Premises Gateway Transcoding for Content Security and Home Network Compatibility
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Solution Overview
Problem
Existing content distribution systems face challenges in protecting valuable content within user premises networks due to the lack of authentication entities for connected devices, leading to unauthorized access and distribution, and existing DRM and CA technologies are incompatible with home networking models, resulting in security compromises.
Innovation Solution
A premises gateway apparatus and method that decrypts and transcodes content using a content key, re-encrypts it, and provides it to client devices, enabling secure content transfer across multiple devices while maintaining usage rights and restrictions, using a DRM server to manage content keys and ensure compatibility with various devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing DRM and CA technologies are used for content protection, then content security is improved, but compatibility with home networking models deteriorates and device complexity increases
Solution Approach 1:
The gateway device serves as an intermediary between the content distribution network and home networking devices. It receives protected content from the network, decrypts it using CA technology, and re-encrypts it with DRM technology for distribution to client devices. This intermediary approach allows the system to maintain both CA-based network security and DRM-based device compatibility without requiring direct integration between incompatible systems
Solution Approach 2:
The content protection system is segmented into distinct functional layers: network-level protection using CA technology at the gateway, and device-level protection using DRM technology at client devices. This segmentation allows each layer to operate with its own security mechanisms independently, resolving the compatibility issue between CA and DRM while maintaining end-to-end security
2Ease of operation
If content is transferred across multiple devices within user premises, then ease of operation is improved, but risk of unauthorized access and distribution increases
Solution Approach 1:
The system implements feedback mechanisms where the gateway device monitors content requests from client devices, verifies DRM licenses, and controls content distribution based on usage rights. This feedback loop enables seamless content transfer across authorized devices while preventing unauthorized access, as the gateway continuously enforces security policies based on real-time device authentication and content rights information
3Reliability
If authentication entities are added to protect content within user premises networks, then content security is improved, but device complexity and system configuration difficulty increase
Solution Approach 1:
Client devices within the home network perform self-authentication by presenting DRM licenses to the gateway device. The gateway automatically verifies these licenses and grants content access without requiring manual configuration or additional authentication entities. This self-service approach maintains strong security while minimizing system complexity and configuration requirements
Data Source
AI summary
Methods and apparatus for ensuring protection of transferred content. In one embodiment, content is transferred while enabling a network operator (e.g., MSO) to control and change rights and restrictions at any time, and irrespective of subsequent transfers. This is accomplished in one implementation by providing a premises device configured to receive content in a first encryption format and encodes using a first codec, with an ability to transcrypt and/or transcode the content into an encryption format and encoding format compatible with a device which requests the content therefrom (e.g., from PowerKey/MPEG-2 content to DRM/MPEG-4 content). The premises device uses the same content key to encrypt the content as is used by the requesting device to decrypt the content.