Keychat

MLS is built for large groups; one-to-one support is a byproduct rather than an optimization target.…

To many people, “protocol” comes with built-in prestige, while “app” is treated as ordinary. Maybe Keychat should publish a Keychat Protocol too.…

Old Nostr DM (NIP-4) integrates four capabilities into a single Nostr key—it serves as an ID, an encryption key, a receiving address, and a sending address. The encryption key in NIP-4 does not change, so NIP-4 messages lack both forward secrecy and backward secrecy. Consequently, if…

This note will give you a clearer understanding of Nostr DM. 👇…

Keys are the native ID for bots. Bot-to-bot chat is key-to-key chat. Keychat.…

Happy New Year, Keychat users! In 2026, we’ll keep building and refining Keychat, step by step, toward our design goals.👇…

A super app isn’t an “everything app.” Watch Keychat’s intro video, and you’ll see exactly where it fits best—and why that framing makes sense.…

All Keychat messages (whether one-to-one, small group, or large group) can be intuitively understood using the metaphor of a "letter.” 👇…

The original Signal protocol operates over a private network; when applied to Nostr, a public network, the privacy issue becomes more pronounced. Although the eavesdropper cannot decrypt the message's content, if the sender's (or recipient's) address remains unchanged, the eavesdropper can still analyze the

This proposal aims to introduce Signal Protocol into the Nostr network, which allows Nostr clients to have end-to-end encryption for private communications with forward secrecy and post-compromise security. Specifically, the address-refreshing technique is used to minimize tracking and avoid social engineering.👇…

The Nostr DMs you receive in Keychat are marked as “Weak Encryption” because 👇…