Install gajim-omemo by entering the following commands in the terminal:
sudo apt update sudo apt install gajim-omemo
Description:
Gajim plugin for OMEMO Multi-End Message and Object Encryption
This Plugin adds support for the OMEMO Encryption to Gajim. . OMEMO encryption (OMEMO Multi-End Message and Object Encryption) gives you all the advantages you would expect from a modern-day encryption protocol like Future and Forward Secrecy and deniability while allowing you to keep the benefits of message synchronization and offline delivery. . It is compatible with the Android XMPP client Conversations.
Homepage: https://dev.gajim.org/gajim/gajim-plugins/wikis/OmemoGajimPlugin
Version: 2.5.8-1
Section: universe/net