Gajim has been installed. Gajim supports plugins: Edit / Plugins Plugins are installed in: ~/.local/share/gajim/plugins And configuration for plugins is located in: ~/.config/gajim/pluginsconfig To use encryption you may use either of the following: E2EE (End to End message Encryption) https://www.dlitz.net/software/pycrypto/ https://en.wikipedia.org/wiki/End-to-end_encryption Enable option CRYPTO in make config Note that CRYPTO should not be enabled if you intend to use below explained OTR OTR (Off-the-Record Messaging) * Recommended https://otr.cypherpunks.ca/ https://en.wikipedia.org/wiki/Off-the-Record_Messaging If you wish to use OTR, install it from Plugins: Edit / Plugins / Off-The-Record Encryption To use OTR, you need to generate a key from OTR plugin configuration