Notes on private messaging

What we write about

These are explainers, not announcements. The recurring argument is that encrypting message content is the easy half of private messaging, and the half every app has already solved. The hard half is metadata - who contacted whom, when, and how often - which leaks through the infrastructure rather than through the ciphertext.

So the posts tend to work through one mechanism at a time: how the Double Ratchet derives a fresh key per message, why a server in the path sees things its operator cannot un-see, what a public blockchain does and does not reveal. Where a competitor does something better, we say so - a comparison that only flatters the author is not worth reading. Shorter definitions live in the glossary, and the practical walkthroughs are in the guides.