OMEMO is not a server feature, it's a client feature, but yes OMEMO works with Prosody in the picture. It's mature, modern and actively developed, the full list of extensions supported by Prosody is here: https://prosody.im/doc/xeplist

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johnisgood 4 days ago | parent [-]

> OMEMO is not a server feature, it's a client feature

Are you sure?

https://xmpp.org/extensions/xep-0384.html#server-side

Additionally, as per your link, it says "Supported, XEP-0222" for OMEMO encryption, not that "Applicable to clients only, so will work with Prosody", like it does for some others.

What gives?

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daneel_w 4 days ago | parent [-]

For OMEMO to function smoothly it wants permanent storage for Publish/Subscribe functionality (XEP-0222) on the server. The feature predates OMEMO and was designed for various other purposes, such as storing a contact roster or profile picture on your account. OMEMO works without XEP-0222, but then the clients are forced to "meet for the first time" every time they connect and want to exchange encrypted messages. OMEMO in itself happens entirely on the clients.

	▲	johnisgood 3 days ago \| parent [-]
		I see. Thanks!