OMEMO
EXTENSION TO XMPP FOR MULTI-CLIENT END-TO-END ENCRYPTION
OMEMO (encryption); OMEMO (cryptography)
OMEMO is an extension to the Extensible Messaging and Presence Protocol (XMPP) for multi-client end-to-end encryption developed by Andreas Straub. According to Straub, OMEMO uses the Double Ratchet Algorithm "to provide multi-end to multi-end encryption, allowing messages to be synchronized securely across multiple clients, even if some of them are offline".