Link-s Enterprise P2P Encrypted File Transfer & Precise Sharing Solution

1. Cross-Regional Large File Transfer & Sharing: Dual Pain Points of Efficiency & Security

For files of dozens or even hundreds of GB—such as database backups, code repositories, design source files, confidential business data, and system logs—transfer and cross-department sharing using traditional methods exposes critical weaknesses:

• Unstable transfer & poor sharing experience: Network fluctuations easily cause interruptions, repeated transfers drastically reduce efficiency, and team sharing permissions lack fine-grained control.
• Weak encryption & high security risks: Traditional ciphers like RSA/ECC cannot resist future quantum computing attacks; no forward secrecy means historical data can be decrypted if keys are leaked; no session-level isolation. Some solutions even use plaintext transmission, risking interception, tampering, and leakage during third-party relay.
• Unmet compliance requirements: Data must stay in-domain, permissions must be fine-grained, sharing/download behavior must be auditable, and national secret algorithms (SM4) must be supported.

Link-s Enterprise Solution is a security solution built specifically to address these dual pain points of transfer + sharing.

2. Core Technical Advantages: P2P Encryption + Resuming + Private Deployment + Precise Sharing

1. P2P Encrypted Transfer, Data Never Lands

Link-s uses a P2P invitation mechanism to establish temporary encrypted tunnels. Files travel directly from sender to receiver without passing through any intermediate servers. Transmission uses a hybrid encryption system: Kyber-768 Post-Quantum + AES-256/SM4-CTR. Keys are generated and stored only at endpoints; servers cannot obtain keys or decrypt content. Both transfer and sharing with designated members guarantee end-to-end security.

2. Breakpoint Resuming + Auto Reconnection for Complex Networks

Built-in breakpoint resuming and auto-reconnection on disconnection. Transfers continue from the interrupted position without restarting. Large file sharing in teams no longer fails repeatedly due to network fluctuations.

3. Full-Stack Private Deployment to Protect Data Sovereignty

For organizations with strict data sovereignty requirements, full private deployment is available: Signaling Service, Relay Service, Audit Platform, and Sharing Policy Engine can all be deployed on the enterprise intranet, ensuring data never leaves the domain and easily meets compliance requirements.

4. Precise Sharing: Fine-Grained Control by File & Contact

Abandoning inefficient "public link" or "all-visible" sharing models, Link-s provides dual sharing control at contact and file levels:

• Authorize by contact: When sharing files or folders, you can precisely select visible contacts. Unauthorized users cannot see the content in "discovered files".

3. Layered Technical Architecture: Stable, Reliable, Easy to Operate

Link-s uses a standardized layered architecture with five core components balancing performance, security, and sharing management:

4. Highly Scalable Architecture: Clustered Deployment, No Single Point of Failure

1. Decentralized Signaling Cluster

Signaling service uses a decentralized distributed cluster. Any node can access global services; session status and user info sync automatically. Single points of failure are eliminated; automatic failover ensures uninterrupted service, with unlimited horizontal scaling.

2. Relay Service Cluster

Relay service supports clustered deployment with unlimited nodes, elastic scaling with business volume. Optimal relay nodes are assigned intelligently during cross-network transfer to ensure availability and stability.

3.Global Audit + Sharing Behavior Traceability

Audit platform enables full-dimensional control: account lifecycle management, force logout, file sharing permission control, black/white list policies, full sharing access logs (who, when, downloaded), meeting enterprise fine-grained operation and compliance needs.

5. Powerful Transfer + Flexible Sharing Mechanism

• P2P Direct Connection: LDC, WDC, DHC establish direct P2P links with no speed limits. Files never pass through servers.
• Breakpoint Resuming: Resume after interruption, auto-recover on reconnection. Large file sharing never fails halfway.
• Streaming Encryption: Encrypt during transfer, decrypt on reception — no need to wait for full file transfer.
• Multi-Thread Parallelism: Auto-block large files, multi-thread concurrent transfer, fully utilize bandwidth.

Four Intelligent Connection Modes for All Scenarios

• L-DC: LAN P2P Direct Connection
• W-DC: LAN + WAN Direct Connection
• DH-DC (P2P Hole Punching): Public Network Penetration
• Relay: Cross-Network Relay Forwarding

Fully covers intranet collaboration, server-client transfer, cross-regional remote collaboration, and more — balancing sharing experience and transfer speed.

6. Deep Private Deployment for High-Compliance Sharing

Enterprises can deploy the full suite on the intranet independently:

• Signaling Control Server: Connection negotiation, user auth, session scheduling
• Relay Server: Clustered deployment for stable cross-network transfer
• Audit Management Platform + Sharing Policy Engine: Unified configuration of log traceability, user management, black/white lists, contact authorization, etc.

Truly achieves data in-domain, permissions controllable, sharing auditable, access blockable, perfectly adapting to extreme data security and compliance requirements.

7. Solution Summary: Encrypted Transfer + Precise Sharing, Rebuild Enterprise File Collaboration