Restart Gajim, and activate OMEMO in Gajims Plugin Manager
Enable the OMEMO plugin in the Plugin Manager. If your contact supports OMEMO, you should be able to activate it using the lock icon in the lower right of your chat window.
When you send your first message, the plugin will query your contacts encryption keys and you will see them in a readable fingerprint format in the fingerprint window which pops up. You have to trust at least one fingerprint to be able to send messages. You can receive messages from fingerprints where you didn't make a trust decision, but you can't receive Messages from not trusted fingerprints.
Verification QR Codes
It is possible to show a QR Code for verification in the plugin's configuration window.
You have to install the python3-qrcode packages for QR Codes to work (Debian, Ubuntu).
If you want to use PIP for installing python packages, qrcode and pillow packages have to be installed.
Groupchat with OMEMO encryption works only in rooms that are:
works only with contacts that you have in your roster
If your server supports http_upload (See ServerInfo Window) your file transfers are encrypted.
P2P file transfers via Jingle are not encrypted
For decrypting and showing pictures in the chat window use the UrlImagePreview plugin.
To see OMEMO related debug output, start Gajim with the following parameters:
I found a bug
Please report it to the issue tracker. If you are experiencing misbehaviour, please provide detailed steps to reproduce this and provide debugging output. Also, please always mention the exact Gajim version you are using.