibility through proper decryption at the receiver end.
Data Source
AI summary
Embodiments include apparatuses, methods, and systems including a wireless display system to provide digital right management secure content to a display receiver device. The display transmitter device may determine to provide a decryption and presentation license for the display receiver device based on the DRM credential and the DRM scheme of the display receiver device. The display transmitter device may further pass through the secure DRM content to the display receiver device based on provision of the decryption and presentation license, wherein the secure DRM content is passed through the display transmitter device without transcription by the display transmitter device. Other embodiments may also be described and claimed.