US Patent 11451614 Cloud authenticated offline file sharing

Described embodiments provide systems and methods for transferring a file. A sender device configured to transfer a file to a receiver device may send an identifier of the receiver device and a public key to a server via a first network. The sender device may receive, via the first network prior to disconnecting from the first network, a session token from the server. The session token and the public key may be sent to the receiver device via the first network. The sender device may detect, after receiving the session token, a peer-to-peer (P2P) wireless network established by the receiver device. The P2P wireless network may broadcast a service set identifier (SSID) with a network key encrypted using the public key. The sender device may connect, using the network key, to the P2P wireless network to transfer the file to the receiver device via the P2P wireless network.