Access Control for Peer-to-Peer Content Sharing
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Solution Overview
Problem
Traditional peer-to-peer content sharing systems often require high bandwidth and lack centralized access control, leading to unauthorized access and monitoring challenges, especially in emerging markets with limited network infrastructure.
Innovation Solution
A user interface and system that utilize a centralized access control mechanism, including a media server and user devices, to manage media item access through encryption and decryption, allowing peer-to-peer sharing with limited or no internet access, and integrating digital rights management to control content usage and distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If content is shared via peer-to-peer connections without centralized control, then sharing speed and user autonomy are improved, but security and access control capability deteriorate
Solution Approach 1:
The patent introduces a media server as an intermediary component in the peer-to-peer sharing system. The media server receives wrapped encryption keys from content providers, performs authorization checks, and releases decryption keys to authorized users. This mediator enables centralized access control and security management while preserving the decentralized peer-to-peer content delivery architecture, thus resolving the contradiction between sharing speed and access control capability.
2Productivity
If encryption keys are transmitted directly between peer devices, then sharing efficiency is improved, but security and key management control deteriorate
Solution Approach 1:
The media server acts as a secure intermediary for encryption key transmission. Instead of direct peer-to-peer key exchange, the content provider's device wraps the encryption key and sends it to the media server. The server verifies authorization and selectively releases decryption keys to authorized users. This intermediary approach maintains sharing efficiency while eliminating direct peer exposure and enhancing security control.
Solution Approach 2:
The system performs preliminary authorization verification through the media server before actual content sharing occurs. The server pre-validates user permissions and prepares decryption keys in advance, ensuring that only authorized users can access content. This preliminary security check prevents unauthorized access while maintaining efficient sharing for authorized users.
3Device complexity
If decentralized peer-to-peer sharing is implemented, then system complexity is reduced, but ability to manage authorized users deteriorates
Solution Approach 1:
The media server serves as a centralized management intermediary that handles all authorization and user management tasks. Content providers and users interact with the server for key management, permission verification, and access control. This centralized management layer provides robust user management capability while the actual content sharing remains decentralized through peer-to-peer connections, balancing system complexity with management capability.
Data Source
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AI summary
Implementations disclose an access control mechanism for peer-to-peer sharing technology. A method includes receiving, by a processing device of a first user device, an encrypted media item and a wrapped encryption key from a second user device via a peer-to-peer connection; transmitting, by the first user device, the wrapped encryption key and a request to a media server to determine whether the first user device is authorized to play the encrypted media item; receiving, from the media server, a response indicating the first user device is authorized to play the encrypted media item, the response comprising an encryption key derived from the wrapped encryption key; and decrypting the encrypted media item using the encryption key to play the media item.