Cross-Network Content Sharing via Direct Stream Relay

The patent uses a cloud server as an intermediary to establish initial connections and exchange encryption keys between devices on different networks. However, once connected, the actual data stream is transmitted directly between devices without passing through the cloud server, thus maintaining cross-network capability while eliminating the speed penalty of continuous cloud relay.

The patent segments the data transmission process into two parts: control signaling (including key exchange) that goes through the cloud server, and actual media data streams that are transmitted directly between devices. This segmentation allows the system to maintain security and connectivity through the cloud while achieving high-speed direct peer-to-peer data transfer.

The patent performs encryption key exchange and establishes secure connections through the cloud server before actual data transmission begins. Once the secure direct connection is established, data is encrypted end-to-end and transmitted directly without requiring cloud-based decryption, thus maintaining security while eliminating continuous decryption latency.

The patent extracts the decryption function from the cloud server and moves it to the local devices. Each device decrypts incoming encrypted data streams locally using its private key, rather than sending data to the cloud server for decryption. This extraction eliminates the time-consuming cloud decryption step while maintaining end-to-end security.