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

Claim 6:
7. A non-transitory computer-readable medium storing:
instructions configured to cause one or more processors to receive 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;
instructions configured to cause one or more processors to transmit the setup information to the receiving client;
instructions configured to cause one or more processors to receive 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;
instructions configured to cause the one or more processors to access a list of intended recipients of the message;
instructions configured to cause the one or more processors to filter 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
instructions configured to cause one or more processors to transmit the message including the ephemeral content to the receiving client.