Patent ID: 11882231
Assignee: WHATSAPP LLC
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method, comprising:
receiving setup information for an end-to-end encrypted session between a sending client and a receiving client, the setup information comprising information relating to a first encryption key for decrypting message content;
transmitting the setup information to the receiving client;
receiving a message including ephemeral content, the ephemeral content associated with encrypted media and a second encryption key for decrypting the encrypted media, wherein the message further includes an ephemeral content flag to designate the encrypted media of the message as representing shared ephemeral content;
filtering the list of intended recipients, the filtering comprising:
removing recipients that do not have a symmetric relationship with a sending user account associated with the sending client account from the list,
removing recipients that block messages from the sending user account, and
removing recipients whose messages are blocked by the sending user account; and

transmitting the message including the ephemeral content to the receiving client.