Notices by Hubert Chathi (hubert@social.uhoreg.ca), page 3

The Olm section of my Matrix Client Tutorial is functioning, but still needs a bunch of explanatory text and some tests written. Is it weird to talk about a section in a book "functioning"? Welcome to literate programming.

I love using literate programming for this tutorial. It just feels so natural. If you ever want to write a tutorial or other document for teaching something programming-related, consider using literate programming.

@Hugo XMPP's OMEMO is based on the Double Ratchet system introduced by Signal, and used in most modern end-to-end encrypted messaging systems (before MLS). You could say that MLS is inspired by the Double Ratchet -- it came about from a desire to make something that scaled better than Double Ratchet for larger groups, and it uses some ratchet constructions. But MLS uses a tree structure that makes it more efficient, and also introduces some new features such as authenticated group membership.

XMPP might adopt MLS in the future, but I haven't heard of anyone trying to do so. But if anyone is working MLS in XMPP, I'd be interested to know.

I haven't mentioned it here yet, I've been (slowly) writing a tutorial for writing a Matrix client. It's still in the very early stages, but I've gotten to showing how to send and receive events, and I've recently been working on the end-to-end encryption section. For those who saw an earlier version, you can now know more than you wanted to know about uploading device and one-time keys, and keeping track of recipient devices.

The tutorial is available at uhoreg.gitlab.io/matrix-tutori…