Controlled Peer-to-Peer Content Sharing via DRM Key Rebinding
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Solution Overview
Problem
Uncontrolled peer-to-peer distribution of content leads to significant revenue loss for content owners, necessitating a solution that protects rights while allowing sharing and distribution.
Innovation Solution
The implementation of controlled peer-to-peer sharing systems using digital rights management (DRM) technology, which enables content owners to specify and enforce sharing rights, allowing users to share content with reduced capabilities or limitations, while ensuring secure and authorized sharing through cryptographic mechanisms and semi-trusted control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If uncontrolled peer-to-peer distribution is allowed, then user sharing freedom is improved, but content owner revenue is lost
Solution Approach 1:
The patent introduces a DRM system as an intermediary between content owners and users. The DRM engine acts as a mediator that enables peer-to-peer sharing while enforcing rights management policies, allowing controlled distribution that generates revenue through licensing mechanisms rather than complete prohibition
Solution Approach 2:
The system changes the parameters of content distribution by introducing controlled sharing mechanisms. Instead of binary allowed/disallowed distribution, the system enables sharing with modified parameters such as usage limits, device restrictions, and time constraints, thereby maintaining revenue streams while allowing user sharing behavior
2Reliability
If DRM control mechanisms are implemented, then content owner rights are protected, but user sharing capability is reduced
Solution Approach 1:
The patent segments the content distribution system into multiple components: content owners, DRM servers, user devices with DRM engines, and peer-to-peer communication channels. This segmentation allows fine-grained control over sharing rights, enabling selective enforcement of protections while maintaining useful sharing capabilities through modular rights management
Solution Approach 2:
The DRM system implements dynamic rights management where sharing capabilities are not fixed but can be adjusted based on policies, user licenses, and content type. The system dynamically evaluates sharing requests and adjusts permissions accordingly, maintaining strong protection where needed while enabling sharing where authorized
3Loss of energy
If controlled sharing with restrictions is enabled, then revenue loss is reduced, but system complexity increases
Solution Approach 1:
The patent employs cryptographic copying mechanisms where content is encrypted with DRM keys and distributed through copied license files rather than direct file sharing. This copying approach enables controlled distribution while managing complexity through standardized cryptographic protocols and automated license management
Solution Approach 2:
The DRM system implements self-service mechanisms where user devices automatically evaluate licenses and enforce rights without requiring constant intervention from content owners or centralized servers. The DRM engines on user devices autonomously manage their own rights, reducing the operational complexity burden on content owners while maintaining strong protection
Data Source
AI summary
Systems and methods are described for peer-to-peer sharing of electronic content. In one embodiment, if a license associated with a content item permits a sharing peer to share the content item with a receiving peer, the sharing peer rebinds a cryptographic key associated with the content item to the receiving peer and generates a sharing license for the content item. The sharing peer sends the sharing license and the content item to the receiving peer for consumption.