Peer-to-Peer Media Distribution with Dynamic Key Management
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Solution Overview
Problem
Current digital content distribution systems face challenges in securely delivering media across networks, as they often rely on centralized servers, which are costly and vulnerable to piracy, and existing cryptographic protection methods are susceptible to reverse-engineering and key exposure.
Innovation Solution
A non-autonomous peering network system that divides media content into segments, each decryptable with a unique key, and uses a license server to manage playback, ensuring secure and portable content distribution while preventing unauthorized copying and transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If centralized servers are used for content distribution, then content delivery is simplified, but security against piracy deteriorates and operational costs increase
Solution Approach 1:
The patent segments media content into multiple segments and distributes them across a peer-to-peer network rather than using centralized servers. Each peer stores and shares segments, creating a distributed content delivery system that maintains ease of operation while improving security through decentralization and reduced single-point failure risk.
2Reliability
If cryptographic protection methods are used, then content security is improved, but vulnerability to reverse-engineering and key exposure increases
Solution Approach 1:
The patent introduces a license server as an intermediary that manages cryptographic keys and licensing information. Instead of embedding keys directly in content or player devices, the license server acts as a trusted mediator that authenticates players and distributes keys dynamically, reducing reverse-engineering vulnerability while maintaining content security.
Solution Approach 2:
The patent implements dynamic key management where cryptographic keys are not static but are distributed and updated through the license server based on player authentication and licensing status. This dynamic approach prevents reverse-engineering of fixed keys while maintaining robust content protection.
3Loss of energy
If content is distributed across peer-to-peer network, then bandwidth costs are reduced, but system complexity increases
Solution Approach 1:
The patent makes each peer device multi-functional by combining content storage, content sharing, and license verification capabilities in a single node. Players not only consume content but also act as distribution points for other users, reducing overall bandwidth costs while managing complexity through standardized peer functionality rather than separate specialized components.
Data Source
AI summary
A method and apparatus for playing back a media content instance is disclosed. The method permits the use of downloadable variants to upgrade or change cryptographic functions performed by the playback device, thus permitting content protection schemes to be renewed.